Insulated box

Abstract

To provide a heat insulation box capable of sufficiently exhibiting a heat insulation function with no leakage of foamed urethane internally filled, even when a container body and a lid body each are constituted by using two members in combination.SOLUTION: A heat insulation box is provided with a box-shaped container body 3, and a lid body 2 for closing an opening of the container body 3. The lid body 2 comprises a lid body outer side member 21, and a lid body inner side member 22. The container body 3 comprises a body inner side member 30, and a body outer side member 32. The lid body outer side member 21 and the lid body inner side member 22 each comprise either a plurality of lid body engaging tools 24 or a plurality of lid body engaging receivers 25 in a circumferential direction. The body inner side member 30 and the body outer side member 32 each comprise either a plurality of body engaging tools 34 or a plurality of body engaging receivers 35 in a circumferential direction. The lid body 2 and the container body 3 each comprise a lid body vacuum heat insulation material 23 and a body vacuum heat insulation material 33 inside a formed urethane filling part 6 between members. The formed urethane filling part 6 is filled with the formed urethane.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a heat-insulating box body having a heat-insulating function such as a cooler box.

Background Art

[0002] In a heat-insulating box body having a heat-insulating function such as a cooler box, various proposals have been made to enhance the heat-insulating effect. For example, in Patent Document 1, a base heat-insulating structure is constituted by a base outer shell structure and a base inner wall structure, and a lid heat-insulating structure surrounded by a lid outer shell structure and a lid inner wall structure is constituted, and a cooler box combining them is disclosed. Thus, the container body and the lid of the cooler box are each constituted by a combination of two members, and the heat-insulating effect is enhanced by filling each with urethane foam as a heat-insulating material.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the above conventional cooler box, when the container body and the lid are constituted by bonding or welding two members, and then urethane is injected and foamed inside, the urethane may leak from the bonding or welding parts of the two members due to the pressure, or gaps may occur in the bonding or welding parts, and there is a problem that the heat-insulating function of the cooler box cannot be fully exhibited.

[0005] Therefore, the present invention has been made in view of these problems, and aims to provide an insulated box that can fully exhibit its heat insulation function without the foamed urethane filling inside leaking out, even when the container body and lid are each composed of a combination of two components. [Means for solving the problem]

[0006] To solve the above problems, the present invention provides an insulated box comprising a box-shaped container body with an open top and a lid that closes the opening of the container body, wherein the lid comprises an outer lid member that constitutes the top surface of the insulated box and an inner lid member that closes the opening of the container body, wherein the container body comprises an inner body member with an open top and a space capable of accommodating contents, and an outer body member with an open top and a space for accommodating the inner body member, wherein the outer lid member and the inner lid member engage with a lid locking device that engages with the lid locking device. The container body is characterized in that it is provided with a plurality of either a body locking device or a lid locking receiver at predetermined intervals in the circumferential direction, the inner body member and the outer body member are provided with a plurality of either a body locking device that engages the inner body member and the outer body member and a body locking receiver that engages with the body locking device at predetermined intervals in the circumferential direction, the lid is further filled with foamed urethane, which is an insulating material, in the space sandwiched between the outer body member and the inner body member, and the container body is characterized in that it is filled with foamed urethane, which is an insulating material, in the space sandwiched between the inner body member and the outer body member.

[0007] Here, it is preferable that the lid further comprises a vacuum insulating material in the space sandwiched between the outer member of the lid and the inner member of the lid, and that the container body further comprises a vacuum insulating material in the space sandwiched between the inner member of the body and the outer member of the body.

[0008] Furthermore, the insulated box body is preferably provided with a buckle portion for fixing and sealing the closed lid to the container body, the buckle portion being hooked onto a lid projection that protrudes laterally from the lid and a body projection that protrudes laterally from the container body, the lid projection being formed by engaging the outer lid member and the inner lid member and screwing in a lid projection fixing device having a length that extends from below the inner lid member through the inner lid member to the outer lid member, and the body projection being formed by engaging the inner body member and the outer body member and screwing in a body projection fixing device having a length that extends from below the outer body member through the outer body member to the inner body member.

[0009] Furthermore, it is preferable that the outer lid member and the inner lid member are configured such that the ends of the outer lid member and the inner lid member overlap and engage, and the tip of the outer lid member becomes thinner from the portion in contact with the end of the inner lid member, and that the inner body member and the outer body member are configured such that the ends of the inner body member and the outer body member overlap and engage, and the tip of the outer body member becomes thinner from the portion in contact with the end of the inner body member.

[0010] Furthermore, the insulated box body is provided with a hinge portion that connects the lid to the container body in a manner that allows the lid to be opened and closed. Preferably, the hinge portion is screwed onto the lid by a lid hinge mounting fixture having a length that penetrates the outer member of the lid and reaches the inner member of the lid, and screwed onto the container body by a body hinge mounting fixture having a length that penetrates the outer member of the body and reaches the inner member of the body.

[0011] Furthermore, it is preferable that the inner member of the main body has a flange portion formed on its upper edge that protrudes laterally around its entire circumference, a hinge mounting portion on the back side of the flange portion for attaching the hinge portion, and hook-shaped L-shaped ribs formed integrally with the hinge mounting portion at both the left and right ends in the longitudinal direction of the hinge mounting portion.

[0012] Furthermore, the inner body member is provided with a heat insulation material holding rib that protrudes downward along the side surface of the inner body member on the back side of the flange portion, and the vacuum heat insulation material is attached to the side surface of the inner body member, and it is preferable that the heat insulation material holding rib prevents the vacuum heat insulation material attached to the side surface of the inner body member from peeling off. [Effects of the Invention]

[0013] According to the present invention, the inner and outer members constituting the lid and the container body are fixed and held around the entire circumference by the fitting of a locking device and a locking receiver. As a result, the engagement between the inner and outer members becomes strong, preventing the foamed urethane filled inside from leaking out from the engagement portion of both members, and enabling the realization of a cooler box that can fully perform its heat insulation function. [Brief explanation of the drawing]

[0014] [Figure 1] This is a perspective view and a partially cutaway view of a cooler box according to an embodiment of the present invention. [Figure 2] This is a perspective view of the back of the cooler box. [Figure 3] This diagram shows the disassembled lid of a cooler box. [Figure 4] This diagram shows the disassembled body of a cooler box. [Figure 5] This is a cross-sectional view showing the structure of the hinge. [Figure 6] This is a cross-sectional perspective view showing the structure of the buckle. [Figure 7] These are end view diagrams of each inner and outer member. [Figure 8] This diagram shows the hinge mounting portion on the inner component of the container body. [Figure 9] This is a bottom view of the lid. [Modes for carrying out the invention]

[0015] Hereinafter, as an embodiment, a cooler box will be taken as an example to describe the heat-insulating box according to the present invention.

[0016] FIG. 1 is a perspective view of a cooler box according to an embodiment of the present invention, and a view showing a part thereof broken. FIG. 2 is a perspective view of the back side of the cooler box.

[0017] The cooler box 1 of the present embodiment is a heat-insulating box having a space capable of accommodating contents therein in a heat-insulated state, and includes a lid body 2, a container body 3, a hinge portion 4, and a buckle portion 5.

[0018] The lid body 2 is a member that closes the opening of the box-shaped container body 3 with an open top surface and serves as the lid of the cooler box 1. The container body 3 is a box body that forms the main body portion of the cooler box 1. The lid body 2 and the container body 3 are pivotally attached by a hinge portion 4 and are configured to be sealed by a buckle portion 5.

[0019] As shown in FIG. 1, the lid body 2 and the container body 3 are each composed of two members, an outer member and an inner member. A heat-insulating panel such as urethane foam is laid in the space sandwiched between these two members, and foamed urethane is filled as a heat-insulating material. Since the heat-insulating panel has high heat-insulating properties, it is desirable to provide it, but it is also possible to use only the filling of foamed urethane depending on the application. These points will be described in detail below.

[0020] FIG. 3 is a view showing the lid body 2 of the cooler box 1 disassembled.

[0021] The lid body 2 is composed of two members, a lid outer member 21 located outside the lid body 2 and constituting the top surface of the cooler box 1, and a lid inner member 22 located inside the lid body 2 and closing the opening of the container body 3.

[0022] The lid 2 is constructed by fitting together a lid locking device 24, which is a claw provided at predetermined intervals around the entire circumference on the inner side of the peripheral wall of the outer lid member 21, and a lid locking receiver 25, which is a claw receiving portion provided along the outer circumference of the inner lid member 22 at a position corresponding to the lid locking device 24 and engages with the lid locking device 24. Although the lid locking receiver 25 is shown as having a hole for the claw receiving portion, it may also have a recess instead of a hole for the claw receiving portion.

[0023] A plate-shaped insulating panel, the lid vacuum insulation material 23, is laid on the upper surface of the inner lid member 22. This lid vacuum insulation material 23 provides insulation from above for the contents housed inside the container body 3.

[0024] The space between the outer lid member 21 and the inner lid member 22 is a foamed urethane filling section 6, in which the lid vacuum insulation material 23 is placed and foamed urethane, which is the insulation material, is filled. Even when urethane is filled into the foamed urethane filling section 6 and foamed, the outer lid member 21 and the inner lid member 22 are fixed and held in place around their entire circumference by the fitting of the lid locking device 24 and the lid locking receiver 25, so that no gaps are created in the engagement portion between the outer lid member 21 and the inner lid member 22 and the urethane does not leak out.

[0025] Furthermore, one longitudinal side of the inner lid member 22 is provided with a lid hinge mounting portion 26 for attaching the hinge portion 4, and the opposite side is provided with a lid buckle projection 27b for attaching the buckle portion 5. The outer lid member 21 is also provided with a lid buckle projection 27a, and the lid buckle projection 27a of the outer lid member 21 and the lid buckle projection 27b of the inner lid member 22 are combined to form the hook portion of the buckle portion 5. The lid buckle projections 27a and 27b will be described in more detail later.

[0026] Figure 4 shows the container body 3 of the cooler box 1 disassembled.

[0027] The container body 3 is composed of two members: an inner body member 30 located inside the container body 3, with an open top surface and a space for accommodating contents, and an outer body member 32 located outside the container body 3, with an open top surface and a space for accommodating the inner body member 30.

[0028] The inner body member 30 has a flange portion 31 formed around its entire circumference, which is a part that protrudes laterally from its upper edge. Multiple body locking devices 34, which are claws, are provided on the inside of the peripheral wall of this flange portion 31 at predetermined intervals around its entire circumference.

[0029] The outer member 32 of the main body is provided with a main body locking receiver 35, which is a claw receiving portion that engages with the main body locking device 34, at its upper edge in a position corresponding to the main body locking device 34.

[0030] By fitting the main body locking device 34 and the main body locking receiver 35 together, the main body inner member 30 and the main body outer member 32 are combined to form the container body 3.

[0031] Furthermore, a plate-shaped insulation panel, the main body vacuum insulation material 33, is laid on all sides and the bottom of the main body inner member 30. Because the main body vacuum insulation material 33 is attached around the entire circumference except for the top surface, it works in conjunction with the lid vacuum insulation material 23 of the lid inner member 22 to provide insulation in all directions for the contents housed inside the container body 3.

[0032] The space between the inner body member 30 and the outer body member 32 also becomes a foamed urethane filled section 6. Similar to the lid 2 described above, the main body vacuum insulation material 33 is placed in this space and filled with foamed urethane, which is the insulation material. And, similar to the lid 2 described above, the inner body member 30 and the outer body member 32 are fixed and held in place around their entire circumference by the fitting of the main body locking device 34 and the main body locking receiver 35, so that the urethane in the foamed urethane filled section 6 does not leak out from the engagement portion between the inner body member 30 and the outer body member 32.

[0033] Furthermore, one longitudinal side of the inner body member 30 is provided with a main body hinge mounting portion 36 for attaching the hinge portion 4, and the opposite side is provided with a main body buckle projection 37a for attaching the buckle portion 5. The outer body member 32 is also provided with a main body buckle projection 37b, and the main body buckle projection 37b of the outer body member 32 and the main body buckle projection 37a of the inner body member 30 are combined to form the hook portion of the buckle portion 5. The main body buckle projection 37a and the main body buckle projection 37b will be described in more detail later.

[0034] On the back side of the flange portion 31 formed on the upper edge of the main body inner member 30, an insulation material holding rib 38 is provided that protrudes downward along the side surface of the main body inner member 30. This insulation material holding rib 38 is a rib for holding the main body vacuum insulation material 33 attached to the side surface of the main body inner member 30, that is, a rib that prevents the main body vacuum insulation material 33 from peeling off from the side surface of the main body inner member 30. The main body vacuum insulation material 33 is fixed to the side surface of the main body inner member 30 with an adhesive such as hot melt, but a small gap is created between the side surface of the main body inner member 30 and the main body vacuum insulation material 33. When urethane is filled into the foamed urethane filling section 6 and foamed, there is a risk that the urethane may get into this gap and peel the main body vacuum insulation material 33 off the side surface of the main body inner member 30. Even if it does not peel off, there is a risk that the main body vacuum insulation material 33 will be shifted from its proper position and will not be able to perform its original insulation function. Furthermore, when urethane is filled from the bottom of the container body and foamed, the corner formed by the side of the inner body member 30 and the flange portion 31 is where the most pressure is applied, making it highly likely that the main body vacuum insulation material 33 will peel off from the side of the inner body member 30 at that point. Therefore, by providing multiple insulation material holding ribs 38 on the back side of the flange portion 31 near the corner formed by the side of the inner body member 30 and the flange portion 31, the main body vacuum insulation material 33 is prevented from lifting and peeling off from the side of the inner body member 30.

[0035] Thus, the lid 2 is fixed and held in place around its entire circumference by the fitting of the outer lid member 21 and the inner lid member 22 between the lid locking device 24 and the lid locking receiver 25, and the container body 3 is fixed and held in place around its entire circumference by the fitting of the inner body member 30 and the outer body member 32 between the body locking device 34 and the body locking receiver 35. In this manner, the urethane in the foamed urethane filling section 6 does not leak out from the engagement portions of the two members.

[0036] The fitting of the lid locking device 24 and the lid locking receiver 25, and the fitting of the main body locking device 34 and the main body locking receiver 35, also serve as temporary fastening before filling the foamed urethane filling section 6 between the two members with urethane. When the filled urethane is foamed, the lid locking device 24 and the main body locking device 34 move toward the lid locking receiver 25 and the main body locking receiver 35, respectively, acting to make the engagement between the two members stronger.

[0037] In addition, the cooler box 1 of this embodiment is equipped with the following configuration to further strengthen the engagement between the two components and more reliably prevent leakage of urethane.

[0038] Figure 5 is a cross-sectional view showing the configuration of the hinge portion 4.

[0039] The hinge portion 4 is a hinge that connects the lid 2 and the container body 3 in a state where the lid 2 can be opened and closed, and is attached and fixed to the lid 2 and the container body 3 with screws. First, the hinge portion 4 is screwed into the lid 2 by a hinge mounting fitting 41, which is a screw that has a length that passes through the outer member 21 of the lid 2 and reaches the hinge mounting portion 26 of the inner member 22 of the lid. The hinge portion 4 is also screwed into the container body 3 by a hinge mounting fitting 42, which is a screw that has a length that passes through the outer member 32 of the container body 3 and reaches the hinge mounting portion 36 of the inner member 30 of the container body.

[0040] In this way, by fixing the hinge portion 4 together with the two components that make up the lid 2 and the container body 3, the fitting portions of each of the two components are reinforced, so that when urethane is filled into the foamed urethane filling portion 6 and foamed, leakage of urethane from the engaging portion of the two components and distortion of the cooler box 1 can be prevented.

[0041] The lid hinge mounting portion 26, which is a rib that receives the hinge mounting fixture 41, has a lid hinge mounting base 26a on the base side of the inner lid member 22. The main body hinge mounting portion 36, which is a rib that receives the hinge mounting fixture 42, has a main body hinge mounting base 36b on the base side of the inner body member 30. These lid hinge mounting bases 26a and main body hinge mounting bases 36b are bases provided to increase the height of the hinge portion 4. The lid hinge mounting bases 26a and main body hinge mounting bases 36b are hollowed out in the direction of mold removal. This is because it is sufficient to secure the total height of the lid hinge mounting portion 26 and main body hinge mounting portion 36 in order to increase the height of the hinge portion 4, and to avoid wasting the resin used in their construction.

[0042] Figure 6 is a cross-sectional perspective view showing the configuration of the buckle portion 5.

[0043] The buckle portion 5 is a fastener for securing and sealing the closed lid 2 to the container body 3. The lid buckle projection 27a of the outer lid member 21 and the lid buckle projection 27b of the inner lid member 22 are combined to form the hook portion of the buckle portion 5 on the lid 2 side, and the body buckle projection 37a of the inner body member 30 and the body buckle projection 37b of the outer body member 32 are combined to form the hook portion of the buckle portion 5 on the container body 3 side.

[0044] At this time, the lid buckle projection 27a and the lid buckle projection 27b are screwed together by a buckle projection fixing device 51, which is a screw that extends from below the lid buckle projection 27b through the lid buckle projection 27b to the lid buckle projection 27a, thereby forming the hook portion of the buckle portion 5 on the lid 2 side. In addition, the body buckle projection 37a and the body buckle projection 37b are screwed together by a buckle projection fixing device 52, which is a screw that extends from below the body buckle projection 37b through the body buckle projection 37b to the body buckle projection 37a, thereby forming the hook portion of the buckle portion 5 on the container body 3 side.

[0045] In this way, the protrusions formed horizontally from the two members that make up the lid 2 and the container body 3 serve as the hooks for the buckle 5, and these protrusions are fixed vertically, so that the engagement between the two members becomes stronger, and a cooler box 1 is obtained in which urethane does not leak out or distortion occurs from the engagement part of the two members.

[0046] Figure 7 shows end views of each inner and outer member.

[0047] As shown in Figure 7, the outer lid member 21 and the inner lid member 22 are configured so that their respective ends partially overlap, and the inner body member 30 and the outer body member 32 are also configured so that their respective ends partially overlap.

[0048] Furthermore, the tip of the outer lid member 21 is configured to become thinner from the portion in contact with the inner lid member end 28, which is the end of the inner lid member 22, and the tip of the outer body member 32 is configured to become thinner from the portion in contact with the inner body member end 39, which is the end of the inner body member 30. By changing the angle of the end of the outer member in this way so that the outer member contacts the end of the inner member, when the end of the outer member bulges outward during urethane foaming, the clearance between the contact surface of the outer member and the end of the inner member is made as close to zero as possible, thereby preventing urethane from leaking out from the engagement portion of the two members.

[0049] Figure 8 shows the main body hinge mounting portion 36 on the inner body member 30 of the container body 3.

[0050] On the back side of the flange portion 31 of the inner member 30 of the main body, a main body hinge mounting portion 36 is provided for attaching the hinge portion 4. At both the left and right ends in the longitudinal direction of this main body hinge mounting portion 36, hook-shaped L-shaped ribs 36a are provided extending from the main body hinge mounting portion 36. These L-shaped ribs 36a are integrally formed with the main body hinge mounting portion 36 and constitute a continuous wall portion with the main body hinge mounting portion 36.

[0051] When the inner body member 30 and the outer body member 32 are combined, there is a gap between the inner body member 30 and the outer body member 32 near the hinge mounting portion 36 of the main body. When urethane is filled and foamed, urethane may leak out through this small gap. Therefore, by covering the gap with the L-shaped rib 36a and preventing the pressure of the urethane from being applied towards the gap, urethane leakage can be prevented.

[0052] Figure 9 is a bottom view of the lid 2.

[0053] A mesh-like retaining section is formed on the bottom surface of the lid 2, that is, on the surface facing the opening of the container body 3. This section consists of a rubber band 29a, a hook 29b to which the rubber band 29a is attached, and string fasteners 29c and 29d. A cooling pack can be placed in this retaining section, making it possible to keep the contents inside the container body 3 cool. Note that the retaining section for holding the cooling pack on the bottom surface of the lid 2 is not limited to a mesh shape; for example, it may be a pocket-like structure into which the cooling pack can be inserted and removed.

[0054] As described above, the cooler box according to this embodiment is constructed by engaging two members, an inner member and an outer member, for the lid and the container body, and filling the space between the inner member and the outer member with foamed urethane. Since the inner member and the outer member that make up the lid and the container body are fixed and held in place around the entire circumference by fitting together a locking device and a locking receiver, the engagement between the inner member and the outer member becomes strong, preventing the foamed urethane filled inside from leaking out from the engagement portion of both members, and realizing a cooler box that can fully exhibit its heat insulation function.

[0055] Although the heat-insulating box according to the present invention has been described above based on embodiments, the present invention is not limited thereto. Various design modifications are possible as long as they achieve the objectives of the present invention and do not depart from the gist of the invention, and all of these are also included within the scope of the present invention.

[0056] For example, in the above embodiment, a claw and a claw receiver were exemplified as the locking device and locking receiver for the inner and outer members, but other types of locking devices and locking receivers may also be used. In any other configuration, it is preferable that the locking device and locking receiver engage firmly and easily, so fitting mechanisms such as eyelets are preferred. Alternatively, the locking receiver may be provided on the inner member and the locking device on the outer member. [Industrial applicability]

[0057] The insulated box according to the present invention is suitable for cooler boxes and the like that have an insulating function. [Explanation of Symbols]

[0058] 1. Insulated box 2 Lid 3. Container body 4. Hinge section 5. Buckle part 6. Polyurethane foam filling section 21 Lid outer member 22 Inner member of the lid 23. Vacuum insulation material for the lid 24 Lid locking mechanism 25 Lid locking receiver 26. Lid hinge mounting section 26a Base for mounting hinge on the lid 27a, 27b Cover buckle protrusion 28 End of inner member of lid 29a Elastic cord 29b Hook 29c, 29d Cord fastener 30. Inner components of the main body 31 Flange section 32 Main body outer member 33. Main body vacuum insulation material 34 Main body locking device 35 Main body locking receiver 36 Main body hinge mounting section 36a L-shaped rib 36b Base for mounting hinge on the main body 37a, 37b Main body buckle protrusion 38 Insulation material holding ribs 39 Body outer member end 41,42 Hinge mounting hardware 51, 52 Buckle protrusion fastener

Claims

1. An insulated box body comprising a box-shaped container body with an open top and a lid that closes the opening of the container body, The lid comprises an outer lid member that forms the top surface of the insulated box body and an inner lid member that closes the opening of the container body. The container body comprises an inner body member having an open top surface and a space capable of accommodating contents, and an outer body member having an open top surface and a space for accommodating the inner body member. The outer lid member and the inner lid member are each provided with a plurality of either a lid locking device for engaging the outer lid member and the inner lid member, and a lid locking receiver for engaging the lid locking device, at predetermined intervals in the circumferential direction. The inner body member and the outer body member are each provided with a plurality of either a body locking device that engages the inner body member and the outer body member, and a body locking receiver that engages with the body locking device, at predetermined intervals in the circumferential direction. The lid is formed by filling the space between the outer lid member and the inner lid member with polyurethane foam, which is an insulating material. The container body is filled with foamed urethane, which is an insulating material, in the space sandwiched between the inner member and the outer member of the body. The aforementioned insulated box body is It is equipped with a buckle that secures and seals the closed lid to the container body, The buckle portion is hooked onto a lid projection that protrudes laterally from the lid and a body projection that protrudes laterally from the container body. The lid projection is formed by engaging the outer lid member and the inner lid member, and by screwing in a lid projection fixing device having a length that extends from below the inner lid member through the inner lid member to the outer lid member. The main body projection is formed by engaging the main body inner member and the main body outer member, and by screwing in a main body projection fixing device that has a length extending from below the main body outer member through the main body outer member to the main body inner member. A thermal insulation box characterized by the following features.

2. The lid further comprises a vacuum insulation material, which is a plate-shaped insulation panel, in the space sandwiched between the outer member of the lid and the inner member of the lid. The container body further includes a vacuum insulation material, which is a plate-shaped insulation panel, in the space sandwiched between the inner member and the outer member of the body. The insulated box body according to feature 1.

3. The outer lid member and the inner lid member are configured such that the ends of the outer lid member and the inner lid member overlap and engage, and the tip of the outer lid member is configured to become thinner from the portion in contact with the end of the inner lid member. The inner and outer members of the main body are configured such that the ends of the inner and outer members overlap and engage with each other, and the tip of the outer member becomes thinner from the portion in contact with the end of the inner member. The heat-insulating box according to feature 1 or 2.

4. The aforementioned insulated box body is The lid is provided with a hinge that connects the lid and the container body in a manner that allows the lid to be opened and closed. The aforementioned hinge portion is, The lid hinge mounting fixture, which has a length that penetrates the outer member of the lid and reaches the inner member of the lid, is screwed onto the lid. The main body hinge mounting fixture, which has a length that penetrates the outer main body member and reaches the inner main body member, is screwed into the container body. The heat-insulating box according to any one of claims 1 to 3.

5. The inner member of the main body includes a flange portion formed on its upper edge that protrudes laterally around its entire circumference, a hinge mounting portion on the back side of the flange portion for attaching the hinge portion, and hook-shaped L-shaped ribs formed integrally with the hinge mounting portion at both the left and right ends in the longitudinal direction of the hinge mounting portion. The heat-insulating box according to feature 4.

6. The inner body member is provided with a heat insulation material holding rib that protrudes downward along the side surface of the inner body member on the back side of the flange portion. Vacuum insulation material is attached to the side surface of the inner member of the main body, and the insulation material holding ribs prevent the vacuum insulation material attached to the side surface of the inner member of the main body from peeling off. The heat-insulating box according to feature 5.

Images