Folding container structure

Abstract

The utility model relates to the field of foldable containers, and discloses a foldable container structure, a long side plate comprises a bearing main stand column, bearing auxiliary stand columns are arranged on the two sides of the bearing main stand column, a bottom plate comprises a folding limiting sleeve corresponding to the bearing main stand column, and the folding limiting sleeve is arranged on the bottom plate. Folding protective sleeves corresponding to the bearing auxiliary stand columns are arranged on the two sides of the folding limiting sleeves, and the long side plates are connected with the bottom plate in a clamped mode through insertion matching between the bearing main stand columns and the folding limiting sleeves and insertion matching between the bearing auxiliary stand columns and the folding protective sleeves; the bearing auxiliary stand column comprises a plug pin cushion block, the short side plate comprises a cylindrical hinge and a second limiting plug pin, and the short side plate is inserted into the plug pin cushion block through the second limiting plug pin to be in plug pin connection with the long side plate. The short side plates are connected with the bottom plate through cylindrical hinges in a hinged mode. The utility model can solve the problems of low space utilization rate and high transportation cost of the C box in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of foldable containers, specifically to a foldable container structure. Background Technology

[0002] Containers are standardized containers used for holding, loading, and transporting parts. Based on functional requirements, they are further subdivided into various types such as A-boxes, B-boxes, and C-boxes. Currently, containers for holding parts are widely used in warehouses, production lines, and internal logistics within factories. Among them, C-boxes, due to their structural stability and applicability, have become a common choice in production scenarios such as welding plants where the load-bearing and transfer requirements for parts are high.

[0003] However, traditional C-type containers typically adopt an integrated fixed structure, with the side walls and the bottom plate forming an inseparable whole through welding or rigid connection. While this structural design ensures the strength and stability of the C-type container during use, it also has the following problems: (1) Low space utilization: When not in use, empty containers cannot be compressed or folded when stacked, resulting in a large amount of storage and transportation space being occupied; (2) High transportation costs: Since the whole cannot be separated, the loading capacity per unit volume is low when transporting empty containers, making it difficult to improve logistics transportation efficiency, thereby increasing logistics costs. Utility Model Content

[0004] The present invention aims to provide a foldable container structure to solve the problems of low space utilization and high transportation costs in the existing C-box.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a folding container structure, wherein the front and rear sides of the base plate are movably engaged with the long side plate, the left and right sides of the base plate are hinged to the short side plate, and the long side plate and the short side plate are connected by pins; the long side plate includes a main support column, and secondary support columns are provided on both sides of the main support column; the base plate includes a folding limiting sleeve corresponding to the main support column, the folding limiting sleeve being a first groove structure; and secondary support columns corresponding to the secondary support columns are provided on both sides of the folding limiting sleeve. The folding sleeve has a second groove structure. The long side plate is engaged with the base plate through the insertion fit between the main support column and the folding limiting sleeve, and between the secondary support column and the folding sleeve. The secondary support column includes a pin pad located at the top. The short side plate includes a cylindrical hinge and a second limiting pin corresponding to the pin pad. The short side plate is connected to the long side plate by inserting the second limiting pin into the pin pad. The short side plate is hinged to the base plate through the cylindrical hinge.

[0006] The principle of this solution is as follows: When the box is unfolded, its long side panels are in an upright state. The long side panels are fixed to the bottom plate by folding limiting sleeves that support the main uprights and folding protective sleeves that support the secondary uprights. At the same time, the short side panels are in an upright state and are connected to the bottom plate hinges by cylindrical hinges. The short side panels are inserted into the pin pads of the adjacent long side panels by second limiting pins, thereby locking the pins between the short and long side panels and forming a complete C-box structure.

[0007] When folding is required, first remove the second limiting pin from the pin pad to disconnect the short side plate from the long side plate; then, fold the short side plate inward and place it flat on the left and right sides of the bottom of the base plate; then, lift the long side plate upward so that the main support column is disengaged from the folding limiting sleeve and the secondary support column is disengaged from the folding protective sleeve; then fold the long side plate inward and place it flat at the front and rear ends of the bottom of the base plate; finally, complete the folding of the entire C-box.

[0008] The advantages of this solution are: (1) This solution breaks the technical prejudice that "folding structure is difficult to guarantee structural strength". In the existing technology, it is generally believed that folding structure will affect the overall strength and stability of the box, reduce service life and safety.

[0009] (2) This solution uses the main / secondary support columns and limit sleeves of the long side plate for double fixation, combined with the pin locking of the short side plate, to ensure that the box has high load-bearing capacity and stability in the unfolded state, while allowing the C box to switch flexibly between the unfolded and folded states.

[0010] (3) This solution is easy to operate. With the help of pins and snap-fit, no complicated operation is required. One person can quickly complete the assembly or storage of the box without the need for additional tools.

[0011] (4) The cylindrical hinge allows the short side plate to rotate freely within a certain range, increasing the flexibility of the structure and making it easy to adjust the angle or fold.

[0012] (5) When folded, all side panels (i.e. long side panels and short side panels) can be laid flat on the bottom plate, reducing the volume after folding, making it easier to stack or transport, and reducing the storage area; at the same time, it increases the load capacity of a single transport and reduces transportation costs.

[0013] Preferably, as an improvement, the main support column includes a hollow main column, a limiting block at the bottom of the main column, a locking bolt and a through hole for the locking bolt to pass through below the limiting block; the top of the first groove structure has a first slot that matches the limiting block, the limiting block is inserted into the first slot for engagement, a slide rail is provided below the first slot, and the locking bolt passes through the slide rail and the through hole in sequence and is bolted to a nut; the secondary support column includes a hollow secondary column, the second groove structure is a rectangular groove that matches the secondary column, and the secondary column is inserted into the rectangular groove for engagement.

[0014] Beneficial effects: (1) The combination of "limiting block + first slot" limiting snap-fit ​​and "locking bolt + slide rail + through hole" bolt locking connection greatly enhances the connection strength and shear resistance between the main support column and the base plate, ensuring the stability of the C box structure under heavy load or vibration environment, and avoiding accidental unfolding caused by transportation vibration; at the same time, it makes the installation and disassembly of the main support column more convenient, and can be quickly assembled and reused; (2) The hollow main support column and secondary support column design reduces the weight while providing the necessary support strength, and provides the basic conditions for subsequent bolt locking and pin locking; (3) The matching snap-fit ​​method of the secondary support column and the rectangular slot simplifies the operation process, making the installation and disassembly of the secondary support column more convenient.

[0015] Preferably, as an improvement, the slide rail is elongated and the longitudinal length of the slide rail is 92mm.

[0016] Beneficial effects: The slide rail provides a reliable guide path and an adjustable connection range for the locking bolts, allowing the main column to be inserted and removed without complete disassembly.

[0017] Preferably, as an improvement, the limiting block is a triangular structure, the cross-section of which includes an integrally formed rectangle and a trapezoid, the trapezoid being located below the rectangle, forming a structure that gradually decreases in size from top to bottom.

[0018] Beneficial effects: The gradual narrowing from top to bottom makes it easier for the limiting block to be aligned and slide into place when inserted into the first slot; it also has good guiding properties, reducing the time and difficulty of manual adjustment and improving assembly efficiency.

[0019] Preferably, as an improvement, a pin pad is provided on one side of the top of the sub-column, and the pin pad has a pin hole for the second limiting pin to pass through; the second limiting pin includes a second pin rod and a second pin base for the second pin rod to pass through, the middle of the second pin base has a second limiting piece for restricting the movement of the second pin rod, and the middle of the second pin rod has a movable piece for controlling the movement of the second pin rod; the movable piece drives the second pin rod to insert into and lock the pin hole, thereby locking the pin; conversely, it unlocks the pin.

[0020] Beneficial effects: (1) The second pin base serves as the basic component for storing the pin rod, and the second pin rod provides guidance and support to ensure that it can move smoothly in a straight line; (2) The second limiting piece is used to limit the range of movement of the first pin rod, prevent the second pin rod from moving excessively or slipping, and enhance the stability of the overall structure; (3) The first movable piece is used to rotate and push the first pin rod to complete the pin operation.

[0021] Preferably, as an improvement, the rotation range of the second pin is 0-90 degrees; the second pin is a bent rod structure, the bent rod structure includes an integrally formed bent rod and a vertical rod, the bent rod is located on the outside of the second pin base and is used to insert into the pin hole for locking; the vertical rod is located inside the second pin base.

[0022] Beneficial effects: The rotation range is between 0 and 90 degrees, allowing for more intuitive control of the locking and unlocking state of the latch. When the second latch lever is at 0 degrees, the latch is fully locked; when rotated to 90 degrees, the latch is unlocked. The curved lever design provides a more stable locking effect, preventing accidental loosening due to vibration or external force; the simple design of the second latch lever facilitates insertion and removal, improving the operability of the equipment.

[0023] Preferably, as an improvement, the main support column further includes a limiting hole located on one side of the top of the main support column; the long side plate further includes a mesh panel, which includes a first mesh panel and a second mesh panel; adjacent main support columns are connected by the first mesh panel and the second mesh panel, wherein the first mesh panel is located above the second mesh panel, and the first mesh panel and the second mesh panel are connected by a hinge assembly; the top of the first mesh panel is provided with a first limiting pin, and the first mesh panel is inserted into the limiting hole through the first limiting pin to form a pin connection with the main support column.

[0024] Beneficial effects: The first limiting pin is used to ensure a stable connection between the first mesh panel and the main support column, making it less prone to loosening or falling off; its "first limiting pin + hinge assembly" allows the first and second mesh panels to have a certain folding capability, enabling flexible adjustment of the height of the long side panels on both sides, while also improving the efficiency of users in picking up and taking down items.

[0025] Preferably, as an improvement, the top of the main column is provided with an overlapping sleeve; the top of the pin pad is provided with a sealing plate, and the sealing plate covers the top of the secondary column.

[0026] Beneficial effects: The overlapping sleeve and sealing plate act as a seal to prevent external dust, moisture, and other impurities from entering the main or secondary columns, thus protecting them from corrosion and other damage and ensuring their long-term durability.

[0027] Preferably, as an improvement, the first groove structure further includes a second slot for engaging the side of the base plate, the second slot being located below the slide rail, and an overlapping foot being provided below the first groove structure.

[0028] Beneficial effects: The second slot is used to clamp the base plate, which can ensure a stable connection between the folding limit sleeve and the chassis frame; the overlapping feet can increase the contact area between the base plate and the ground, thereby providing stability and safety of the overall structure.

[0029] Preferably, as an improvement, the base plate includes a bottom panel and a chassis frame, the bottom panel is located above the chassis frame, the chassis frame is welded together from several rectangular frames, and the bottom of the chassis frame is provided with a fork bracket.

[0030] Beneficial effects: The bottom panel provides a stable support plane for the parts to be placed on, and also provides a reference plane for the subsequent folding operation of the C-box; the chassis frame is welded from several rectangular frames to form a high-strength grid structure, which serves as the basic load-bearing frame and can effectively enhance the overall load-bearing capacity and deformation resistance of the bottom plate; the fork brackets provide support points to support the entire bottom plate, and enhance the load-bearing capacity of the bottom plate by effectively distributing and supporting the load from above, so that it can withstand heavier loads without deformation or damage.

[0031] The beneficial effects of this solution are: (1) The bending rod in the second pin and the second limiting plate cooperate to form a double limit, which further restricts the movement of the second pin, prevents accidental slippage or loosening, improves the stability of the short side plate, and thus provides the safety of the overall structure of the C box.

[0032] (2) Each component in this solution (such as the first limit pin, the first limit pin, the folding sleeve, and the folding limit sleeve) can be replaced independently. Local damage does not affect the overall function, thus reducing maintenance costs.

[0033] (3) This solution achieves efficient folding while ensuring the rigidity of the box through the mechanical structure of each component, taking into account space efficiency, ease of operation and long-term durability. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of a foldable container structure provided in an embodiment of the present utility model.

[0035] Figure 2 This is a schematic diagram of the structure of the long side plate in an embodiment of this utility model. Figure 1 .

[0036] Figure 3 This is a schematic diagram of the hinge assembly in an embodiment of the present invention.

[0037] Figure 4 This is a schematic diagram of the structure supporting the main column in an embodiment of this utility model. Figure 1 .

[0038] Figure 5 This is a schematic diagram of the structure supporting the main column in an embodiment of this utility model. Figure 2 .

[0039] Figure 6 This is a schematic diagram of the supporting secondary column in an embodiment of this utility model.

[0040] Figure 7 This is a schematic diagram of the structure of the second limiting pin in an embodiment of this utility model.

[0041] Figure 8 This is a schematic diagram of the structure of the long side plate in an embodiment of this utility model. Figure 2 .

[0042] Figure 9 This is a schematic diagram of the structure of the long side plate in an embodiment of this utility model. Figure 3 .

[0043] Figure 10 This is a schematic diagram of the structure of the short side plate in an embodiment of this utility model.

[0044] Figure 11 This is a schematic diagram of the cylindrical hinge in an embodiment of the present invention.

[0045] Figure 12 This is a schematic diagram of the structure of the first limiting pin in an embodiment of this utility model.

[0046] Figure 13 This is a schematic diagram of the structure of the base plate in an embodiment of this utility model.

[0047] Figure 14This is a schematic diagram of the structure of the folding sheath in an embodiment of the present invention.

[0048] Figure 15 This is a schematic diagram of the folding limiting sleeve in an embodiment of the present utility model.

[0049] Figure 16 This is a schematic diagram of the overlapping foot structure in an embodiment of this utility model.

[0050] Figure 17 This is a schematic diagram of the connection between the overlapping foot and the folding limiting sleeve in an embodiment of this utility model.

[0051] Figure 18 This is a front view of a foldable container structure (in unfolded state) according to an embodiment of this utility model.

[0052] Figure 19 for Figure 18 A magnified view of a portion of the image.

[0053] Figure 20 This is a left view of a folding container structure (in unfolded state) according to an embodiment of this utility model.

[0054] The following detailed description illustrates the specific implementation method:

[0055] The reference numerals in the accompanying drawings include: long side plate 1, main support column 101, main column 1011, overlapping sleeve 1012, limiting block 1013, limiting hole 1014, through hole 1015, secondary support column 102, secondary column 1021, pin pad 1022, sealing plate 1023, pin hole 1024, first mesh 103, second mesh 104, third mesh 105, short side plate 2, fourth mesh 201, second limiting pin 202, second pin base 2021, second pin rod 2022. 2023, 2024, 3, 3, 3, 301, 302, 303, 303, 5, 6, 6, 61, 62, 63, 7, 8, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 10, 11, 12, 13, 18, 19, 10, 11, 12, 13, 18, 19, 10, 19, 10, 11, 12, 19, 10 ... Detailed Implementation

[0056] Example 1:

[0057] In this embodiment, the container selected is the C-type container. The C-type container has excellent stability and storage capacity, making it suitable for storing and transporting goods in various complex environments. It is primarily used to carry automotive parts.

[0058] The implementation examples are basically as follows Figure 1 As shown: A folding container structure comprises two long side plates 1, two short side plates 2, and a base plate 3. The long side plates 1 are snapped onto the front and rear ends of the base plate 3, and the short side plates 2 are pinned to the left and right sides of the base plate 3. The base plate 3, long side plates 1, and short side plates 2 are all made of low-carbon steel. For example, the mesh in the long side plates 1 and short side plates 2 is made of iron wire, possessing a certain strength and hardness.

[0059] Specifically, such as Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the long side plate includes a main support column 101, a secondary support column 102, a mesh panel, and a support rod 11. Specifically, the mesh panel includes a first mesh panel 103, a second mesh panel 104, and a third mesh panel 105. In this embodiment, the long side plate 1 has a length of 1690 mm and a width of 700 mm.

[0060] Each set of adjacent main support columns 101 is connected by a first mesh panel 103 and a second mesh panel 104. The first mesh panel 103 is located above the second mesh panel 104, and the first mesh panel 103 and the second mesh panel 104 are movably connected by a hinge assembly 8. The hinge assembly 8 includes a hinge pad 801 and a hinge 802. The hinge 802 is located at the edge of the first mesh panel 103, and the hinge pad 801 is located between the first mesh panel 103 and the second mesh panel 104 (i.e., the upper surface of the hinge pad 801 is in direct contact with the first mesh panel 103, and the lower surface of the hinge pad 801 is in direct contact with the second mesh panel 104). This enhances the flexibility and stability between the first mesh panel 103 and the second mesh panel 104, allowing the second mesh panel 104 to have a certain folding capability and enabling flexible adjustment of the height of the long side panel 1, thereby improving the efficiency of users in picking up and removing items. In addition, a first limiting pin 9 is installed on the top of the first mesh panel 103 for pin connection with the main support column 101 to ensure the stability between the first mesh panel 103 and the main support column 101, preventing loosening or detachment. A label clip 10 is installed on the outer side of the second mesh panel 104 for workers to quickly and easily insert or replace label information (such as labeling "C box" number, load limit, production line information, etc.), greatly improving the identification of the contents of the box and making it easier to find specific items. The secondary support columns 102 are located on both sides of the main support column 101, and each secondary support column 102 is connected to the main support column 101 on its side via a third mesh panel 105.

[0061] In this embodiment, these components are all fixedly connected by welding, thereby ensuring that the entire long side plate 1 has good stability and strength. After the main support column 101, the secondary support column 102 and the mesh are welded, the support rod 11 is then welded along the transverse direction of the main support column 101, the secondary support column 102 and the inner side of the mesh, and the support rod 11 is located in the middle to enhance the stability of the entire long side plate 1.

[0062] The main support column 101 includes a main column 1011, an overlapping sleeve 1012, a limiting block 1013, a limiting hole 1014, and a through hole 1015. Specifically, the main column 1011 is a hollow rectangular column to provide necessary support strength while reducing its own weight and providing a foundation for subsequent pinning operations. The overlapping sleeve 1012 is installed on the top of the main column 1011. The overlapping sleeve 1012 has a sealing function to prevent external dust, moisture, and other impurities from entering the main column 1011, thereby protecting the main column 1011 from corrosion and other damage and ensuring its long-term durability. A limiting hole 1014 is arranged on one side of the top of the main column 1011 for the first limiting pin 9 to pass through, so as to lock the first mesh 103 and the main column 1011, ensuring a stable connection between the first mesh 103 and the main column 1011. In addition, the limiting hole 1014 provides a precise positioning point for the first limiting pin 9, which can ensure that the first limiting pin 9 is accurately installed in place. A limiting block 1013 is installed below the limiting hole 1014 for engaging with the base plate 3, thereby firmly installing the main column 1011 on the base plate 3. In this embodiment, the limiting block 1013 has a triangular structure, and its cross-section includes an integrally formed rectangle and a trapezoid, wherein the trapezoid is located below the rectangle, forming a structure that gradually decreases from top to bottom, which enhances the fit between the limiting block 1013 and the base plate 3, so that the limiting block 1013 can be quickly and easily inserted into the corresponding slot of the base plate 3. The lower part of the limiting block 1013 is provided with a locking bolt 12 and a through hole 1015 through which the locking bolt 12 passes, thereby fixing the long side plate 1 to the base plate 3.

[0063] The supporting sub-column 102 includes a sub-column 1021, a pin pad 1022, and a sealing plate 1023. Specifically, the sub-column 1021 is a hollow rectangular column to provide necessary support strength while reducing its own weight and providing a foundation for subsequent pinning operations. The pin pad 1022 is installed on one side of the sub-column 1021 near the top. The pin pad 1022 is equipped with a pin hole 1024 to facilitate subsequent use with the limiting pin, thereby enabling the supporting sub-column 102 to be securely connected to other components (such as the short side plate 2). A sealing plate 1023 is installed on the top of the pin pad 1022, and the sealing plate 1023 also covers the top of the sub-post 1021. The sealing plate 1023 has a sealing function to prevent external dust, moisture and other impurities from entering the sub-post 1021, thereby protecting the sub-post 1021 from corrosion and other damage and ensuring long-term durability; at the same time, it can ensure a stable connection between the sub-post 1021 and the pin pad 1022.

[0064] The first limiting pin 9 includes a first pin base 901, a first pin rod 902, a first movable piece 903, and a first limiting piece 904. Specifically, the first pin rod 902 passes through the first pin base 901 and is used to directly insert into the limiting hole 1014 or the pin hole 1024 to achieve a locking function. In this embodiment, the first pin rod 902 is a bent rod, with one end bent and the other end remaining vertical. The bent part is the head, used to insert into the limiting hole 1014 or the pin hole 1024 for locking, and the vertical part is the tail, used to provide an operating point, allowing the operator to manually control the tail to adjust the overall position of the pin rod, realizing the pushing or pulling action of the pin rod for locking or unlocking operations. The first pin base 901, as the basic component for storing the pin rod, has a hollow "concave" structure, allowing the pin rod to pass through the entire pin base laterally, providing guidance and support for the first pin rod 902 and ensuring its smooth linear movement. A first limiting piece 904 is installed in the middle of the first pin base 901 to limit the movement range of the first pin rod 902 and prevent the first pin rod 902 from moving excessively or slipping. The first limiting piece 904 has a "type 7" structure, including a vertically extending piece extending downwards and a horizontally extending piece extending laterally from the top of the vertical piece. The bottom of the vertical piece is welded to the pin base to ensure that the position of the first limiting piece 904 is fixed, guaranteeing the stability of the first limiting piece 904 during use. The horizontal piece is located at the top of the first pin rod 902 and is used to control the position of the first pin rod 902. A first movable piece 903 is installed in the middle of the first pin rod 902 to rotate and push the first pin rod 902 to complete the pinning operation. That is, by rotating the first movable piece 903, the position of the first pin rod 902 can be adjusted to achieve the locking or unlocking function. The first movable piece 903 is also "type 7," including a vertically extending piece extending downwards and a horizontally extending piece extending laterally from the top of the vertical piece. The horizontal plate is directly connected to the first pin 902, and the vertical plate is used to provide an operating point for the operator to operate. The operator can control the movement of the first pin 902 by rotating or pushing the vertical plate, ensuring the convenience and accuracy of operation.

[0065] In this embodiment, the first pin lever 902 has a rotation range of 0-90 degrees, which allows for more intuitive control of the locking and unlocking states of the pin. When the first pin lever 902 is at 0 degrees, the pin is fully locked; when rotated to 90 degrees, the pin is unlocked. The curved lever design provides a more stable locking effect, preventing accidental loosening due to vibration or external force. The simple structural design of the first limiting pin 9 facilitates insertion and removal, improving the operability of the device.

[0066] like Figure 10 , Figure 11 , Figure 12As shown, the short side plate 2 includes a fourth mesh 201 and a second limiting pin 202. The short side plate 2 has a length of 980 mm and a width of 602 mm.

[0067] Specifically, the fourth mesh panel 201 is the main body of the short side plate 2, and a second limiting pin 202 is installed on its top. The second limiting pin 202 is used to connect with the supporting sub-column 102 to ensure a stable connection between the short side plate 2 and the supporting sub-column 102. The bottom of the fourth mesh panel 201 is hinged to the base plate 3 through several cylindrical hinges 13, allowing the short side plate to rotate freely within a certain range, increasing the flexibility of the structure and facilitating folding.

[0068] In this embodiment, the second limiting pin 202 has the same structure as the first limiting pin 9, the only difference being the installation position. Specifically, the second limiting pin 202 includes a second pin base 2021, a second pin rod 2022, a second movable piece 2023, and a second limiting piece 2024. The second pin base 2021 is welded above the fourth mesh 201 to determine the position of the pin. The second pin rod 2022 passes through the entire second pin base 2021. The middle part of the second pin base 2021 is welded to the second limiting piece 2024 to limit the movement range of the second pin rod 2022. The middle part of the second pin rod 2022 is welded to the second movable piece 2023 to control the movement of the second pin rod 2022. The second movable piece 2023 drives the second pin rod 2022 to insert into and lock into the pin hole 1024, thereby locking the short side plate 2 and the long side plate 1 together and fixing the short side plate 2 to the left and right sides of the base plate 3. Conversely, it unlocks the pin between the short side plate 2 and the long side plate 1. In this embodiment, the rotation range of the second pin rod 2022 is 0-90 degrees, which is used to more intuitively control the locking and unlocking states of the pin. When the second pin rod 2022 is at 0 degrees, the pin is in a fully locked state; when rotated to 90 degrees, the pin is in an unlocked state.

[0069] like Figure 13 , Figure 14 , Figure 15 , Figure 16 , Figure 17As shown, the base plate 3 includes a base panel 301 and a chassis frame 302. The base panel 301 is located above the chassis frame 302, providing a stable support plane for the parts to be housed and also serving as a reference surface for subsequent folding operations of the C-box. The chassis frame 302 is constructed from several welded rectangular frames, forming a high-strength grid structure that serves as the basic load-bearing frame, effectively enhancing the overall load-bearing capacity and deformation resistance of the base plate 3. Several folding limit sleeves 6 and folding protective sleeves 5 are installed at the front and rear ends of the chassis frame 302 to secure the long test plate. A fork bracket 303 is installed below the chassis frame 302 to provide support points for the entire base plate 3. By effectively distributing and supporting the load from above, the load-bearing capacity of the base plate 3 is enhanced, enabling it to withstand heavier loads without deformation or damage.

[0070] The folding sleeve 5 is a second groove structure, which is a rectangular groove welded to the upper edges of both ends of the chassis frame 302. It is used to securely clamp the supporting sub-column 102, ensuring its firmness and stability during use. This installation method not only simplifies the assembly process but also provides a foundation for the subsequent folding of the long side plate 1. The folding limiting sleeve 6 is located between the folding sleeves 5. In this embodiment, the folding sleeve 5 has a height of 100mm, a length of 45mm, a width of 50mm, and a thickness of 3mm.

[0071] The folding limiting sleeve 6 is a first groove structure used to engage the main support column 101. The first groove structure has, from top to bottom, a first slot 61, a slide rail 62, and a second slot 63. Specifically, the first slot 61 is located at the top of the first groove structure and is used to engage the limiting block 1013. Its cross-section is trapezoidal, matching the cross-section of the limiting block 1013, ensuring that the main support column 101 can be stably installed in the folding limiting sleeve 6. The slide rail 62 is located below the first slot 61 and works in conjunction with the locking bolt 12 to fix the main support column 1011 in the folding limiting sleeve 6. The slide rail 62 is elongated, with a longitudinal length of 92mm, providing a reliable guide path and adjustable connection range for the locking bolt 12, allowing the main support column 1011 to be inserted and removed without complete removal. When the main support column 101 is engaged within the folding limiting sleeve 6, the locking bolt 12 passes through the slide rail 62 and the through hole 1015 in sequence, and is fixed in place with the nut, thereby further enhancing the connection between the main support column 101 and the folding limiting sleeve 6. The second slot 63 is located below the slide rail 62 and is a rectangular slot used to secure the chassis frame 302, ensuring a stable connection between the folding limiting sleeve 6 and the chassis frame 302. In this embodiment, the folding limiting sleeve 6 has a height of 305mm, a length of 54mm, a width of 60mm, and a thickness of 3.5mm.

[0072] In addition, the lower end of the folding limiting sleeve 6 is equipped with an overlapping foot 7, which can increase the contact area between the base plate 3 and the ground, thereby providing stability and safety of the overall structure.

[0073] like Figure 18 , Figure 19 , Figure 20 As shown, the front and rear sides of the base plate 3 are movably connected to the long side plate 1, the left and right sides of the base plate 3 are hinged to the short side plate 2, and the long side plate 1 and the short side plate 2 are connected by the second limiting pin 202, thereby forming a foldable container structure.

[0074] The specific implementation process of folding the C-box is as follows:

[0075] 1. Folded state (i.e., when not in use):

[0076] (1) Folding the short sidewall: First, rotate the second movable piece 2023 in the second limiting pin 202 90° along the inside of the short side plate 2, so that the head of the second pin rod 2022 is disengaged from the locked position. Then, push the second movable piece 2023 to push the second pin rod 2022 outward, so that the head of the second pin rod 2022 is away from the pin hole 1024. Repeat the above operation to remove the second limiting pin 202 at the other end of the short side plate 2. Finally, tilt the short side plate 2 inward and place it flat on the left and right sides of the bottom of the base plate 3.

[0077] (2) Folding of the long side plate 1: First, rotate the locking bolt 12 to loosen it. Then, lift the long side plate 1 upwards so that the main support column 101 is disengaged from the folding limit sleeve 6, and the secondary support column 102 is disengaged from the folding protective sleeve 5. Specifically, the locking bolt 12 moves upwards along the slide rail 62, and the limit block 1013 is removed upwards from the first slot 61 to release the clamp, thereby disengaging the bottom of the secondary support column 102 from the folding protective sleeve 5. While lifting the long side plate 1 upwards, the secondary support column 102 is directly disengaged from the folding protective sleeve 5. Then, tilt the long side plate 1 inwards and place it flat at the front and rear ends of the bottom of the base plate 3. Finally, repeat the above steps to complete the folding of all the long side plates 1.

[0078] Once folded, the overall size of the C-box is one-third of its unfolded size, which facilitates transportation and storage, thereby reducing costs.

[0079] 2. Unfolded state (i.e., in use):

[0080] (1) Installation of long side plate 1: Lift the long side plate 1 upwards to make it vertical; push the long side plate 1 downwards along the slide rail 62 so that the main support column 101 is inserted into the folding limiting sleeve 6 and the secondary support column 102 is inserted into the folding protective sleeve 5. At the same time, move the locking bolt 12 down to the preset hole at the bottom of the slide rail 62 and tighten it to fix the long side plate 1 stably on the base plate 3. Finally, repeat the above steps to complete the unfolding of all long side plates 1.

[0081] (2) Installation of short side plate 2: Lift the short side plate 2 upwards to make it vertical; then, push the second movable piece 2023 to move the second pin 2022 inwards and insert it into the pin hole 1024. After that, rotate the second movable piece 2023 90° along the outside of the short side plate 2 so that the head of the second pin 2022 is locked inside the pin hole 1024, thus completing the locking. Finally, repeat the above steps to complete the unfolding of all long side plates 1.

[0082] In summary, this solution breaks the technical prejudice that "folding structures cannot guarantee structural strength." Existing technologies generally believe that folding structures affect the overall strength and stability of the container, reducing its service life and safety. Specifically, this solution ensures that the C-box has high load-bearing capacity and stability in its unfolded state through the double fixing of the long side panel 1 ("bearing main / secondary uprights + limiting sleeves (i.e., folding protective sleeve 5, folding limiting sleeve 6)") and the locking of the short side panel 2 ("cylindrical hinge 13 + limiting pin"), while also allowing for flexible switching between unfolded and folded states. Furthermore, when folded, all side panels (i.e., long side panel 1 and short side panel 2) can be laid flat on the bottom panel 3, reducing the folded volume, facilitating stacking or transportation, and reducing storage space requirements; it also increases the load capacity for a single shipment, reducing transportation costs.

[0083] Tests have shown that this solution offers the following improvements compared to the traditional integrated fixed structure C-box: (1) Space efficiency: The C-box is folded down by 67% and fits the dimensions of standardized logistics pallets. (2) Quick conversion: Unfolding / folding takes only 3 minutes and requires no tools. (3) Structural reliability: The "62 slide rails + 12 locking bolts + limit pins" design prevents accidental unfolding due to transportation vibrations. (4) Cost optimization: The load capacity per shipment is increased by 3 times, and the warehouse floor space is reduced by 50%.

[0084] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A folding container structure, comprising two long side plates, two short side plates, and a bottom plate, characterized in that: The front and rear sides of the base plate are movably engaged with the long side plate, the left and right sides of the base plate are hinged to the short side plate, and the long side plate and the short side plate are connected by a pin. The long side plate includes a main support column, and there are secondary support columns on both sides of the main support column. The base plate includes a folding limiting sleeve corresponding to the main support column, and the folding limiting sleeve has a first groove structure. There are folding protective sleeves on both sides of the folding limiting sleeve corresponding to the secondary support columns, and the folding protective sleeves have a second groove structure. The long side plate is engaged with the base plate through the insertion fit between the main support column and the folding limiting sleeve, and between the secondary support column and the folding protective sleeve. The secondary support column includes a pin pad, which is located at the top. The short side plate includes a cylindrical hinge and a second limiting pin corresponding to the pin pad. The short side plate is connected to the long side plate by inserting the second limiting pin into the pin pad. The short side plate is hinged to the base plate through a cylindrical hinge.

2. The folding container structure according to claim 1, characterized in that: The main support column includes a hollow main column, with a limiting block at the bottom. Below the limiting block are a locking bolt and a through hole for the locking bolt to pass through. The top of the first groove structure has a first slot that matches the limiting block. The limiting block is inserted into the first slot for engagement. Below the first slot is a slide rail. The locking bolt passes through the slide rail and the through hole in sequence and is bolted to a nut. The secondary support column includes a hollow secondary column. The second groove structure is a rectangular groove that matches the secondary column. The secondary column is inserted into the rectangular groove for engagement.

3. The folding container structure according to claim 2, characterized in that: The slide rail is elongated and has a longitudinal length of 92mm.

4. The folding container structure according to claim 2, characterized in that: The limiting block has a triangular structure, and its cross-section includes an integrally formed rectangle and a trapezoid. The trapezoid is located below the rectangle, forming a structure that gradually decreases in size from top to bottom.

5. A folding container structure according to claim 2, characterized in that: A pin pad is provided on one side of the top of the secondary column. The pin pad has a pin hole for the second limiting pin to pass through. The second limiting pin includes a second pin rod and a second pin base for the second pin rod to pass through. The middle part of the second pin base has a second limiting piece for restricting the movement of the second pin rod, and the middle part of the second pin rod has a movable piece for controlling the movement of the second pin rod. The movable piece drives the second pin rod to insert into and lock into the pin hole, thereby locking the pin; conversely, it unlocks the pin.

6. A folding container structure according to claim 5, characterized in that: The second pin has a rotation range of 0-90 degrees; the second pin is a bent rod structure, which includes an integrally formed bent rod and a vertical rod. The bent rod is located on the outside of the second pin base and is used to insert into the pin hole for locking; the vertical rod is located inside the second pin base.

7. A folding container structure according to claim 2, characterized in that: The main support column also includes a limiting hole located on one side of the top of the main support column; the long side plate also includes a mesh panel, which includes a first mesh panel and a second mesh panel; adjacent main support columns are connected by the first mesh panel and the second mesh panel, wherein the first mesh panel is located above the second mesh panel, and the first mesh panel and the second mesh panel are connected by a hinge assembly; the top of the first mesh panel is provided with a first limiting pin, and the first mesh panel is inserted into the limiting hole through the first limiting pin to form a pin connection with the main support column.

8. A folding container structure according to claim 2, characterized in that: The top of the main column is provided with an overlapping sleeve; the top of the pin pad is provided with a sealing plate, and the sealing plate covers the top of the secondary column.

9. A folding container structure according to claim 2, characterized in that: The first groove structure also includes a second slot for engaging the side of the base plate. The second slot is located below the slide rail, and an overlapping foot is provided below the first groove structure.

10. A folding container structure according to claim 1, characterized in that: The base plate includes a bottom panel and a chassis frame. The bottom panel is located above the chassis frame. The chassis frame is welded together from several rectangular frames. The bottom of the chassis frame is provided with a fork bracket.

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