CN210971927U - Foldable box - Google Patents

Abstract

The application discloses a collapsible case. The foldable box has a box body and a box cover, wherein the box body has a base and a pair of opposing first side panels and a pair of opposing second side panels foldably connected to the base. One edge of the box cover is hinged at the top end of the box body. Every in first curb plate, second curb plate and the case lid forms by inner panel and planking mutual welding, is equipped with the heat preservation between inner panel and the planking. The base is provided with a plate-shaped body and a protective edge extending upwards from the periphery of the plate-shaped body, and heat-insulating layers are arranged in the plate-shaped body and the protective edge. The utility model provides a folding box still has fine thermal insulation performance when realizing folding function.

Description

Foldable box

Technical Field

The utility model relates to a container, concretely relates to collapsible case.

Background

When the container is used for loading fresh foods such as vegetables and fruits, particularly when cold chain transportation is needed, the relative sealing of the container is particularly important, and the fresh foods are easy to pollute by the external environment during transportation, so that the foods are corroded and deteriorated. However, most of the existing containers, which are generally containers without lids, have fresh food loaded into the containers, and the tops of the containers are generally open, so that the food is very vulnerable to external conditions. The existing container with the cover can not be folded, and is very inconvenient to store and transport.

Another container for holding fresh vegetables and fruits is an incubator. The existing insulation can is mainly composed of a case cover and an unfolded case body, the case cover and a case body of the insulation can in the form a cavity inside the thickness of the side wall of a container through plastic suction, blow molding and rotational molding, insulation materials are filled in a preformed hole in the body, an insulation can solution is formed, and the main existing problem points are as follows:

first, a container body formed by blister, blow molding and rotational molding processes is generally unfolded (because a gap between folded side plates cannot be solved, energy exchange generated by the gap between the inside and the outside of the heat insulation box cannot be prevented), so that the unfolded container body occupies a large space in the recycling process, and bears high recycling cost for the distribution industry. Secondly, the container body formed by the processes of plastic suction, blow molding and rotational molding has single requirement on the corresponding product structure, and compared with the hinge structure and the meshing structure (structures corresponding to the inclined top, the collision and penetration and the like of the mold) which can be formed by a conventional injection mold, the processes of plastic suction, blow molding and rotational molding are difficult to realize (process limiting structures), so that the insulation box body formed by the processes of plastic suction, blow molding and rotational molding has low reliability, short service life and high maintenance cost in the transportation process due to the lack of a stable meshing or hinging structure.

Secondly, the cavity inside the side wall thickness of the container is formed by plastic suction, blow molding and rotational molding and is filled with a heat insulation material (generally polyurethane foam), the container body is generally engineering plastic and has water absorption and air permeability, and a foaming agent in the polyurethane can be continuously replaced with air or moisture in the environment due to diffusion (the heat insulation box is used for cold chain transportation, has large humidity and temperature difference and higher replacement rate), so that the heat conductivity coefficient is gradually increased along with time, and finally, the heat insulation effect is reduced. Moreover, the insulation can is repeatedly used as cold chain transportation, and the polyurethane foam also becomes a carrier for bacterial breeding, so that potential safety and sanitation hazards exist. Secondly, as the most widely used thermal insulation material, polyurethane foam is usually used as a chemical foaming (adding a chemical foaming agent (or gas) to molten plastic) foaming agent, and the gases released by the foaming agent during heating include carbon dioxide, nitrogen, ammonia, etc., and the whole polyurethane foam industry chain is a process polluting the environment. In addition, the polyurethane foam can be degraded or cracked in a complex process, and the existing method adopts incineration to generate a large amount of toxic gas, so that the environmental pollution is large.

Accordingly, there is a need in the art for a lidded collapsible container that is both relatively secure in an unfolded, upright position and that is conveniently collapsible for storage when not in use.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a collapsible container, this collapsible container is equipped with single flip, folds and accomodates flip in base safe edge when idle, can also guarantee preferably that the container is closed relatively under the state of expanding upright.

In order to achieve the above object, the present invention provides a foldable box having a box body and a box cover, wherein the box body has a base and a pair of opposite first side plates and a pair of opposite second side plates foldably connected to the base, an edge of the box cover is operably connected to the top end of the box body, wherein the first side plates, the second side plates and at least one of the box cover are formed by interconnecting inner plates and outer plates, the inner plates and the outer plates are provided with a heat preservation layer therebetween.

In one embodiment, each of the first side plate, the second side plate and the box cover is formed by connecting an inner plate and an outer plate.

In one embodiment, one edge of the box cover is hinged to the top end of the box body.

In one embodiment, the base comprises a plate-shaped body and a protective edge extending upwards from the periphery of the plate-shaped body, and the plate-shaped body and the protective edge are both internally provided with an insulating layer.

In one embodiment, the inner plate and the outer plate are welded to each other.

In one embodiment, at least one welding rib is arranged on the inner side of the outer periphery of one of the inner plate and the outer plate.

In one embodiment, two welding ribs spaced apart from each other are provided on the inner side of the outer periphery of one of the inner plate and the outer plate.

In one embodiment, a cavity for accommodating an insulating layer is formed between the surface of the inner plate and the surface of the outer plate, and the surfaces of the inner plate and the outer plate facing the cavity and defining the cavity are flat surfaces or the surfaces of the inner plate and the outer plate facing the cavity and defining the cavity are provided with at least one reinforcing rib.

In one embodiment, a cavity for accommodating an insulation layer is formed between the surface of the inner plate and the surface of the outer plate, and at least one reinforcing rib is arranged on the surfaces of the inner plate and the outer plate facing the cavity and defining the cavity, wherein the at least one reinforcing rib is spaced apart from each other and from the welding rib.

In one embodiment, at least one welding rib is arranged on the inner side of the outer periphery of one of the inner plate and the outer plate, and the reinforcing rib is parallel to the welding rib.

In one embodiment, a cavity for accommodating an insulating layer is formed between the surface of the inner panel and the surface of the outer panel, the surfaces of the inner panel and the outer panel of the second side panel facing the cavity and defining the cavity are flat surfaces, or the surfaces of the inner panel and the outer panel of the box cover and the first side panel facing the cavity and defining the cavity are provided with at least one reinforcing rib.

In one embodiment, a cavity for accommodating an insulation layer is formed between the surface of the inner plate and the surface of the outer plate, and at least one reinforcing rib is arranged on the surfaces of the inner plate and the outer plate facing the cavity and defining the cavity, wherein the at least one reinforcing rib is spaced apart from each other and from the welding rib.

In one embodiment, at least one welding rib is arranged on the inner side of the outer periphery of one of the inner plate and the outer plate, and the reinforcing rib is parallel to the welding rib.

In one embodiment, the outer panel at one pair of opposing edges of the lid extends beyond the edge of the inner panel, one of the other pair of opposing edges is provided with a lid hinge, and the outer panel at the other edge is flush with the inner panel or also extends beyond the edge of the inner panel.

In one embodiment, the box cover is hinged to one of a pair of opposite first side plates, and a groove with an upward opening and facing the inside of the box body is formed in the inner side of the top end of the other of the pair of opposite first side plates; or the top end of the inner side of the other one of the pair of opposite first side plates is provided with a groove with an upward opening, the outer plate at the other edge of the box cover opposite to the edge provided with the box cover hinge part is provided with a clamping edge, and the clamping edge is operatively clamped into the groove.

In one embodiment, the top of the first side plate and the second side plate is provided with a closed cavity.

In one embodiment, the left end and the right end of the first side plate and the second side plate are both provided with a side plate engaging portion, and the bottom ends of the first side plate and the second side plate are provided with a hinge extending portion, wherein the side plate engaging portion and the hinge extending portion are integrally formed on the side plates.

In one embodiment, the side panel engaging portion and the hinge extension are integrally formed on the side panel.

In one embodiment, the base is formed by welding a base main body and a bottom plate.

In one embodiment, the base body is provided with a plate-like body cavity and two pairs of opposing edge guard cavities, wherein the plate-like body cavity and the edge guard cavities are spaced apart from each other.

In one embodiment, the protective edge is provided with a plurality of cavities which are opened upwards and face the interior of the box body and are spaced from each other, and an insulating layer is arranged between the cavities in the protective edge.

In one embodiment, the first edge of the lid is hingedly connected to the top end of one of the pair of first side panels by a hinge, the first edge of the lid is provided with a lid hinge and the top end of one of the pair of first side panels is provided with a side panel hinge, wherein the first and second edges of the hinge are provided with first and second body hinges, respectively, the lid hinge and the first body hinge are hingedly connected to each other and the side panel hinge and the second body hinge are hingedly connected to each other, wherein the underside of the hinge is connected to a hinge seal, the first side of the hinge seal being operatively abutted against the first side panel.

In one embodiment, at least a portion of a second side of the hinge seal opposite the first side overlaps the seal on the cover.

In one embodiment, the second side plate has a plate-shaped main body and a plurality of hinge extensions extending from a lower portion of the plate-shaped main body and spaced apart from each other, a bottom end of each hinge extension is provided with a side plate hinge, and left and right side edges of the plate-shaped main body and the side plate hinges are provided with seals.

In one embodiment, each of the side panel hinges is provided with a separate seal.

In one embodiment, the left and right side edges of the plate-shaped main body of the second side plate are provided with side plate engaging portions, and side plate sealing members are connected to the side plate engaging portions and extend beyond the side plate engaging portions.

In one embodiment, the insulation layer is made of a plate material.

In one embodiment, the heat-insulating layer is formed by combining composite material layers with different functions.

In one embodiment, a first edge of the cover is hinged to a top end of one of the pair of first side plates by a hinge, the cover is provided with a cover hinge along the first edge, and a top end of one of the pair of first side plates is provided with a side plate hinge, wherein a first edge and a second edge of the hinge are respectively provided with a first body hinge and a second body hinge, the cover hinge and the first body hinge are hinged to each other, and the side plate hinge and the second body hinge are hinged to each other.

In one embodiment, the hinge is a separate member from the case and the lid, and the lid hinge is disposed only along a first edge of the lid.

In one embodiment, the size of the assembly formed by the hinge and the lid hinged to each other matches the size of the opening of the foldable box.

In one embodiment, the first body hinge of the hinge is provided with a plurality of grooves spaced apart from one another along a first edge, wherein at least a portion of the lid hinge of the lid is positioned within the grooves.

In one embodiment, the width of the hinge and the lid is such that when the lid is folded over the outer side of the side panel, the edge of the lid does not extend beyond the bottom end of the side panel.

In one embodiment, the cover has a plate-like body, and the other edges of the cover except for the first edge operatively overlap the top ends of the first side panel and the second side panel, respectively.

In one embodiment, the lid hinge comprises a plurality of lid extensions spaced apart from one another, each lid extension provided with a hinge hole; the side panel hinge portion comprises a plurality of side panel extensions spaced apart from one another, each side panel extension being provided with a hinge aperture; the first and second body hinges respectively comprising a plurality of first and second body extensions spaced apart from one another, each of the first and second body extensions being provided with a hinge aperture; wherein a first hinge shaft passes through a hinge hole of the cover extension and a hinge hole of the first main body extension, and a second hinge shaft passes through a hinge hole of the second main body extension and a hinge hole of the side plate extension.

In one embodiment, the lid hinge comprises a plurality of lid extensions spaced apart from one another, the side panel hinge comprises a plurality of side panel extensions spaced apart from one another, and the first and second body hinges each comprise a plurality of first and second body extensions spaced apart from one another; one of the box cover extension part and the first main body extension part is provided with a hinge shaft, and the other one of the box cover extension part and the first main body extension part is provided with a hinge hole matched with the hinge shaft; one of the side plate extension part and the second main body extension part is provided with a hinge shaft, and the other one of the side plate extension part and the second main body extension part is provided with a hinge hole matched with the hinge shaft.

In one embodiment, one of the two pairs of opposite side plates is a long side plate with a longer length, the other pair of side plates is a short side plate with a shorter length, and the box cover is hinged to the top end of one of the long side plates.

In one embodiment, the base is provided with a plate-shaped main body and a pair of opposite protecting edges extending upwards from a pair of opposite edges of the plate-shaped main body, the protecting edges are provided with cavities with upward and inward openings, the upper parts of the end walls on two sides of each cavity are provided with first base limiting bulges, the middle part of each cavity is provided with a base limiting part integrally extending upwards from the bottom wall of each cavity, and a base guiding part which is positioned in each base limiting part and opens towards the inside; the bottom end of the long side plate is provided with a plurality of hinge extending parts which are spaced from each other, and the bottom end of each hinge extending part is provided with a side plate hinge shaft and a side plate guide part between the side plate hinge shafts; the side plate hinge shaft is matched with the first limiting protrusion and the base limiting part, and the side plate guide part is matched with the base guide part.

In one embodiment, the lid is further provided with a locking mechanism for locking the lid to the side panel, the locking mechanism being provided in the other half than the half in which the lid hinge is provided.

In one embodiment, the joint between the box cover and the first side plate and the second side plate, the joint between the base and the first side plate and the second side plate, and the joint between the first side plate and the second side plate are provided with sealing elements.

In one embodiment, the seal between the lid and the first and second side panels is disposed at the bottom periphery of the lid and is fixedly attached to the lid.

In one embodiment, the cover is formed by welding an inner plate and an outer plate to each other, the outer plate at one pair of opposite edges of the cover extends out of the edge of the inner plate, one edge of the other pair of opposite edges is provided with a cover hinge portion, the outer plate and the inner plate at the other edge are flush, and a sealing element on the cover is connected to the inner plate.

In one embodiment, the lid is further configured such that, in a state in which the lid is closed, a portion of the outer panel of the lid extending beyond the edge of the inner panel overlaps the second side panel.

In one embodiment, the seal of the lid is a ring having two opposing pairs of sides, one pair of opposing sides of the seal of the lid extending beyond the outer edge of the inner panel of the second side panel, one of the other pair of opposing sides being operatively abutted against the first side panel.

In one embodiment, the lid is hinged to one of a pair of opposing first side plates, the other of the pair of opposing first side plates having a groove on an inside of a top end thereof opening upwardly and toward an interior of the box, a portion of the seal of the lid being operatively abutted against the groove.

In one embodiment, the seal of the lid has a seal body and at least one row of mounting posts projecting from the seal body, the posts terminating in snaps, and the lid having corresponding mounting holes into which the snaps snap fit.

In one embodiment, the first edge of the lid is hingedly connected to the top end of one of the pair of first side panels by a hinge, the first edge of the lid is provided with a lid hinge and the top end of one of the pair of first side panels is provided with a side panel hinge, wherein the first and second edges of the hinge are provided with first and second body hinges, respectively, the lid hinge and the first body hinge are hingedly connected to each other and the side panel hinge and the second body hinge are hingedly connected to each other, wherein the underside of the hinge is connected to a hinge seal, the first side of the hinge seal being operatively abutted against the first side panel.

In one embodiment, a second side of the hinge seal opposite the first side overlaps the seal on the cover.

In one embodiment, the left and right side edges of the plate-shaped main body of the second side plate are provided with side plate engaging portions, and side plate sealing members are connected to the side plate engaging portions and extend beyond the side plate engaging portions.

In one embodiment, the side plate seal has an elongated plate-like body with a plurality of protrusions spaced apart from one another, and the side plate engaging portion has corresponding recesses to which the protrusions of the elongated plate-like body are operatively secured.

In one embodiment, each of the first side plate and the second side plate has a plate-shaped body and a plurality of hinge extensions extending from a lower portion of the plate-shaped body and spaced apart from each other, the base has a plate-shaped body and two pairs of opposite protection edges extending upward from two pairs of opposite edges of the plate-shaped body, the protection edges are provided with cavities opening upward and facing the inside of the box body, wherein the hinge extensions are provided with seals and/or the cavities of the base are provided with seals.

In one embodiment, the seals mounted to the hinge extensions are located on and extend beyond the left and right sides and underside of the hinge extensions.

In one embodiment, the left and right side edges of the plate-shaped body of the second side plate are provided with sealing members.

In one embodiment, a separate seal is attached to each of the hinge extensions.

In one embodiment, the base is provided with a plate-shaped main body and a pair of opposite protecting edges extending upwards from a pair of opposite edges of the plate-shaped main body, the protecting edges are provided with cavities with openings facing upwards and facing the interior of the box body, and the middle part of each cavity is provided with a base limiting part integrally extending upwards from the bottom wall of the corresponding cavity; the first side plate and the second side plate are respectively provided with a plate-shaped main body and a plurality of hinge extending parts extending from the lower part of the plate-shaped main body and spaced from each other, sealing parts are mounted on the left side edge and the right side edge of the plate-shaped main body of the first side plate and/or the second side plate, a side plate hinge shaft is arranged at the bottom end of each hinge extending part, the side plate hinge shafts are matched with the base limiting parts, and the sealing parts mounted on the hinge extending parts are located on the left side and the lower side of the hinge extending parts and extend out of the left side and the lower side of the hinge extending parts.

In one embodiment, the left and right edges of the sealing member mounted to the hinge extension are provided with vertical grooves and/or the lower edge is provided with a transverse groove.

In one embodiment, the protective edge is further provided with a base guide portion located in the base limiting portion and facing the inner opening, each hinge extension portion is further provided with a side plate guide portion located between the side plate hinge shafts, and the side plate guide portions are connected to the base guide portion in a vertically sliding manner.

In one embodiment, the base limiting portion is a plate-shaped portion, the base guiding portion is a groove formed in the middle of the base limiting portion, and first base limiting protrusions are arranged on the upper portions of the two side walls of the cavity.

In one embodiment, the hinge extension has a plate-shaped body, the side plate hinge shafts extend from left and right sides of a bottom end of the plate-shaped body in a direction parallel to the side plates, and the side plate guide is a guide block extending from the plate-shaped body in a direction perpendicular to the plate-shaped body.

In one embodiment, each of the first side plate, the second side plate and the box cover is formed by welding an inner plate and an outer plate, and a heat insulation layer is arranged between the inner plate and the outer plate; and the base is provided with a plate-shaped body and a protective edge extending upwards from the periphery of the plate-shaped body, and heat-insulating layers are arranged in the plate-shaped body and the protective edge.

The utility model provides a folding box still has fine thermal insulation performance when realizing folding function. Further, the folding box of this application, through the connection of interior outer board, the inside cavity that forms plate insulation material and pack reaches the adiabatic purpose of heat preservation container through plate packing, and its advantage lies in, can be through the packing of non-foaming injection mode, and its filler material has great selection dimension, compares in the polyurethane foaming, the utility model discloses can adopt combined material, can set up different functional layer complex in plate insulation material of an organic whole to energy transfer main path (radiation, conduction and convection). Through the utility model discloses (interior planking + platelike spare insulation material combination) make filling material not injectd by the technology, have more extensive selection flexibility. In addition, no pollutant is generated in the production link, and the materials can be recycled.

Drawings

Figure 1 is a perspective view of a collapsible container according to the present invention.

Figure 2 is an exploded perspective view of the side panels, hinges and lid of the foldable box according to the present invention.

Fig. 3 is a perspective view of the foldable box according to the present invention in a folded state.

Fig. 3A is an enlarged view of detail a in fig. 3.

Fig. 3B is an enlarged view of detail B in fig. 3.

Figure 4 is a perspective view of the foldable box according to the present invention with a pair of side panels removed.

Fig. 4A is an enlarged view of detail a in fig. 4.

Fig. 4B is an enlarged view of detail B in fig. 4.

Fig. 5 is a perspective view of the lid folded outwardly relative to the side panels.

Fig. 5A is an enlarged view of detail a in fig. 5.

Fig. 6A is a perspective view of a pair of opposing side panels of a collapsible container folded relative to a base, according to the present invention.

Figure 6B is a perspective view of a side panel of a collapsible container according to the present invention.

Figure 6C is a schematic view of a foldable box according to the present invention with the side panels disengaged from the base.

Fig. 6D is an enlarged view of detail D in fig. 6C.

Figure 7 is a partially exploded perspective view of a collapsible container according to the present invention with a pair of opposing side panels folded over the base.

Figure 8 is a partial cross-sectional view of the side panels in an upright position relative to the base with the hinge section broken away.

Fig. 8A is an enlarged view of detail a of fig. 8.

Figure 9 is a vertical perspective view of a collapsible box provided with insulation.

Fig. 9A and 9B are enlarged views of details a and B of fig. 9, respectively.

Figure 10 is a partially cut-away exploded perspective view of the base of the collapsible container according to the present invention.

Fig. 10A is an enlarged view of detail a of fig. 10.

Figure 11 is a partially cut-away exploded perspective view of a side panel of a foldable box according to the present invention.

Fig. 11A is an enlarged view of detail a of fig. 11.

Fig. 12 is a partially cut-away exploded perspective view of the lid of the foldable box according to the present invention.

Fig. 12A is an enlarged view of detail a of fig. 12.

Fig. 13 is a partially cut-away perspective view of the foldable box according to the present invention, wherein the intersection of the two side panels and the box cover is cut open.

Fig. 13A is an enlarged view of detail a of fig. 13.

Figure 14 is another partially cut-away perspective view of a foldable box according to the present invention, wherein the intersection of the two side panels and the base is cut away. .

Fig. 14A is an enlarged view of detail a of fig. 14.

Figure 15 is a further partially cut-away perspective view of the foldable box according to the present invention, with the bottom ends of the side panels broken away.

Fig. 15A is an enlarged view of detail a of fig. 15.

Figure 16 is a partial cut away view of a side panel of a foldable box according to the present invention with the hinge extensions broken away.

Fig. 16A is an enlarged view of detail a of fig. 16.

Figure 17 is a perspective view of a side panel and its seal of a collapsible container according to the present invention.

Figure 18 is a perspective view of the other side panel of the collapsible container and its seal according to the present invention.

Figure 19 is a perspective view of a lid and its seal for a collapsible container according to the present invention.

Fig. 20 is a partially cut-away perspective view of a foldable box according to the present invention.

Fig. 20A is an enlarged view of detail a of fig. 20.

Fig. 20B is an enlarged view of detail B of fig. 20.

Fig. 21 is a perspective view of a hinge and its seal.

Fig. 22 is a perspective view of the hinge assembly assembled with its seal.

Fig. 22A is an enlarged view of detail a of fig. 22.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended as limitations on the scope of the invention, but are merely illustrative of the true spirit of the technical solution of the invention.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the sake of clarity, the structure and operation of the present invention will be described with the aid of directional terms, but the terms "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be understood as words of convenience and not as words of limitation.

Embodiments of the present invention are described below with reference to the drawings. Referring specifically to fig. 1, there is shown a collapsible container 100 according to the present invention, comprising a base 1, two pairs of side panels 2, 3 and a lid 4. Each pair of side panels 2, 3 is hinged at the bottom end to an edge of the base 1 and can be folded relative to the base 1, and the lid 4 is hinged by a hinge 5 to the top end of one of the pair of side panels 2. The side panels 2, 3 are provided at both longitudinal ends thereof with engaging portions 202 and 302, respectively, and when the side panels are erected with respect to the base 1, the side panels 2 and 3 are engaged with each other by the engaging portions 202 and 302 to form an inner volume of the foldable container 100 together with the base 1, and the lid 4 can cover the top opening of the foldable container 100. And when the respective side panels 2, 3 and the cover 4 are folded with respect to the base 1, the foldable container 100 can be conveniently stored and transported. It will be appreciated that the connection between the side panels 2 and 3 is not limited to the snap-fit arrangement described above, as long as they are able to enclose an interior space in end-to-end relationship with one another. The bottom ends of the side panels 2 and 3 are provided with side panel hinge portions for hinged connection to the outer edge of the base 1.

An exploded perspective view of one side panel 2, hinge 5 and lid 4 of the foldable box 100 is shown in fig. 2. As shown, the lid 4 is provided with a lid hinge 411 along a first edge 41 adjacent the side panel 2, while the top end 21 of the side panel 2 (also referred to as the long side panel or first side panel) is provided with a side panel hinge 211. The hinge 5 has a first edge 51 adjacent the lid 4 and a second edge 52 adjacent the side panel 2, the first and second edges 51, 52 of the hinge 5 being provided with first and second body hinges 511, 521 respectively. The lid hinge 411 and the first body hinge 511 are hingedly connected to each other, while the side panel hinge 211 and the second body hinge 521 are hingedly connected to each other.

Further, in order to better close the lid 4 on the top end opening, it is preferable that a groove opening upward and toward the inside of the case is provided on the inside of the top end of the other of the pair of opposed side plates 2 for receiving the second edge 42 of the lid 4 in the use state.

In the illustrated embodiment, the pair of side plates 2 is a long side plate having a longer length of two pairs of opposite side plates, and the other pair of side plates 3 (also referred to as a short side plate or a second side plate) is a short side plate having a shorter length, and the cover 4 is hinged to a top end 21 of one of the long side plates 2. It is understood that the lid 4 may also be hinged to the top end 3 of one of the short side panels by a hinge without departing from the scope of the invention. In another embodiment, the cover can also be covered on the top of the side plate by a mode such as clamping and the like.

In the particular embodiment shown in fig. 2, the lid hinge 411 includes a plurality of lid extensions 4111 spaced apart from one another, each lid extension 4111 extending horizontally from an edge 41 of the lid 4 along a plane in which the lid 4 lies, and each lid extension 4111 is provided with a hinge aperture 4112, the hinge aperture 4112 extending generally in the direction of the first edge 41. The side panel hinge portion 211 includes a plurality of side panel extensions 2111 spaced apart from each other, each side panel extension 2111 extending upwardly from the top end 21 of the side panel 2 along the plane of the side panel 2, and each side panel extension 2111 is provided with a hinge hole 2112, the hinge hole 2112 extending generally in the direction of the top end 21 of the side panel 2. The first and second body hinge portions 511 and 512 include a plurality of first and second body extensions 5111 and 5121, respectively, spaced apart from one another, each first body extension 5111 being provided with a hinge aperture 5112 and each second body extension 5121 being provided with a hinge aperture 5122. The hinge holes 5112 and 5122 extend substantially in the direction of the edges 51 and 52 of the hinge body 5, respectively. Preferably, the hinge holes 4112 are aligned with each other and the hinge holes 5112 are aligned with each other, so that when the lid extensions 4111 and the first body extensions 5111 are staggered with each other, the hinge holes 4112 and the hinge holes 5112 are aligned with each other, so that the hinge between the hinge member 5 and the lid 4 can be accomplished by passing the first hinge shaft 53 through the hinge holes 4112 and the hinge holes 5112. Preferably, the hinge holes 2112 are aligned with each other, and the hinge holes 5122 are aligned with each other, so that when the side plate extensions 2111 and the second body extensions 5121 are placed to be staggered with each other, the hinge holes 2112 and the hinge holes 5122 are aligned with each other, so that the hinge 5 and the side plate 2 can be hinged by passing the second hinge shaft 54 through the hinge holes 2112 and the hinge holes 5122. More preferably, the first edge 51 and the second edge 52 of the hinge 5 are parallel to each other. Thus, after the cover 4 is hinged to the side panel 2 via the hinge 5, the first hinge shaft 53 and the second hinge shaft 54 are parallel to each other.

Preferably, the first body hinge 511 of the hinge 5 is provided with a plurality of grooves 512 spaced apart from one another along the first edge 51, and at least a portion of the lid hinge 411 of the lid 4, and in particular each lid extension 4111 of the lid hinge 411, is located within the grooves 512. Preferably, when the lid 4 closes the opening of the foldable container 100, each lid protrusion 4111 is snugly located within each groove 512, thereby further ensuring closure of the opening.

Further, in an embodiment, not shown, it may be arranged that one of the lid extension 4111 and the first body extension 5111 is provided with a hinge shaft, and the other is provided with a hinge hole for fitting with the hinge shaft, so that the hinge of the lid 4 and the hinge 5 is achieved by fitting the hinge shaft into the hinge hole. Alternatively or additionally, it may be provided that one of the side plate extension 2111 and the second body extension 5121 is provided with a hinge shaft and the other is provided with a hinge hole for fitting with the hinge shaft, so that the hinge of the side plate 2 with the hinge 5 is achieved by fitting the hinge shaft into the hinge hole.

Of course, it is understood that the articulation between the lid 4 and the hinge 5 and between the side panels 2 and the hinge 5 are not limited to the above-described manner, and other conventional articulation manners within the field, such as articulation with each other by means of a flexible thinned portion, may be employed without departing from the scope of the present invention. In the utility model discloses in, when case lid 4 forms articulated connection with curb plate 2 through articulated elements 5, case lid 4 can rotate more than 270 around the top of curb plate 2 for curb plate 2, as shown in fig. 5. When the foldable box 100 is in the use state, the box cover 4 is perpendicular to the side panels 2 and closes the opening of the foldable box 100. When the foldable box 100 is in the storage state, the box lid 4 can be rotated with respect to the top ends of the side panels 2 to be placed on the outer surfaces of the side panels 2, so that the side panels 2 and the box lid 4 can be placed on the other three side panels after the other three side panels are placed on the base 1 in a folded state. As such, the collapsible bin 100 in the stowed condition is convenient for storage and transportation.

In the embodiment shown in the figures, the hinge 5 is a separate member from the side panel 2 and the lid 4, and the lid hinge 411 is provided only along the lid 4 at the first edge 41. It is understood that the hinge 5 may be integrally formed with one or both of the side panel 2 and the lid 4 without departing from the scope of this invention. For example, as mentioned above, the hinge 5 may be hingedly connected to the top end 21 of the side panel 2 and/or the first edge 41 of the lid 4 by a flexible thinned portion. Preferably, the hinge 5 has a thickness equal to the sum of the thicknesses of the side panel 2 and the cover 4 so as to be able to be attached to the outer surface of the side panel 2 without protruding upward when the cover 4 is folded over the outer surface of the side panel 2.

When the foldable box 100 is in use, the hinge 5 and the lid 4 are hinged to each other to form an assembly having a size matching the size of the opening of the foldable box 100, thereby enabling the opening of the foldable box 100 to be closed. When the foldable box 100 is in the storage state as shown in fig. 3, the side panel 2 is folded onto the base 1, and the box cover 4 is turned and folded to the outside of the side panel 2, at this time, the second edge 42 of the box cover 4 opposite to the first edge 41 does not extend beyond the bottom end of the side panel 2, so as to ensure that the second edge 42 of the box cover 4 does not extend beyond the outer edge of the base 1 in the folded state.

The cover 4 shown in fig. 2 has a plate-like main body, and the other three edges of the cover 4 except the first edge 41 are operatively overlapped on the top ends of the other side panel 2 and the two side panels 3, respectively, as shown in fig. 4.

In the foldable box 100 shown in fig. 1, the base 1 has a plate-like body 11 and a pair of opposite beads 12 extending upward from a pair of opposite edges of the plate-like body 11. The foldable box 100 with the side panels 2 in a folded state is shown in fig. 6A. Fig. 6C shows a perspective view of the side plate 2 detached from the base 1. In which fig. 6D shows a partial enlargement thereof. As shown in fig. 6D, the protective edge 12 has a cavity 121 with an upward opening and an inward opening, the upper portions of the two side end walls of the cavity 121 are provided with first base limiting protrusions 1211, and the middle portion of the cavity 121 is provided with a base limiting portion 1212 integrally extending upward from the bottom wall of the cavity 121 and a base guiding portion 1213 located in the base limiting portion and opening toward the inside. The base limiting portion 1212 has a T-shaped cross section, so that two elongated open grooves 1214 are formed on two sides and the sidewall of the cavity 121. The base guide 1213 is a cavity extending longitudinally. The base guide portion 1213 extends upward (longitudinally) by a predetermined distance from the base stopper portion. The bottom end of the side panel 2 is provided with a plurality of mutually spaced hinge extensions 22 extending downwardly. The hinge extensions 22 are received in the cavities 121 when the side panels 2 are erected relative to the base 1. The hinge extension 22 includes two side plate stoppers 221 extending downward from the side plate 2, and side surfaces of the two side plate stoppers 221 facing each other are provided with side plate hinge shafts 223, and the side plate hinge shafts 223 are rotatable and slidable up and down in the grooves 1214 to switch the side plate 2 between an upright state and a folded state with respect to the base 1. A side plate guide 222 is further provided between the two side plate stoppers 221. The side plate guide 222 includes a plate-like portion 222a connected between the two side plate stoppers 221, and a guide block 222b extending perpendicularly to the plate-like portion 222 a. The guide part can be connected with the base guide part in a vertically sliding manner. When the side panel 2 is in the erected state, the guide block 222b is engaged in the base guide portion 1213, thereby fixing the side panel 2 to the safe edge 12, as shown in the partial sectional view and the partial enlarged view of fig. 8A. The structure of the base guide 1213 and the structure of the side plate guide 222 are such that when the side plates are in the folded state, the joints of the side plates and the base are in a flat state without any dimples thereon. The first base restriction projection 1211 blocks the side panel restriction part 221 when the side panel 2 is in the folded state to prevent the side panel 2 from being separated upward from the base 1. The figures show 4 pockets 121 provided in the skirt 12 and 4 hinge extensions 22 provided at the bottom end of the side panel 2, but it will be appreciated that any suitable number of pockets 121 and hinge extensions 22 may be provided as required.

Preferably, the lid 4 is further provided with a locking mechanism for locking the lid 4 to the side panels, the locking mechanism being provided at a portion of the lid 4 remote from the first edge 41, so that the lid 4 can be more firmly closed to the side panels.

The utility model discloses a foldable box 100 still can have the heat preservation function through set up the heat preservation in base 1, curb plate 2 and 3 and case lid 4. As shown in fig. 9, 9A and 9B, each of the first side plate 2, the second side plate 3 and the box cover 4 is formed by welding an inner plate and an outer plate to each other, and an insulating layer is provided between the inner plate and the outer plate. As shown in fig. 10 and 10A, the plate-like body 11 and the beads 2 of the base 1 are also provided with an insulating layer 16. The heat-insulating layers can be heat-insulating plates which are manufactured in advance and then are placed in the base, the side plates and the box cover. The heat insulating material can be a composite material, and different functional layers can be arranged for the main energy transmission paths (radiation, conduction and convection) to be compounded into a whole plate-shaped part heat insulating material. Through the utility model discloses an interior planking and plate-shaped member insulation material combination for filling material does not receive the technology to inject, has more extensive selection flexibility. In addition, no pollutant is generated in the production link, and the materials can be recycled. In one embodiment, the box cover and the side plates can be compounded by adopting a vacuum plate and a thermal radiation reflecting film, so that thermal radiation, convection and conduction can be blocked, and the purposes of heat preservation and heat insulation are achieved. Further, the inner panel and the outer panel may be connected to each other by welding, or may be connected to each other by other means such as screwing.

The internal structure at the top end 21 of the side panel 2 and the internal structure at the first edge 41 of the lid 4 are shown in the detail enlarged view of fig. 9A. The side plate 2 is formed by welding a side plate outer plate 23 and a side plate inner plate 24, and the box cover 4 is formed by welding a box cover outer plate 43 and a box cover inner plate 44. The inner side of the outer periphery of the inner panel 24 of the side panel 2 is provided with a bead 25, and the bead 25 extends substantially in the direction of the outer periphery of the inner panel 24 and extends from the outer surface of the side panel inner panel 24 toward the inner surface of the side panel outer panel 23, and is used for being welded at the end to the inner surface of the side panel outer panel 23. It should be understood that the weld bead 25 may also be disposed inside the outer periphery of the side panel outer panel 23 and extend from the inner surface of the side panel outer panel 23 toward the outer surface of the side panel inner panel 24 and serve to be welded at the ends to the outer surface of the side panel inner panel 24. It is also understood that the weld bead 25 may be provided both inside the outer periphery of the side panel outer panel 23 and inside the outer periphery of the side panel inner panel 24, with the ends of the weld bead 25 being welded to each other. As can be seen in the figures, the side plate 2 is provided with two mutually parallel and mutually spaced apart welding ribs 25. In the case where the side panels 2 and the cover 4 of the foldable box 100 are made of a plastic material, welding between the welding rib 25 and the outer surface of the inner panel 24, the inner surface of the outer panel 23, or another welding rib 25 is performed by ultrasonic welding to better achieve sealability of the welding line. An insulating layer 26 is provided in an inner space surrounded by the inner plate 23, the outer plate 24, and the weld bead 25. The provision of the two spaced-apart weld beads 25 can further ensure the sealing property of the space surrounded by the outer plate, the inner plate, and the weld beads with respect to the outside. Further, for convenience of manufacture, it is preferable that the side plate engaging portion and the side plate hinge portion are integrally formed on the outer plate 23.

A cavity for containing the heat-insulating layer is formed among the surface of the inner plate, the surface of the outer plate and the welding ribs, and the surfaces of the inner plate and the outer plate, which face the cavity and define the cavity, are flat surfaces or the surfaces of the inner plate and the outer plate, which face the cavity and define the cavity, are provided with at least one reinforcing rib. When the reinforcing bars are provided, the reinforcing bars are spaced apart from each other and from the weld bars. Preferably, the reinforcing ribs are parallel to the weld ribs. In one embodiment, the surfaces of the inner and outer plates of the second side plate facing the cavity and defining the cavity are flat surfaces. In another embodiment, the surfaces of the inner and outer panels of the lid and the first side panel facing the cavity and defining the cavity are provided with at least one reinforcing rib.

The side panel 3 may be formed by welding the outer panel 30 and the inner panel 31 with an insulating layer 36 therebetween. The specific structure is the same as the side plate 2, and is not described in detail herein.

In the case of two weld beads 25, the top of the side panel 2 is provided with a closed cavity formed by the two weld beads 25 together with the inner panel 24 and the outer panel 23.

As also shown in fig. 9A, the outer panel 43 of the lid 4 is provided with a weld bead 45 in the outer periphery thereof, the weld bead 45 extending generally in the direction of the outer periphery of the outer panel 43 and extending from the inner surface of the lid outer panel 43 toward the outer surface of the lid inner panel 44 and serving to be welded at the distal end to the outer surface of the lid inner panel 44. It should be understood that the weld bead 45 may also be disposed inside the outer periphery of the lid inner panel 44 and extend from the outer surface of the lid inner panel 44 toward the inner surface of the lid outer panel 43 and serve to be welded at the ends to the inner surface of the lid outer panel 43. It is also understood that the weld ribs 45 may be provided both inside the outer periphery of the case lid outer panel 23 and inside the outer periphery of the case lid inner panel 24, with the ends of the weld ribs 45 being welded to each other. As shown in the figures, the lid 4 is preferably provided with two parallel and spaced apart weld ribs 45. In the case where the lid 4 of the foldable box 100 is made of a plastic material, the welding between the weld bead 25 and the outer surface of the inner panel 44, the inner surface of the outer panel 43, or the other weld bead 45 is performed by ultrasonic welding to better achieve the sealability of the weld. An insulating layer 46 is provided in an inner space surrounded by the outer plate 43, the inner plate 44, and the weld beads 45. The provision of the two spaced-apart weld beads 45 can further ensure the sealing property of the space surrounded by the outer plate, the inner plate, and the weld beads with respect to the outside.

Fig. 12 shows a bottom exploded perspective view of the lid 4. The cover 4 has four edges 41, 42, 47 and 48. Preferably, the first edge 41 is provided with a lid hinge 4111, and the outer panel 43 at the second edge 42 extends beyond the inner panel 44 and overlaps the inside of the side panel 2 when the lid is closed. Specifically, as shown in fig. 4B, the edge of the outer plate 43 may be provided with a clamping edge 4a, and the inner top end of the side plate 2 is provided with a groove 2a with an opening facing upwards, and the clamping edge 4a may be clamped in the groove 2 a. In another embodiment, the outer panel at the second edge 42 is flush with the inner panel. While at the other two edges 47 and 48 the outer plate 43 extends beyond the inner plate 44. Preferably, the portion of the outer panel 43 extending beyond the inner panel 44 overlaps the side panel 3 when the foldable box 100 is in use.

Fig. 9B shows a cross-section at the protective edge 12 of the base 1. Fig. 10 and 10A show an exploded view and an enlarged detail view of the base 1. As can be seen from the figure, the base 1 is formed by welding a base main body 14 and a base bottom plate 15 to each other. The base body 14 is provided with a plate-like body cavity 142 opened downward and two pairs of opposite edge-protecting cavities 143, the plate-like body cavity 142 and the edge-protecting cavities 143 being spaced apart from each other by base weld ribs 141. The base body 14 includes a base plate 145, the base plate 145 is rectangular, the bead 12 is formed by a bead inner plate 124 and a bead outer plate 123, and the bead inner plate 124 and the bead outer plate 123 form the inner surface and the outer surface of the bead 12, respectively. The bead inner plate 124 extends upward from the edge of the bead base plate 145, and the pedestal welding bead 141 extends downward from the edge of the bead base plate 145 and is used for welding to the upper surface of the pedestal base plate 15. The lower end of the bead outer plate 123 is also welded to the upper surface of the base bottom plate 15, preferably to the upper surface edge of the base bottom plate 15. The bead inner plates 124 and the bead outer plates 123 and the base weld ribs 141 together form a bead cavity 143, and the base plates 145 and the base weld ribs 141 together form a plate-like body cavity 142. The edge protection cavity 143 and the plate-like body cavity 142 are provided with insulating layers, respectively. Furthermore, as mentioned above, the protective edge 12 is further provided with a plurality of cavities 121, and the portions of the protective edge 12 between the cavities 121 are also provided with insulation. The insulation is typically made of lightweight foam.

Adopt the above-mentioned structure foldable box 100 to have good thermal insulation performance, can be used for storing and give birth to bright product.

According to the utility model discloses, in order to form better sealed and keep warm, still can set up seal structure to collapsible case 100. As shown in fig. 14 to 22A in particular, in the foldable box 100, sealing members are provided at the joints between the box cover 4 and the side panels 2 and 3, the joints between the base 1 and the side panels 2 and 3, and the joints between the side panels 2 and 3, thereby achieving sealing of the inside of the foldable box 100 with respect to the outside.

As shown in fig. 19, a seal 401 between the case cover 4 and the side plates 2 and 3 is provided on the bottom-side outer periphery of the case cover 4 and fixedly attached to the case cover 4. Specifically, the seal 401 is in the shape of a rectangular ring having two opposing pairs of sides. The seal 401 is attached to the outer edge of the inner plate 44 of the lid 4. The seal 401 may be attached to the outer edge of the inner plate 44 in any suitable manner, for example by providing a number of protrusions on the outer edge of the inner plate 44 and a number of shape-matching snap-in grooves on the seal 401 to snap-fit the seal 401 to the inner plate 44, or by providing a number of protrusions on the seal 401 and a correspondingly shaped recess on the edge of the inner plate 44 for receiving the protrusions. It is also contemplated that a bead may be provided on the seal 401 and a corresponding groove may be provided on the outer edge of the inner plate 44 to receive and retain the bead.

In a preferred embodiment, seal 401 of lid 4 has a seal body 4011 and at least one row of posts 4012 projecting from seal body 4011, posts 4012 terminating at a distal end. The cover 4 is provided with corresponding mounting holes, and the fasteners are clamped into the mounting holes to mount the sealing element on the cover.

In the preferred embodiment shown in fig. 20, in the use condition of the foldable box 100, when the lid 4 is closed at the top opening, a pair of sides of the seal 401 at the edges 47 and 48 extends beyond the outer edges of the inner panels of the side panels 3, while the side at the edge 42 operatively abuts against the side panel 2. Preferably, the top end of one of the side panels 2 not hinged to the lid 4 is provided, on the inside, with a recess 2a opening upwards and towards the inside of the box, against which recess 2a catch 4a of the seal 401 at the edge 42 operatively abuts, see fig. 20B.

Fig. 20A shows an enlarged partial cross-sectional view of the lid 4 hinged to one of the side panels 2 by the hinge 5. As shown in fig. 21, 22 and 22A, a hinge seal 501 is attached to the underside of the hinge 5, and a first side 5011 of the hinge seal 501 operatively abuts the side plate 2, wherein the first side 5011 is the side of the hinge seal 501 away from the lid 4. Preferably, a second side 5011 of hinge seal 501 adjacent to cover 4 at least partially overlaps seal 401 on cover 4.

The side plate 2 and the side plate 3 are also provided with seals 201 and 301, respectively, the seal 201 of the side plate 2 being shown in fig. 15 and 15A and the seal 301 of the side plate 2 being shown in fig. 16 and 16A. The side plate 2 and its seal 201 and the side plate 3 and its seal 301 are further shown in fig. 17 and 18, respectively.

As previously described, hinge extensions 22 are provided at the bottom ends of the side panels 2 for forming a hinged connection with the cavity 121 of the base 1. Preferably, hinge extensions 32 are also provided at the bottom ends of the side panels 3, and in order to hingedly connect the side panels 3 to the base 1, protective rims 16 are also provided at a respective pair of edges of the base 1, as shown in fig. 14. A cavity 161 is also provided in the bead 16. The cavity 161 and the hinge extension 32 may have the same structure as the cavity 121 and the hinge extension 22, respectively, and thus will not be described in detail.

In the embodiment shown in fig. 17 and 18, the seal 201 of the side plate 2 is located only at the bottom of the side plate 2, while the seal 301 of the side plate 3 has a substantially rectangular ring shape including portions located at the four edges of the side plate 3, respectively. Thus, the sealing between the side plates 2 and 3 is achieved by the left and right side edge portions of the sealing member 301 of the side plate 3. It should be understood that it is also possible to provide that the sealing member 201 of the side plate 2 has a substantially rectangular ring shape including portions respectively located at four edges of the side plate 2, while the sealing member 301 of the side plate 3 is located only at the bottom of the side plate 3, so that sealing between the side plate 2 and the side plate 3 is achieved by the left and right edges of the sealing member 201 of the side plate 2.

As shown in fig. 17, the sealing member 201 of the bottom of the side plate 2 includes a plurality of "n" -shaped portions at the center and half "n" -shaped portions at both sides, wherein the two legs of each n-shaped portion cover the inner side surfaces of the adjacent two side plate stopper portions 221 of the adjacent two hinge protrusions 22, respectively, and the half "n" -shaped portions at both sides cover the inner side surfaces of the outer end side plate stopper portions 221 of the hinge protrusions 22 at both right and left sides of the side plate 2. Wherein the above-mentioned "n" -shaped portion and the half "n" -shaped portion are separate sealing members separated from each other, and the number of the "n" -shaped portions is set according to the number of the hinge protrusions 22. Specifically, the sealing members 201 are located at and extend beyond the left and right sides and the lower side of the hinge extension. From this, can effectively seal the clearance in the space between hinge extension left and right sides and the base safe edge to and the clearance between the cavity bottom on hinge extension and the base safe edge, cover the clearance between the cavity bottom on hinge extension and the base safe edge promptly. In one embodiment, the sealing member mounted on the hinge extension is provided with vertical grooves 201a at the left and right edges and a horizontal groove 201b at the lower edge, as shown in fig. 8A.

The portion of the sealing member 301 located at the bottom of the side plate 3 has the same structure and will not be described in detail. The portions of the seal 301 extending beyond the left and right sides and the lower side of the hinge projection are configured as shown in fig. 18 as protruding strips 301a and 301b protruding relative to the main body of the seal. The seal 201 has a similar structure. The connection between the seals 201 and 301 and the side plates 2 and 3 may be in any suitable manner, as described above with respect to the installation of the seal 401. In an embodiment not shown, a seal between the bottom of the side plate and the cavity of the base may be provided in the cavity of the base, or a seal may be provided in both the bottom of the side plate and the cavity of the base. A seal between the bottom of the side panel and the cavity of the base is arranged to cover a gap between the hinge extension and the bottom of the cavity on the base bead.

As described above, in the preferred embodiment, the side plates 2 and 3 are provided at both longitudinal ends thereof with the engaging portions 202 and 302, respectively, and when the side plates are erected with respect to the base 1, the side plates 2 and 3 are connected by engaging the engaging portions 202 and 302 with each other. The seal 301 is connected to the snap-in portion 302 of the side panel 3 and the seal 301 extends laterally beyond the snap-in portion 302 so as to be able to abut against the side panel 2 to seal the seam therebetween when the side panel 2 and the side panel 3 are connected to one another in the use condition of the foldable box 100. The connection between the sealing member 301 and the engaging portion 302 may be achieved in any suitable manner, for example by providing a plurality of mutually spaced protrusions on the elongate plate-like body of the sealing member 301 at the longitudinal edges thereof and corresponding recesses in the side plate engaging portion 302 for operatively securing the protrusions. In the case where the sealing member 201 includes portions at four edges, respectively, and the sealing member 301 is located only at the bottom of the side panel 3, then the sealing member 201 is connected to the engaging portion 202 of the side panel 2 and extends laterally beyond the engaging portion 202 so as to be able to abut against the side panel 3 to seal the seam therebetween when the side panel 2 and the side panel 3 are connected to each other in the use state of the foldable box 100. A plurality of mutually spaced projections are provided on the elongate plate-like body of the seal 201 at the longitudinal edges thereof, and corresponding recesses are provided in the side plate engaging portions 202 for operatively securing the projections.

The hinge 5 and its seal 501 are shown in fig. 20. Fig. 22 shows a perspective view of the hinge 5 and its seal 501 assembled together. An enlarged view of detail a of figure 22 is shown in figure 22A. The seal 501 fits snugly under the hinge 5. When lid 4 closes the opening of foldable box 100, seal 501 at least partially overlaps seal 401 of lid 4, thereby ensuring a seal at the seam between lid 4 and hinge 5. The connection between seal 501 and hinge 5 may be any suitable connection, as described above with respect to the installation of seal 401.

While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

Claims (20)

1. A collapsible container having a container body and a lid, wherein the container body has a base and a pair of opposed first side panels and a pair of opposed second side panels foldably connected to the base, and the lid is operatively connected to a top end of the container body, wherein at least one of the first side panels, the second side panels, and the lid is formed by interconnecting inner and outer panels with an insulating layer disposed therebetween.

2. The foldable box of claim 1, wherein one edge of the lid is hinged to a top end of the box.

3. The foldable box of claim 1, wherein the base has a plate-like body and a protective edge extending upward from the periphery of the plate-like body, and wherein an insulating layer is disposed in each of the plate-like body and the protective edge.

4. The foldable box of claim 1, wherein the inner and outer panels are welded to each other.

5. The foldable box according to claim 4, characterized in that at least one welding bead is provided inside the outer periphery of one of the inner and outer panels.

6. A collapsible container according to claim 4, characterised in that the inner periphery of one of the inner and outer panels is provided with two spaced apart weld beads.

7. The foldable box according to claim 1, characterized in that a cavity for receiving an insulating layer is formed between the surface of the inner panel and the surface of the outer panel, the surfaces of the inner panel and the outer panel facing the cavity and delimiting the cavity being flat surfaces or the surfaces of the inner panel and the outer panel facing the cavity and delimiting the cavity being provided with at least one reinforcement rib.

8. A collapsible container according to claim 5, characterised in that a cavity for receiving an insulating layer is formed between the surfaces of the inner and outer sheets, and that the surfaces of the inner and outer sheets facing the cavity and delimiting the cavity are provided with at least one reinforcing bead, wherein the at least one reinforcing bead is spaced apart from each other and from the welding bead.

9. The foldable box of claim 8, wherein the reinforcing ribs are parallel to the welding ribs.

10. The foldable box according to claim 1, characterized in that a cavity for receiving an insulating layer is formed between the surfaces of the inner and outer panels, the surfaces of the inner and outer panels of the second side panel facing the cavity and delimiting the cavity are flat surfaces, or the surfaces of the inner and outer panels of the box lid and the first side panel facing the cavity and delimiting the cavity are provided with at least one reinforcement rib.

11. A collapsible container according to claim 5, characterised in that a cavity for receiving an insulating layer is formed between the surfaces of the inner and outer sheets, and that the surfaces of the inner and outer sheets facing the cavity and delimiting the cavity are provided with at least one reinforcing bead, wherein the at least one reinforcing bead is spaced apart from each other and from the welding bead.

12. The foldable box of claim 11, wherein the stiffener is parallel to the weld bead.

13. A collapsible container according to claim 3, wherein the base is provided with a plate-like body cavity and two pairs of opposed bead cavities, wherein the plate-like body cavity and the bead cavities are spaced apart from each other.

14. A collapsible container according to claim 3, characterised in that the protective edge is provided with a plurality of cavities spaced apart from each other and opening upwards towards the interior of the container body, and that the interior of the protective edge is provided with insulation between the cavities.

15. The foldable box of claim 1, wherein a first edge of the lid is hinged to a top end of one of the pair of first side panels by a hinge, the first edge of the lid is provided with a lid hinge and the top end of one of the pair of first side panels is provided with a side panel hinge, wherein first and second edges of the hinge are provided with first and second body hinges, respectively, the lid hinge and first body hinges are hinged to each other and the side panel hinges and second body hinges are hinged to each other, wherein an underside of the hinge is connected with a hinge seal, a first side edge of the hinge seal operably abutting the first side panel.

16. The foldable box of claim 15, wherein at least a portion of a second side edge of the hinge seal opposite the first side overlaps the seal on the box cover.

17. The foldable box of claim 1, wherein the second side panel has a panel-like body and a plurality of hinge extensions extending from a lower portion of the panel-like body in spaced relation to each other, a bottom end of each hinge extension being provided with a side panel hinge, and left and right side edges of the panel-like body and the side panel hinges each being provided with a seal.

18. The foldable box of claim 1, wherein the left and right side edges of the plate-like body of the second side plate are each provided with a side plate engaging portion to which a side plate seal is attached, the side plate seal extending beyond the side plate engaging portion.

19. The foldable box of any one of claims 1 to 18, wherein the insulating layer is made of a sheet material.

20. The foldable box according to any of claims 1 to 18, characterized in that the insulation is made up of layers of composite materials with different functions.

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