Cold insulation container

Abstract

To provide a cold insulation container capable of maintaining a high cold insulation effect even after repeated use.SOLUTION: A cold insulation container includes: a rectangular shaped container body 1 opened on a ceiling surface and including an outer shell wall 1a formed of a flexible sheet, an insulation plate 3a for a bottom surface provided along an inner surface of the outer shell wall 1a, and insulation plates 4a, 5a, 6a, and 7a for front, rear, right and left side surfaces; and a lid body 2 including an outer shell wall 1a continuous with an opening 1b and an insulation plate 10 for a ceiling on its inner surface, and makes the opening openable and closable by the insulation plate 10 for the ceiling moving in and out of the opening 1b. The insulation plate 10 for the ceiling includes a sealing band 11 which is a square matching with the opening 1b, and has a surface 10a facing a bottom surface 3 of the container body 1 when the lid body 2 is closed, being covered with a sheet material 12, and is integrated with the sheet material 12 on its circumferential side. The sealing band 11 is formed by folding an extension extending outward from the periphery of the sheet material 12 a plurality of times on the circumferential side of the insulation plate 10 for the ceiling.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a cold storage container used for transporting frozen foods and the like.

Background Art

[0002] Conventionally, cold storage containers for maintaining raw materials, frozen foods, etc. at a low temperature have been developed. Such a cold storage container has its surroundings surrounded by a heat insulating material with high heat insulation properties. For example, the cold storage container of Patent Document 1 is composed of a container body and a lid made of a foam having a semi-rigid synthetic resin closed cell structure, and these are housed in a bag made of a sheet-like heat insulating protection material and the lid of the bag is closed so that the lid of the heat insulating box adheres closely to the opening of the container body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above-described cold storage container, during repeated use, the heat insulating material made of the foam constituting the heat insulating container body and the lid may be compressed and deformed. Further, the sheet forming the outer periphery of the container may be stretched. Thus, due to the deformation of the heat insulating material, the opening shape of the container body or the lid may be deformed, or the sheet may be stretched and the container body may be distorted, resulting in a gap being formed between the opening and the lid. Therefore, there has been a problem that the inside of the container body communicates with the outside through the above gap, and the cold air inside the container body escapes to the outside, making it impossible to maintain the cold air inside the container body. An object of the present invention is to provide a cold storage container that can withstand repeated use and maintain a high cold storage effect over a long period of time.

Means for Solving the Problems

[0005] A first invention includes a container body in a rectangular parallelepiped shape with an open ceiling surface, which is provided with an outer shell wall formed of a flexible sheet, a bottom heat insulating plate provided along the inner surface of the outer shell wall, and left, right, front, and rear side heat insulating plates, and a lid body that is provided with an outer shell wall continuous with the opening edge of the container body and a ceiling heat insulating plate on the inner surface of the outer shell wall, and the ceiling heat insulating plate can open and close the opening by entering and exiting the opening. The ceiling heat insulating plate is a quadrilateral that coincides with the opening, and when the lid body is closed, the surface facing the bottom surface of the container body is covered with a sheet material, and a sealing strip portion integrated with the sheet material is provided on its peripheral side surface. The sealing strip portion is formed by folding a plurality of extension portions extending outward from the periphery of the sheet material to the outer surface of the ceiling heat insulating plate around the peripheral side surface of the ceiling heat insulating plate.

[0006] A second invention includes a container body in a rectangular parallelepiped shape with an open ceiling surface, which is provided with an outer shell wall formed of a flexible sheet, a bottom heat insulating plate provided along the inner surface of the outer shell wall, and left, right, front, and rear side heat insulating plates, and a lid body that is provided with an outer shell wall continuous with the opening edge of the container body and a ceiling heat insulating plate on the inner surface of the outer shell wall, and the ceiling heat insulating plate can open and close the opening by entering and exiting the opening. On the outer peripheral surface of the container body, there is a slack prevention belt that spans between a pair of adjacent side surfaces, a first fixing portion provided on one of the pair of side surfaces to which one end side of the slack prevention belt is fixed, and a second fixing portion provided on the other of the pair of side surfaces to which the other end side of the slack prevention belt is fixed. Either one or both of the first fixing portion and the second fixing portion enable adjustment of the fixing position of one end side or the other end side of the slack prevention belt.

[0007] The third invention is that on the inner surface of the container body, a content volume mark is provided at a position away from the opening by a distance corresponding to the thickness of the ceiling heat insulating plate in the bottom direction.

[0008] The fourth invention is that the bottom heat insulating plate and the side heat insulating plate are separable from the outer shell wall, and the outer shell wall is foldable along a specific fold line.

[0009] The fifth invention is that on the outer shell wall, a stitch corresponding to the fold line is provided.

Advantages of the Invention

[0010] According to the first invention, a rectangular ceiling heat insulating plate can be fitted into the opening of the container body to close the opening. When closing the opening, the seal band provided on the peripheral side surface of the ceiling heat insulating plate is in close contact with the inner periphery of the opening, so that the cold insulation effect can be maintained without cold air escaping or outside air invading. Therefore, even if the opening of the container body is deformed by repeated use, the cold insulation effect can be maintained. In particular, if the outer shell wall surrounding the heat insulating plate is made of a sheet material with high heat insulation properties, the heat insulation performance can be further enhanced.

[0011] According to the second invention, by fixing both ends of the anti-loosening belt to adjacent side surfaces respectively, the arrangement of the side heat insulating plate of the container body can be maintained and the deformation of the container body can be prevented. Also, even if the side heat insulating plate is deformed or the sheet constituting the outer shell wall stretches due to repeated use, the distortion of the container body can be corrected by adjusting the fixing position of the anti-loosening belt. Therefore, it is possible to prevent cold air from escaping to the outside due to the deformation of the container body or the lid body, and maintain the cold insulation effect.

[0012] According to the third invention, the appropriate storage capacity of the object to be cold-insulated can be known inside the container body. Therefore, it is impossible to overfill the object to be cold-insulated in the container body, causing the lid body not to close or the container body to deform. Since the lid fits tightly, a reliable cold insulation effect can be obtained. Also, neither the lid nor the container body will be deformed by an overloaded object to be insulated, and the cold insulation effect can be maintained over a long period. Furthermore, since the appropriate capacity for the container body is known, the capacity can be utilized without waste.

[0013] According to the fourth invention, when the cold insulation container is not in use, the heat insulation plate can be separated and the outer shell wall can be folded and stored. Therefore, the storage space can be saved.

[0014] According to the fifth invention, since the folding line is made clear by the stitches, the folding operation of the outer shell wall becomes easy.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0016] [Embodiment] The embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external perspective view of the cold insulation container. FIG. 2 is a bottom view of the embodiment, FIG. 3 is a partially enlarged view of the lid, FIG. 4 is an explanatory view of the seal band portion provided on the lid, FIG. 5 is a left side view of the container body, and FIG. 6 is a view showing the folded state of the cold insulation container of the embodiment. FIG. 6 is a schematic view for explaining the sealed state of the embodiment.

[0017] The cold storage container of the embodiment is a large-sized cold storage container that can be carried by a person. As shown in FIG. 1, the cold storage container is composed of a container body 1 and a lid body 2, and has a substantially rectangular parallelepiped shape. The container body 1 is composed of a rectangular bottom surface portion 3 as shown in FIG. 2, a front surface portion 4, a back surface portion 5, a left side surface portion 6, and a right side surface portion 7, and has an opening 1b on the ceiling surface at the upper ends of the front surface portion 4, the back surface portion 5, the left side surface portion 6, and the right side surface portion 7. As shown in FIGS. 1 and 5, the shapes of the front surface portion 4, the back surface portion 5, the left side surface portion 6, and the right side surface portion 7 are all rectangular, and the outer shape and the inner shape of the container body 1 are rectangular parallelepiped shapes.

[0018] Further, along the inner surface of a bag-shaped outer shell wall (outer shell sheet) 1a formed by sewing a flexible sheet into a rectangular parallelepiped shape, a bottom heat insulating plate 3a and side heat insulating plates 4a, 5a, 6a, 7a are arranged on the bottom side and the side surface side, respectively. These bottom heat insulating plate 3a and side heat insulating plates 4a, 5a, 6a, 7a are made of foams of synthetic resins such as polyurethane and styrene. Furthermore, the surfaces of the heat insulating plates 3a, 4a, 5a, 6a, 7a are each covered with an inner sheet material (not shown). Although the inner sheet material covering each of the heat insulating plates 3a, 4a, 5a, 6a, 7a is omitted in the figure, actually, all of the heat insulating plates 3a, 4a, 5a, 6a, 7a are covered with the inner sheet material and are not exposed. Therefore, hereinafter, the heat insulating plate refers to one covered with the inner sheet.

[0019] Since the heat insulating plates 3a, 4a, 5a, 6a, 7a are arranged on the bottom surface portion 3, the front surface portion 4, the back surface portion 5, the left side surface portion 6, and the right side surface portion 7, respectively, they are rectangular in accordance with the inner wall of the outer shell wall. Therefore, the inner shape of this container body 1 is also a rectangular parallelepiped shape. Note that the outer shell wall 1a is made of a sheet material with high physical strength and durability, such as a vinyl chloride material used for a tent.

[0020] Here, the side heat insulation plates 6a and 7a of the left and right side faces 6 and 7 are each applied with one end against the inner surfaces of both ends of the side heat insulation plate 4a provided on the front face portion 4, and stand up so as to sandwich the side heat insulation plate 5a of the back face portion 5 with the inner surfaces of their respective other ends. Then, the bottom heat insulation plate 3a is fitted into the bottom face portion 3 surrounded by the side heat insulation plates 4a, 5a, 6a, and 7a. In this way, the bottom heat insulation plate 3a and the side heat insulation plates 4a, 5a, 6a, and 7a are arranged inside the outer shell wall 1a.

[0021] And the front and rear side heat insulation plates 4a and 5a are fixed to the outer shell wall 1a, and form the front face portion 4 and the back face portion 5 of the container body 1 respectively. In this embodiment, the side heat insulation plates 4a and 5a are made detachable from the outer shell wall 1a with hook-and-loop fasteners, but any fixing method may be used. For example, they may be fixed through the inner sheet material, but by making them detachable, the heat insulation plates 4a and 5a can be easily replaced.

[0022] Also, only one side on the back face portion 5 side of the bottom heat insulation plate 3a is connected to the side heat insulation plate 5a of the back face portion 5 through the inner sheet material, and a pull-up tape 3b is attached to the side on the front face portion 4 side (see FIG. 6). By pulling up this pull-up tape 3b, the bottom heat insulation plate 3a can be made to stand up along the side heat insulation plate 5a.

[0023] Furthermore, the left and right side heat insulation plates 6a and 7a are each divided into a rear portion 6a1, 7a1 and a front portion 6a2, 7a2 with the dividing line 8 as a boundary. These divided portions are surrounded by the above-mentioned inner sheet material (not shown), and only the surfaces facing the inside of the container body 1 of each other are connected. And the rear portions 6a1 and 7a1 are fixed to the back face portion 5, but the front portions 6a2 and 7a2 are not fixed to the outer shell wall 1a of the left and right side faces 6 and 7 or the side heat insulation plate 4a on the front face portion 4 side, and are made movable inside the container body 1.

[0024] When the cold storage container is not in use (when storing items), the bottom heat insulation plate 3a can be erected, and the front portions 6a2 and 7a2 can be folded inward. However, when the cold storage container is in use, the bottom heat insulation plate 3a is pushed between the left and right side heat insulation plates 6a and 7a to maintain the opposing interval and the erected state of the two side heat insulation plates 6a and 7a.

[0025] On the other hand, the lid 2 includes a base plate 9 provided inside the outer shell wall 1a on the ceiling side that is continuous from the opening edge on the back surface portion 5 side of the container body 1, and a ceiling heat insulation plate 10 provided further inside. These base plate 9 and ceiling heat insulation plate 10 are made of a foam of synthetic resin like other heat insulation plates, and are covered and integrated with an inner sheet material (not shown). The ceiling heat insulation plate 10 is a rectangular plate material with a predetermined thickness, and its outer periphery has dimensions that substantially match the opening 1b of the container body 1.

[0026] Also, as shown in FIG. 3, a seal band portion 11 formed by folding a sheet material is sewn to the peripheral side surface of the ceiling heat insulation plate 10. This seal band portion 11 is formed using a sheet material 12 that covers the surface 10a of the ceiling heat insulation plate 10 facing the bottom surface when the lid 2 is closed.

[0027] The sheet material 12 is a sheet material that covers the surface 10a of the ceiling heat insulation plate 10 and covers the entire ceiling heat insulation plate 10. The sheet material 12 is a separate member from the inner sheet for integrating with the base plate 9. As shown in Fig. 4 when this sheet material 12 is unfolded, it includes a rectangular portion 12a corresponding to the surface 10a, and rectangular extension portions 12b, 12c, 12d, 12e extending outward from each side around the rectangular portion 12a. By making valley folds in sequence from the tip side in the extension direction with the fold lines indicated by one-dot chain lines for the respective extension portions 12b, 12c, 12d, 12e, four seal band portions 11 are formed around the rectangular portion 12a. Then, the rectangular portion 12a is aligned with the surface 10a of the ceiling heat insulation plate 10, and on the peripheral side surface of the ceiling heat insulation plate 10, the seal band portion 11 formed around the rectangular portion 12a is sewn and fixed to an inner sheet (not shown).

[0028] Note that if the extension portions 12b, 12c, 12d, 12e are lightly wound without strongly creasing the fold lines when folding them, the thickness of the seal band portion 11 can be increased. Note that a seal band portion similar to the seal band portion 11 may also be provided around the bottom heat insulation plate 3a.

[0029] Furthermore, on the base plate 9 constituting the lid body 2, flaps 9a, 9b, 9c having a loop surface or a hook surface of a hook-and-loop fastener are formed on three sides other than the side connected to the container body 1. And fastener tapes 13 having a hook surface or a loop surface to be coupled to the respective flaps 9a, 9b, 9c are attached to the upper parts of the outer surfaces of the front portion 4, the left and right side portions 6, 7 of the container body 1 (see Figs. 1 and 5).

[0030] Also, in the ceiling heat insulation plate 10, a pair of fixing portions 14, 14 are provided on the surface 10a (sheet material 12) on the inner side of the container body 1 (see Fig. 1). This fixing portion 14 is a loop surface or a hook surface of a hook-and-loop fastener for attaching a fixing band 15 when the cold storage container is folded and stored. And a fixing band 15 having a hook surface or a loop surface that can be coupled to this fixing portion 14 is attached to the left and right side portions 6, 7. For example, a fixing portion 16 is provided on the left side surface 6 shown in FIG. 5. One end of the fixing band 15 with the other end fixed to the front surface portion 4 side is detachably fixed to the left side surface 6 by the fixing portion 16. Similarly to the left side surface 6, a fixing portion 16 and a fixing band 15 are also provided on the right side surface 7.

[0031] Further, as shown in FIG. 2, low-friction tapes 17, 17, which are strip-shaped low-friction members, are attached along a pair of opposing ridge lines on the long side of the bottom surface portion 3 constituting the bottom surface of the container body 1. The low-friction tape 17 is made of, for example, Tetoron (registered trademark), has strength, and is a material with a much smaller coefficient of friction compared to the material of the sheet constituting the outer shell wall 1a.

[0032] In addition, on each outer surface of the container body 1, a slack prevention belt 19 is provided across a pair of adjacent side surfaces, and a first fixing portion 20a for fixing one end side 19a of each slack prevention belt 19 or a second fixing portion 20b for fixing the other end side 19b is provided on each outer surface. This slack prevention belt 19 is attached to the outer shell wall 1a which is the outer peripheral surface of the container body, and is formed of a material with a small expansion and contraction rate. Note that all four slack prevention belts 19 are the same and are attached so as to cross the ridge lines.

[0033] For example, the other end side 19b of the slack prevention belt 19 is sewn to the second fixing portions 20b, 20b of the left and right side surfaces 6, 7 (see FIGS. 1 and 5). On the other hand, on the front surface portion 4, in the vicinity of the left and right side surfaces 6, 7, a first fixing portion 20a is provided, and one end side 19a of the slack prevention belt 19 is detachably fixed to the left and right side surfaces 6, 7 by this first fixing portion 20a. In order to make one end side 19a of the slack prevention belt 19 detachable, the first fixing portion 20a is provided with a loop surface or a hook surface of a hook-and-loop fastener, and one end side 19a of the slack prevention belt 19 is provided with a hook surface or a loop surface. Then, the hook-and-loop fastener portion of the first fixing portion 20a is made to have a size with a margin so that one end side 19a can be fixed even if the relative position of one end side 19a with respect to the longitudinal direction of the slack prevention belt 19 is slightly changed, that is, the fixing position can be adjusted.

[0034] The first and second fixing parts 20a and 20b as described above are also provided on other side surfaces. Although not shown in the drawings, on the back surface part 5, the first fixing parts 20a and 20a are provided in the same manner as on the front surface part 4, and the corresponding second fixing parts 20b and 20b are provided on the left and right side surface parts 6 and 7.

[0035] In this embodiment, one end side 19a of the anti-loosening belt 19 is detachably attached to the first fixing part 20a so that the fixing position of one end side 19a of the anti-loosening belt 19 can be adjusted. However, the other end side 19b of the anti-loosening belt 19 may be detachably attached to the second fixing part 20b so that the fixing position can be adjusted, or the fixing position may be configured to be adjustable with respect to both the first and second fixing parts 20a and 20b.

[0036] Also, on the inner peripheral surface of the container body, at a position separated from the opening 1b by a distance corresponding to the thickness of the ceiling heat insulating plate 10, a content volume mark 21 indicated by a broken line is provided. This position is the position where the surface 10a of the ceiling heat insulating plate 10 of the lid body 2 that has entered the opening 1b reaches within the container body 1 when the lid body 2 is firmly closed.

[0037] Also, on the front surface part 4 and the back surface part 5, two long and short first and second handles 18a and 18b are attached (see FIG. 1). The first and second handles 18a and 18b are wide belts and are attached at the same position on the outer surfaces of the front surface part 4 and the back surface part 5, approximately at the upper center in the height direction. The width of the belt is a width that is easy for the user of the container body to hold, for example, about 5 cm. The length of the longer first handle 18a is such that when the operator lifts the container body, the hand of the operator holding near the upper end of the first handle 18a does not hit the outer surface of the container body and is located just above the lid belt 2. Also, the length of the shorter second handle 18b is at a position where the hand of the operator holding near the upper end of the second handle 18b hits the outer surface of the container body 1 when the operator lifts the container body 1, for example, at the upper end part of the outer surfaces of the front surface part 4 and the back surface part 5 or hits the outer surface of the lid body 2. Furthermore, on the outer shell walls 1a of the left and right side faces 6, 7 and the bottom face 3, stitches s indicated by dashed lines are provided. These stitches serve as folding lines when folding the outer shell wall 1a.

[0038] [Function and Effect, etc.] An example of using the cold storage container of this embodiment will be described. FIG. 6 shows the folded state of the cold storage container when not in use. The folding procedure of the empty container body 1 is as follows.

[0039] First, fully open the lid 2 and align it along the surface of the back face 5. Next, pull up the pull-up tape 3b to raise the bottom heat insulation plate 3a so that it stands along the back face 5. When the bottom heat insulation plate 3a is separated from the outer shell wall 1a of the bottom face 3, the front parts 6a2, 7a2 of the side heat insulation plates 6a, 7a are released from the restraint by the bottom heat insulation plate 3a and become free. Thus, fold the side heat insulation plates 6a, 7a along the dividing line 8 to move the front parts 6a2, 7a2 inward. If the front parts 6a2, 7a2 move and separate from the outer shell wall 1a, the part of the outer shell wall 1a where the front parts 6a2, 7a2 were arranged inside can be folded along the folding line indicated by the stitch s and folded between the side heat insulation plate 4a of the front face 4 and the side heat insulation plates 6a, 7a of the left and right side faces 6, 7.

[0040] After that, detach the other end side of the fixing band 15 from the fixing parts 16, 16 of the left and right side faces 6, 7 and fix it to the fixing parts 14, 14 of the lid 2 along the back face 5 to maintain the folded state. In this way, by folding, the outer shape of the cold storage container can be reduced, so that when the cold storage container is not in use, the storage space of the storage location of the cold storage container can be saved.

[0041] On the other hand, when using the cold storage container, the container body 1 can be assembled into a rectangular parallelepiped shape in the reverse procedure of the folding procedure. That is, as shown in FIG. 1, the container body 1 is configured by pushing the bottom heat insulating plate 3a into the bottom surface of the outer shell wall 1a with a strong force at the center of the standing side heat insulating plates 4a, 5a, 6a, and 7a. Therefore, at the time of commercial shipment of the cold storage container, it is preferable that the rectangular area of the bottom heat insulating plate 3a is equal to or larger than the size of the bottom surface surrounded by the inner circumferences of the lower ends of the side heat insulating plates 4a, 5a, 6a, and 7a. This is because if the bottom heat insulating plate 3a is larger, the bottom heat insulating plate 3a and the side heat insulating plates 4a, 5a, 6a, and 7a will be in close contact.

[0042] And when the lid body 2 is closed, the flaps 9a, 9b, and 9c provided around the base plate 9 can be attached to the fastener tape 13 on the container body 1 side to fix the lid body 2. Also, when the lid body 2 is closed, the ceiling heat insulating plate 10 enters the opening 1b, but the seal band portion 11 provided on the peripheral side surface thereof seals the gap with the container body 1, so that cold air does not flow out from between the container body 1 and the lid body 2 to the outside, and outside air does not enter the container body 1. Furthermore, since the seal band portion 11 is formed by folding the sheet material 12 a plurality of times, it exhibits elasticity according to the rigidity of the sheet material 12 between the opening 1b and the ceiling heat insulating plate 10. Therefore, even if the opening 1b of the container body 1 and the lid body 2 are slightly deformed due to repeated use or the like, the seal band portion 11 can follow the shape and maintain the sealing function.

[0043] And since the seal band portion 11 is integrally formed from around the rectangular portion 12a of the sheet material 12, the corner formed by the surface 10a and the outer peripheral surface of the ceiling heat insulating plate 10 is covered with the sheet material 12. Therefore, when the lid body 2 is closed, the sheet material 12 covering the corner serves as a guide when the ceiling heat insulating plate 10 enters the opening 1b, and the ceiling heat insulating plate 10 can smoothly enter the opening 1b. Also, since the seal band portion 11 is formed using a part of the sheet material 12, it is possible to configure it at low cost without detachment from the sheet material 12 as might be considered by using other seal members.

[0044] Also, when the sheet forming the outer shell wall 1a stretches or the like, the anti-loosening belt 19 can be reattached and the fixing position of the anti-loosening belt 19 at the first fixing portion 20a can be changed to correct the slack of the sheet. Therefore, the arrangement of the side heat insulating plates 4a, 5a, 6a, 7a can be corrected and the shape of the container body 1 can be maintained in the initial state.

[0045] Furthermore, although the side heat insulating plates 4a, 5a, 6a, 7a may be compressed and deformed due to repeated use of the cold storage container, even if the opening 1b expands more than the initial state, the anti-loosening belt 19 can tighten the outer shell wall 1a to correct the opening 1b and maintain the sealed state by the lid body 2. That is, the cold storage effect can be maintained over a long period.

[0046] Also, when storing the object to be cooled in the container body 1 and closing the lid body 2, the ceiling heat insulating plate 10 is pushed into the opening 1b. If the object to be cooled is filled up to the internal volume mark 21 provided on the inner periphery of the container body 1, the ceiling heat insulating plate 10 can be smoothly pushed into the container body 1 without the contents getting in the way. Therefore, not only does the sealing performance improve and the cold storage effect enhance, but also no extra force is applied to the container body 1 or the lid body 2, which would otherwise cause deformation. Moreover, if the object to be cooled is placed with reference to the internal volume mark 21, the capacity of the container body can be utilized without waste and the workability is also improved.

[0047] Also, since the low-friction tape 17 is attached along the ridge line of the bottom portion 3, the cold storage container containing the object to be cooled can be smoothly moved on the floor by pulling the first handle 18a or the second handle 18b. This low-friction tape 17 may be made detachable from the ridge line portion using a hook-and-loop fastener or the like so that it can be replaced when worn out. Note that since the first and second handles 18a and 18b have different lengths, the container body 1 can be lifted, dragged, and used appropriately according to the height of the operator and the application. In particular, the second handle 18b is useful when dragging the floor or the like, rather than lifting the container body.

[0048] Also, for example, when stacked on top of other cold storage containers or in the case of a cold storage container at a high position, the operator holds the second handle 18b and lifts and carries the cold storage container from the high position. This can prevent the height position of the hand of the operator holding the handle of the cold storage container from inadvertently becoming too high when carrying the cold storage container out of the high position. Therefore, it becomes easier for the operator to apply force when lifting the cold storage container. Also, since the operator can place a hand on the outer surface of the cold storage container and lift it, the posture of the cold storage container can be stabilized and lifted. Also, for example, when carrying the cold storage container by walking while holding it, the operator carries the cold storage container by holding the first handle 18a. As a result, since the operator can carry the cold storage container at a low height, the operator can carry the cold storage container while stabilizing his or her own posture.

[0049] In the above, a part of the bottom heat insulating plate 3a and the side heat insulating plates 6a and 7a is made separable from the outer shell wall 1a so that the container body 1 can be folded. However, the heat insulating plate may be completely removed from the outer shell wall 1a to make it foldable. Alternatively, the heat insulating plate and the outer shell wall 1a may be integrated and made into a configuration that cannot be folded. However, if all the heat insulating plates are made detachable from the outer shell wall 1a, it becomes easier to replace only the heat insulating plates. Note that the cold storage container of the present invention having a high heat insulating effect can be used not only for cold storage but also for heat preservation. Also, it is assumed that the rectangular parallelepiped shape of the cold storage container includes a cubic shape in which all six faces of the cold storage container are square.

Industrial Applicability

[0050] It is suitable for transporting objects to be cooled.

Explanation of Reference Numerals

[0051] 1 Container body 1a Outer shell wall 1b Opening 2 Lid 3 Bottom surface part 3a Heat insulation plate for bottom surface 4 Front part 5 Rear part 6 Left side part 7 Right side part 4a, 5a, 6a, 7a Heat insulation plates for sides 10 Heat insulation plate for ceiling 10a Surface (facing the bottom surface of the heat insulation plate for ceiling) 11 Seal strip part 12 Sheet material 19 Anti-loosening belt 19a One end side 19b The other end side 20a First fixing part 20b Second fixing part 21 Content volume mark s (Folded line) stitch

Claims

1. A rectangular parallelepiped container body with an outer shell wall formed of a flexible sheet, a bottom heat insulating plate provided along the inner surface of the outer shell wall, and side heat insulating plates for the front, rear, left, and right sides, having an open ceiling surface, and A lid body that includes an outer shell wall continuous with the opening edge of the container body and a ceiling heat insulating plate on the inner surface of the outer shell wall, and the ceiling heat insulating plate enters and exits the opening to enable opening and closing of the opening. It is provided with The ceiling heat insulating plate is a quadrilateral that coincides with the opening, and when the lid body is closed, the surface facing the bottom surface of the container body is covered with a sheet material, and a seal band portion integrated with the sheet material is provided on its peripheral side surface. The seal band portion is formed by folding a plurality of extension portions extending outward from the periphery of the sheet material to the surface of the ceiling heat insulating plate multiple times on the peripheral side surface of the ceiling heat insulating plate. A cold storage container.

2. A rectangular parallelepiped container body with an outer shell wall formed of a flexible sheet, a bottom heat insulating plate provided along the inner surface of the outer shell wall, and side heat insulating plates for the front, rear, left, and right sides, having an open ceiling surface, and A lid body that includes an outer shell wall continuous with the opening edge of the container body and a ceiling heat insulating plate on the inner surface of the outer shell wall, and the ceiling heat insulating plate enters and exits the opening to enable opening and closing of the opening. It is provided with On the outer peripheral surface of the container body, A slack prevention belt that spans between a pair of adjacent side surfaces, A first fixing portion provided on one of the pair of side surfaces, to which one end side of the slack prevention belt is fixed, A second fixing portion provided on the other of the pair of side surfaces, to which the other end side of the slack prevention belt is fixed, and Either one or both of the first fixing portion and the second fixing portion enable adjustment of the fixing position of one end side or the other end side of the slack prevention belt. A cold storage container.

3. On the inner side surface of the container body, The cold storage container according to claim 1 or 2, wherein a content volume mark is provided at a position separated from the bottom surface of the container body by a distance corresponding to the thickness of the ceiling heat insulating plate from the opening.

4. The bottom heat insulating plate and the side heat insulating plate are separable from the outer shell wall, The cold storage container according to claim 1 or 2, wherein the outer shell wall is foldable along a specific fold line.

5. The cold storage container according to claim 4, wherein stitches corresponding to the fold lines are provided on the outer shell wall.

Images