Door plate assembly for container and container

Abstract

The door plate assembly comprises a door plate, a door frame and at least one door plate reinforcing rib, the door plate is composed of a composite material plate, and the composite material plate is provided with an inner surface facing the interior of the container and an outer surface opposite to the inner surface; the door frame is connected to the outer surface of the composite material plate; the door plate reinforcing rib is connected to the outer surface of the composite material plate. According to the application, the thin corrugated steel plate of the door plate of the container is replaced by the composite material plate with smaller density, so that the container is light in weight, low in manufacturing cost and environment-friendly. Through the door plate reinforcing ribs, physical properties such as structural strength and rigidity of the door plate can be guaranteed, deformation of the door plate is effectively avoided, and maintenance cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of containers, and more particularly to a door panel assembly for a container and a container. Background Art

[0002] The door panels of ordinary containers usually adopt thin corrugated steel plates, which are less stressed themselves and mainly play the roles of shielding and sealing. There are two main problems in the production process of containers: one is the sandblasting, anti-corrosion painting, etc. of thin corrugated steel plates, which not only have a large workload, but also have sandblasting dust noise and painting pollution, and the working environment is poor; the other is that the thin corrugated steel plates are welded to each other and to the main components of the door panel, with a large amount of welding, and the welding fumes, harmful gases, noise, radiation, etc. during the welding process will also have an adverse impact on the environment and the physical health of personnel. Moreover, during use, the door panels are prone to deformation and the maintenance cost is high.

[0003] Therefore, a door panel assembly for a container and a container are needed to at least partially solve the above problems. Summary of the Utility Model

[0004] A series of simplified concepts are introduced in the summary part of the utility model, which will be further described in detail in the specific implementation part. The summary part of the present utility model does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0005] To at least partially solve the above problems, the present application provides a door panel assembly for a container, and the door panel assembly includes:

[0006] A door panel, which is composed of at least one composite material board, and the composite material board has an inner surface facing the inside of the container and an outer surface opposite to the inner surface;

[0007] A door frame, which is connected to the outer surface of the composite material board; and

[0008] At least one door panel reinforcing rib, which is connected to the outer surface of the composite material board.

[0009] Optionally, the door panel reinforcing rib is arranged along the width direction of the door panel assembly.

[0010] Optionally, both ends of the door panel reinforcing rib are connected to or abutted against the door frame.

[0011] Optionally, the door panel assembly includes a first fastener and a second fastener. The door frame is connected to the composite material board through the first fastener, and the door panel reinforcing rib is connected to the composite material board through the second fastener. The distance between two adjacent first fasteners is D1, and the distance between two adjacent second fasteners is D2, where D2 > D1.

[0012] Optionally, the first distance D1 is 50 mm to 120 mm; and / or the second distance D2 is 80 mm to 170 mm.

[0013] Optionally, the thickness of the board used to make the door panel reinforcing rib is 2.5 mm to 4 mm.

[0014] Optionally, the door panel reinforcing rib includes a connecting portion and a protruding portion. The connecting portion is attached to and connected to the composite material board, and the protruding portion is connected to the connecting portion and extends away from the composite material board.

[0015] Optionally, the door frame includes door cross beams respectively located at the top and bottom of the door panel, and the door cross beams are arranged along the width direction of the door panel assembly.

[0016] Optionally, the door cross beam includes a connecting portion and a protruding portion. The connecting portion is attached to and connected to the composite material board, and the protruding portion is connected to the connecting portion and extends away from the composite material board.

[0017] Optionally, the door panel assembly includes a fastener. A recessed structure is formed inside the protruding portion, and the connecting portion includes a first connecting portion disposed in the recessed structure. The fastener connects the composite material board and the first connecting portion so that the outer end of the fastener is hidden inside the recessed structure.

[0018] Optionally, the container includes a fastener. The composite material board is connected to the door frame and / or the door panel reinforcing rib through the fastener, and a seal is provided around the fastener.

[0019] Optionally, a seal is provided between the mating surfaces of the composite material board and the door frame; and / or a seal is provided between the mating surfaces of the composite material board and the door panel reinforcing rib.

[0020] Optionally, the mating surfaces of the composite material board with the door frame and the door panel reinforcing rib are in the same plane.

[0021] Optionally, the door panel assembly further includes a door lock mechanism, which includes a lock rod and a lock rod bracket. The lock rod is vertically arranged, and there are mounting positions for mounting and fixing the lock rod bracket on the door panel reinforcing rib and / or the door frame. The lock rod is mounted to the door frame and / or the door panel reinforcing rib through the lock rod bracket.

[0022] Optionally, a relief groove is provided at a position corresponding to the mounting position on the inner side of the door frame and / or the door panel reinforcing rib. The relief groove is used to avoid bolts, nuts or installation tools for mounting and fixing the lock rod bracket.

[0023] Optionally, the door lock mechanism further includes a handle and a handle seat. The handle is pivotally connected to the lock rod, the handle seat is fixed to the door panel reinforcing rib, and the handle is rotatably and detachably locked on the handle seat.

[0024] According to another aspect of the present application, there is provided a container, which includes at least one of the above-mentioned door panel assemblies for containers. The door panel assembly is disposed on the rear end, front end and / or side of the container in an openable and closable manner.

[0025] According to the present application, the thin corrugated steel plate of the door panel of the container is replaced with a composite material plate with a smaller density, so that the container is light in weight, low in manufacturing cost and environmentally friendly. Through the door panel reinforcing rib, the physical properties such as the structural strength and stiffness of the door panel can be guaranteed, effectively avoiding the deformation of the door panel and reducing the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following drawings of the present application are hereby incorporated as part of the present application for understanding the present application. The embodiments of the present application shown in the drawings and their descriptions are used to explain the principles of the present application.

[0027] Figure 1 A perspective view of a door panel assembly for a container according to an embodiment of the present application, showing the exterior of the door panel assembly.

[0028] Figure 2 For Figure 1 Another perspective view of the door panel assembly shown, showing the interior of the door panel assembly and removing one door panel.

[0029] Figure 3 For the Figure 2 Cross-sectional view taken along line A-A of

[0030] Figure 4 For the Figure 2 Cross-sectional view taken along line B-B of

[0031] Figure 5 For Figure 3 Enlarged view of part A in

[0032] Figure 6 is Figure 4 an enlarged view of part B in

[0033] Figure 7 is Figure 1 a structural diagram of another example of the door panel reinforcing rib shown in

[0034] Figure 8 is Figure 1 a structural diagram of yet another example of the door panel reinforcing rib shown in

[0035] Figure 9 is a side view of the container according to the present application at the rear end.

[0036] Description of reference numerals:

[0037] 1 Door panel assembly

[0038] 10 Door panel

[0039] 20 Door frame

[0040] 21 Door cross beam

[0041] 22 Door vertical beam

[0042] 30 Door lock mechanism

[0043] 31 Lock rod

[0044] 32 Lock rod bracket

[0045] 41 Handle

[0046] 42 Handle seat

[0047] 50 Door panel reinforcing rib

[0048] 50A Connecting part

[0049] 50A1 First connecting part

[0050] 50A2 Second connecting part

[0051] 50B Protruding part

[0052] 50B1 First protruding part

[0053] 50B2 Second protruding part

[0054] 54 Concave structure

[0055] 55 Avoidance groove

[0056] 60 Fastener

[0057] 61 First fastener

[0058] 62 Second fastener

[0059] 70 composite material board Specific implementation manner

[0060] In the following description, numerous specific details are given to provide a more thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application may be practiced without one or more of these details. In other instances, some well-known technical features are not described in order to avoid obscuring the present application.

[0061] For a complete understanding of the present application, a detailed description will be presented in the following. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concept of these exemplary embodiments to those of ordinary skill in the art. Obviously, the implementation of the embodiments of the present application is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present application are described in detail below. However, in addition to these detailed descriptions, the present application may also have other implementation manners.

[0062] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of the described features, wholes, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0063] The ordinal numbers such as "first" and "second" cited in the present application are only identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component".

[0064] It should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer" and similar expressions used herein are only for illustrative purposes and are not restrictive.

[0065] Such as Figures 1 to 4As shown in the figure, the present application provides a door panel assembly 1 for a container. The door panel assembly 1 includes a door panel 10 and a door frame 20. The door frame 20 is disposed on one side of the door panel 10 in the thickness direction and is connected to the door panel 10 for supporting the door panel 10. The door panel assembly 1 is disposed at the rear end of the container. At this time, the rear end can also be referred to as the door end, and at this time, the container is an end-opening container. Alternatively, the door panel assembly 1 is disposed on the side of the container, and at this time, the container is a side-opening container. Exemplarily, the container may be provided with two door panel assemblies 1, and the two door panel assemblies 1 form a pair of opening doors structure. Of course, if necessary and / or desired, the container may be provided with one door panel assembly 1, and the one door panel assembly 1 forms a single-opening door structure. The door frame 20 includes door cross beams 21 respectively located at the top and bottom of a single door panel 10, and door vertical beams 22 respectively located at both ends of a single door panel 10 in the width direction of the door panel assembly 1. The door cross beam 21 extends between the two door vertical beams 22, and both ends of the door cross beam 21 are connected to the door vertical beams 22 (see Figure 2 ). The door frame 20 is made of steel material to ensure the overall structural strength of the door panel assembly 1. The door vertical beam 22 is rotatably connected to the corner post of the container through a hinge.

[0066] The door panel assembly 1 of the present application can be applied to 20-foot containers, 40-foot containers, 40-foot high-cube containers, 45-foot high-cube containers, or railway wide-body containers, etc.

[0067] The door panel 10 is composed of a composite material board 70. Specifically, a single door panel 10 is composed of at least one composite material board 70. Optionally, a single door panel 10 is composed of one composite material board 70. The composite material board 70 has an inner surface facing the inside of the container and an outer surface opposite to the inner surface. The door frame 20 is connected to the outer surface of the composite material board 70 through fasteners 60 such as screws and / or structural adhesives (see Figure 4 and Figure 6 ). The door panel assembly 1 further includes at least one door panel reinforcing rib 50, and the door panel reinforcing rib 50 is connected to the outer surface of the composite material board 70 through fasteners 60 such as screws and / or structural adhesives (see Figure 3 and Figure 5 ).

[0068] With this embodiment, at least the following beneficial effects can be achieved:

[0069] Replacing the thin corrugated steel plate with the composite material board 70, the composite material board 70 has the characteristics of being free of welding and painting. Therefore, it can greatly reduce the workload of welding and spraying in the production process of the container, reduce the emissions of VOCs and solid waste, and the environmental protection benefits are obvious. Since the composite material has excellent wear resistance, corrosion resistance, and impact resistance, it can effectively reduce the maintenance cost during the life cycle of the container.

[0070] The door panel stiffener 50, the door frame 20 are separated from the inside of the container by the composite material plate 70 that forms the door panel 10. The door panel stiffener 50 and the door frame 20 are not exposed inside the container, and the inner surface of the door panel 10 formed by the composite material plate 70 is flat. The composite material plate 70 that forms the door panel 10 can be in direct contact with the goods inside the container to make full use of the wear-resistant performance of the composite material. The flat inner surface of the door panel 10 is conducive to the shipment of goods and improving the biosecurity level of the container.

[0071] The door panel assembly 1 further includes a door lock mechanism 30. The door lock mechanism 30 includes a lock rod 31, a lock rod bracket 32, a handle 41 and a handle seat 42. The lock rod 31 is vertically arranged, and an installation position for installing and fixing the lock rod bracket 32 is provided on the door panel stiffener 50 and / or the door frame 20. The lock rod 31 is installed on the door frame 20 and / or the door panel stiffener 50 through the lock rod brackets 32 at different positions. For example, the lock rod bracket 32 can be connected to the door frame 20 and / or the door panel stiffener 50 respectively by suitable means such as welding or connection by fasteners 60 such as screws. An optional example is that the end of the handle 41 is pivotally connected to the lock rod 31, and the handle seat 42 can be fixed to the door panel stiffener 50 by welding or by fasteners 60 such as screws, and the handle 41 is rotatably and detachably locked on the handle seat 42.

[0072] The door panel stiffener 50 is arranged along the width direction of the door panel assembly 1. Both ends of the door panel stiffener 50 are connected to or abutted against the door vertical beam 22 (see Figure 2 ). On the one hand, it can strengthen the strength of the composite material plate 70, and on the other hand, it is convenient to fix the lock rod 31 and the handle seat 42 on the door panel stiffener 50. In other words, the door panel stiffener 50 can improve the structural strength of the door panel while providing the fixing positions for the lock rod 31 and the handle seat 42. In addition, the door panel stiffener 50 is arranged along the width direction of the door panel assembly 1, and the lock rod 31 is vertically arranged and installed on the door panel stiffener 50, which improves the anti-deformation ability of the middle position of the door panel 10 in the horizontal and vertical directions.

[0073] As Figure 3 and Figure 5As shown, the door panel reinforcing rib 50 includes a connecting portion 50A and a protruding portion 50B. The connecting portion 50A is attached to and connected to the composite material plate 70, and the protruding portion 50B is connected to the connecting portion 50A and extends away from the composite material plate 70. The structure of the door cross member 21 is substantially the same as that of the door panel reinforcing rib 50. Specifically, the door cross member 21 also includes a connecting portion 50A and a protruding portion 50B. The connecting portion 50A of the door cross member 21 is attached to and connected to the composite material plate 70, and the protruding portion 50B of the door cross member 21 is connected to its connecting portion 50A and extends away from the composite material plate 70. The protruding portion 50B can improve the structural strength. The connection of the connecting portion 50A to the composite material plate 70 makes the door panel reinforcing rib 50 and the composite material plate 70 form an integral body, and makes the door frame 20 and the composite material plate 70 form an integral body. As Figure 4 and Figure 6 shown, the door vertical beam 22 can be made of a square tube, for example. The composite material plate 70 is located inside the door vertical beam 22 and is connected to the door vertical beam 22 through fasteners 60, so that the outer end of the fastener 60 is hidden inside the square tube.

[0074] The protruding portion 50B includes a first protruding portion 50B1 and a second protruding portion 50B2. The second protruding portion 50B2 is connected to the first protruding portion 50B1 and is spaced apart from the connecting portion 50A in the thickness direction of the door panel reinforcing rib 50. The first protruding portion 50B1 is inclined or perpendicular to the connecting portion 50A. The second protruding portion 50B2 is parallel to the connecting portion 50A. The two protruding portions with different extending directions make the geometric structural strength of the door panel reinforcing rib 50 better. It should be noted that the number of the first protruding portions 50B1 is not limited, for example, it is one or two. The first protruding portion 50B1 is connected to the end position or the middle position of the second protruding portion 50B2. The second protruding portion 50B2 is connected to the first protruding portion 50B1 at at least one end in the width direction of the door panel reinforcing rib 50. The cross-sectional shape of the door panel reinforcing rib 50 is C-shaped, rectangular, U-shaped, H-shaped or Z-shaped. Specifically, the C-shaped, rectangular, U-shaped, H-shaped or Z-shaped has a flat part, and this flat part is the connecting portion 50A, which is attached to and connected to the composite material plate 70.

[0075] A concave structure 54 is formed inside the protruding portion 50B. Further, the inside of the two spaced-apart first protruding portions 50B1 and the second protruding portion 50B2 connected to the two first protruding portions 50B1 constitutes the concave structure 54. The connecting portion 50A includes a first connecting portion 50A1 provided inside the concave structure 54 and / or a second connecting portion 50A2 provided outside the concave structure 54. An example is, as Figure 7As shown, the connecting portion 50A includes a first connecting portion 50A1 and does not include a second connecting portion 50A2; the first connecting portion 50A1 is connected to the protruding portion 50B at both ends in the width direction of the door panel stiffener 50. The fastener 60 connects the first connecting portion 50A1 to the composite material plate 70. The cross-sectional shape of the door panel stiffener 50 is, for example, rectangular. Another example is, as Figure 8 shown, the connecting portion 50A includes a first connecting portion 50A1 and two second connecting portions 50A2 connected to the first connecting portion 50A1. The two second connecting portions 50A2 are respectively connected to both ends of the protruding portion 50B in the width direction of the door panel stiffener 50. The first connecting portion 50A1 is connected to the composite material plate 70 through the fastener 60, and the two second connecting portions 50A2 are bonded to the composite material plate 70 through structural adhesive. Both parts of the connecting portion are connected to the composite material plate 70, so that the connection reliability between the door panel stiffener 50 and the composite material plate 70 is better. Another example is, as Figure 5 shown, the connecting portion 50A includes two first connecting portions 50A1 and does not include a second connecting portion 50A2, and the two first connecting portions 50A1 are respectively connected to both ends of the protruding portion 50B in the width direction of the door panel stiffener 50.

[0076] The door panel assembly 1 includes a plurality of fasteners 60. The fastener 60 connects the composite material plate 70 and the first connecting portion 50A1, so that the outer end of the fastener 60 is hidden in the recessed structure 54 and is blocked by the protruding portion 50B. Thus, it is possible to further prevent water outside the box from entering the box through the fastener 60 at the door panel stiffener 50, effectively reducing the risk of water entering the box and improving the waterproof performance of the box; and the fastener 60 at the door panel stiffener 50 cannot be observed from the outside of the container, which can improve the overall aesthetics of the product.

[0077] The fastener for fixing the lock rod bracket 32 includes a bolt and a nut. The bolt is passed through the lock rod bracket 32 and the door frame 20, or through the lock rod bracket 32 and the door panel stiffener 50 with the aid of an installation tool. Avoidance grooves 55 are provided at positions corresponding to the installation positions on the inner sides of the door frame 20 and / or the door panel stiffener 50 (see Figure 2 ), and the avoidance grooves 55 are used to avoid the bolt or nut or the installation tool for installing and fixing the lock rod bracket 32. With such a setting, it is convenient to use an installation tool such as a wrench to fix the lock rod bracket 32 from the inner side of the door panel stiffener 50, and the installation is convenient. As Figure 2 shown, the first connecting portion 50A1 of the door cross beam 21 may be provided with an avoidance groove 55. Optionally, the first connecting portion 50A1 of the door panel stiffener 50 may be provided with an avoidance groove 55.

[0078] The door panel assembly 1 includes a first fastener 61 and a second fastener 62. It should be noted that, as described above, the fasteners 60 on the door frame 20 and the door panel stiffener 50 are blocked by the protruding portion 50B,Figure 9 The outer transmission positions of the first fastener 61 and the second fastener 62 are schematically shown. The gantry 20 is connected to the composite material plate 70 through the first fastener 61, and the door panel reinforcing rib 50 is connected to the composite material plate 70 through the second fastener 62. Two adjacent first fasteners 61 have a first spacing D1, and two adjacent second fasteners 62 have a second spacing D2. Since the connection between the composite material plate 70 and the gantry 20 needs to be more firm and reliable, the first fasteners 61 are arranged more densely relative to the second fasteners 62, and at this time D2 > D1. If necessary and / or desired, it can also be set to D2 ≤ D1. Optionally, the first spacing D1 is 50 mm to 120 mm, for example, D1 is 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, 75 mm, 80 mm, 85 mm, 90 mm, 100 mm, 110 mm, 120 mm and other appropriate values. The second spacing D2 is 80 mm to 170 mm, for example, D2 is 80 mm, 100 mm, 110 mm, 120 mm, 130 mm, 140 mm, 150 mm, 160 mm, 170 mm and other appropriate values. Setting the spacing of the fasteners 60 within the above range can ensure the reliable connection between the composite material plate 70 and the gantry 20 and the door panel reinforcing rib 50, and resist the deformation of the composite material plate 70.

[0079] The mating surfaces of the composite material plate 70 with the gantry 20 and the door panel reinforcing rib 50 are in the same plane. A seal (not shown) is provided between the mating surfaces of the composite material plate 70 and the gantry 20 with each other. And a seal can also be provided between the mating surfaces of the composite material plate 70 and the door panel reinforcing rib 50 with each other. By providing the seal, it is possible to prevent water outside the box from entering the box through the gap between the composite material plate 70 and the gantry 20 and the gap between the composite material plate 70 and the door panel reinforcing rib 50, effectively reducing the risk of water entering the box to ensure the overall watertightness of the container. The seal can be composed of sealant, seals such as tapes.

[0080] In the solution where the composite material plate 70 is connected to the gantry 20 and / or the door panel reinforcing rib 50 through the fasteners 60, a seal is provided around the fasteners 60. With such a setting, it is possible to block water from entering the box through the holes for the fasteners 60 to pass through and the gaps between the composite material plate 70 and the gantry 20 and / or the door panel reinforcing rib 50, and more effectively improve the water leakage prevention performance of the container. The seal surrounds the fasteners 60 to ensure the overall watertightness of the container.

[0081] The thickness t1 of the plate for making the door panel reinforcing rib 50 is 2.5 mm to 4 mm; for example, suitable values of t1 are 2.5 mm, 2.6 mm, 2.8 mm, 3 mm, 3.2 mm, 3.4 mm, 3.6 mm, 3.8 mm, 4 mm, etc. The plate of the door panel reinforcing rib 50 is preferably high-strength steel with a yield strength of 345 MPa or more.

[0082] The thickness t2 of the composite material plate 70 (see Figure 5 ) can be 2.5 mm to 4 mm; for example, suitable values of t2 are 2.5 mm, 2.6 mm, 2.8 mm, 3 mm, 3.2 mm, 3.4 mm, 3.6 mm, 3.8 mm, 4 mm, etc. Thus, the composite material plate 70 itself has a certain anti-deformation ability and anti-impact ability. The material of the composite material plate 70 is a known composite material or the composite material provided in this application. The material of the composite material plate 70 is preferably a known composite material or the composite material provided in this application with a tensile strength of 248 MPa or more. The composite material plate 70 can preferably be made of at least one of continuous fiber-reinforced thermoplastic composites, thermosetting fiber-reinforced composites, and thermoplastic glass steel plates. Specifically, the composite material mainly includes glass fibers and resin, and the glass fibers and resin can form a known composite material or the composite material provided in this application. Optionally, in this application, the mass percentage content of the glass fibers can be 60% to 70%, for example, suitable contents such as 60%, 62%, 64%, 66%, 68%, 70%, etc.; the mass percentage content of the resin can be 30% to 35%, for example, suitable contents such as 30%, 31%, 32%, 33%, 34%, 35%, etc. A small amount of additives can also be added to the composite material to form a plate.

[0083] According to another aspect of this application, a container is provided. The container includes the above-mentioned door panel assembly 1 for a container, and the door panel assembly 1 is arranged at the rear end or side of the container.

[0084] For the container according to this application, the thin corrugated steel plate of the door panel 10 of the container is replaced with a composite material plate 70 with a smaller density, making the container lightweight, with low manufacturing cost and being green and environmentally friendly. Through the door panel reinforcing rib 50, the structural strength, stiffness and other physical properties of the door panel 10 can be guaranteed, effectively avoiding the deformation of the door panel 10 and reducing the maintenance cost.

[0085] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of this application. The terms used herein are only for the purpose of describing specific implementation purposes and are not intended to limit this application. The features described in one implementation manner herein can be applied to another implementation manner alone or in combination with other features, unless the feature is not applicable or otherwise stated in that other implementation manner.

[0086] This application has been described through the above embodiments. However, it should be understood that the above embodiments are only for illustrative and explanatory purposes. This application is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of this application, and these variations and modifications all fall within the scope claimed by this application.

Claims

1. A door panel assembly for a container, characterized in that, The door panel assembly includes: A door panel, which is composed of a composite material board. The composite material board has an inner surface facing the inside of the container and an outer surface opposite to the inner surface; A door frame, which is connected to the outer surface of the composite material board; and At least one door panel stiffener, which is connected to the outer surface of the composite material board.

2. The door panel assembly for a container according to claim 1, characterized in that, The door panel stiffener is arranged along the width direction of the door panel assembly.

3. The door panel assembly for a container according to claim 2, wherein, Both ends of the door panel stiffener are connected to or abutted against the door frame.

4. The door panel assembly for a container according to claim 1, characterized in that, The door panel assembly includes a first fastener and a second fastener. The door frame is connected to the composite material board through the first fastener, and the door panel stiffener is connected to the composite material board through the second fastener. Adjacent two of the first fasteners have a first spacing D1, and adjacent two of the second fasteners have a second spacing D2, where D2 > D1.

5. The door panel assembly for a container according to claim 4, characterized in that, The first spacing D1 is 50 mm to 120 mm; and / or the second spacing D2 is 80 mm to 170 mm.

6. The door panel assembly for a container according to claim 1, characterized in that, The thickness of the board used to make the door panel stiffener is 2.5 mm to 4 mm; and / or the thickness of the composite material board is 2.5 mm to 4 mm.

7. The door panel assembly for a container according to claim 1, characterized in that, The door panel stiffener includes a connecting portion and a protruding portion. The connecting portion is attached to and connected to the composite material board, and the protruding portion is connected to the connecting portion and extends in a direction away from the composite material board.

8. The door panel assembly for a container according to claim 1, wherein, The door frame includes door cross beams respectively located at the top and bottom of the door panel. The door cross beams are arranged along the width direction of the door panel assembly.

9. The door panel assembly for a container according to claim 8, wherein, The door cross beam includes a connecting portion and a protruding portion. The connecting portion is attached to and connected to the composite material board, and the protruding portion is connected to the connecting portion and extends in a direction away from the composite material board.

10. The door panel assembly for a container according to claim 7 or 9, characterized in that, The door panel assembly includes a fastener. A recessed structure is formed inside the protruding portion. The connecting portion includes a first connecting portion disposed in the recessed structure. The fastener connects the composite material board and the first connecting portion so that the outer end of the fastener is hidden inside the recessed structure.

11. The door panel assembly for a container according to any one of claims 1 to 9, characterized in that, The container includes a fastener. The composite material board is connected to the door frame and / or the door panel stiffener through the fastener, and a seal is provided around the fastener.

12. The door panel assembly for a container according to any one of claims 1 to 9, characterized in that, A seal is provided between the mating surfaces of the composite material board and the door frame with each other; and / or a seal is provided between the mating surfaces of the composite material board and the door panel stiffener with each other.

13. The door panel assembly for a container according to any one of claims 1 to 9, characterized in that, The mating surfaces of the composite material board with the door frame and the door panel stiffener are in the same plane respectively.

14. The door panel assembly for a container according to any one of claims 1 to 9, characterized in that, The door panel assembly further includes a door lock mechanism. The door lock mechanism includes a lock rod and a lock rod bracket. The lock rod is arranged vertically. The door panel stiffener and / or the door frame are provided with mounting positions for mounting and fixing the lock rod bracket, and the lock rod is mounted to the door frame and / or the door panel stiffener through the lock rod bracket.

15. The door panel assembly for a container according to claim 14, characterized in that, An avoidance groove is provided at a position corresponding to the mounting position on the inner side of the door frame and / or the door panel stiffener. The avoidance groove is used to avoid bolts or nuts or mounting tools for mounting and fixing the lock rod bracket.

16. The door panel assembly for a container according to claim 14, characterized in that, The door lock mechanism further includes a handle and a handle base, the handle is pivotally connected to the lock rod, the handle base is fixed to the door panel reinforcing rib, and the handle is rotatably and detachably locked to the handle base.

17. A container, characterized in that, The container includes at least one door panel assembly for a container according to any one of claims 1 to 16, and the door panel assembly is disposed at the rear end, front end, and / or side of the container in an openable and closable manner.

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