Turnover box

Abstract

The present application discloses a turnover box, which includes a bottom plate, side plates and a locking structure. The lower ends of the side plates are rotatably connected to the bottom plate, and at least one locking structure is provided between two adjacent side plates; the locking structure includes a sliding member, an elastic support member, a limiting member, a thrust member, a first locking member and a second locking member; the limiting member and the second locking member are respectively arranged on two adjacent side plates, the sliding member is slidably arranged on the limiting member, and the elastic support member and the first locking member are respectively arranged at both ends of the sliding member; the thrust member is arranged on the limiting member, and the thrust member forces the sliding member to slide towards the second locking member through the elastic support member until the first locking member and the second locking member are connected to each other and form a lock; when the sliding member is pushed in the direction away from the second locking member, the elastic support member can be compressed, so as to realize the separation between the first locking member and the second locking member. It has a simple structure, simple and convenient installation operation, good locking effect and convenient folding.

Description

Technical Field

[0001] This application relates to the field of logistics turnover equipment, and specifically to a turnover box. Background Art

[0002] Turnover boxes, also known as logistics boxes, are widely used in industries such as machinery, automobiles, household appliances, light industry, and electronics. They are acid and alkali resistant, oil resistant, non-toxic and odorless, can be used to hold food, etc., are easy to clean, convenient for parts turnover, neatly stacked, and easy to manage. Their reasonable design and excellent quality are suitable for transportation, distribution, storage, circulation processing and other links in factory logistics. Turnover boxes can cooperate with a variety of logistics containers and work position utensils, and are used in various occasions such as various warehouses and production sites. They are essential items for production and circulation enterprises to carry out modern logistics management.

[0003] Currently, in order to save occupied space, existing turnover boxes generally adopt a foldable design, so that the turnover box can be folded up when not in use, reducing the space it occupies and facilitating transportation and storage.

[0004] However, existing foldable turnover boxes mainly have the following defects: 1. Their locking structure is relatively complex, difficult to install, and inconvenient to use; 2. There is often no nameplate rack provided on them, or the provided nameplate rack is inconvenient to use. Summary of the Invention

[0005] An object of this application is to provide a turnover box with a simple structure, easy to install, convenient to fold, diverse functions, good wear resistance, simple and convenient to use and operate, and good locking effect.

[0006] To achieve the above object, the technical solution adopted in this application is: a turnover box, including a bottom plate, a plurality of side plates, and a plurality of locking structures. The lower ends of the side plates are rotatably arranged on the bottom plate, and at least one of the locking structures is arranged between two adjacent side plates; the locking structure includes a sliding member, an elastic support member, a limiting member, a thrust member, a first locking member, and a second locking member; the limiting member and the second locking member are respectively arranged on two adjacent side plates, the sliding member is slidably arranged on the limiting member, and the elastic support member and the first locking member are respectively arranged at both ends of the sliding member; the thrust member is arranged on the limiting member, and the thrust member forces the sliding member to slide towards the second locking member through the elastic support member until the first locking member and the second locking member are connected to each other and form a lock; when the sliding member is pushed in the direction away from the second locking member, the elastic support member can be compressed, thereby realizing the separation between the first locking member and the second locking member.

[0007] Preferably, the limiting member is a limiting groove, the front surface of the limiting groove is an open structure, a plurality of limiting blocks are provided on the front surface of the limiting groove, and a relief hole is provided on the side wall of the limiting groove; the sliding member is a slider, and the slider is slidably disposed in the limiting groove through the open structure, the limiting blocks are used to prevent the slider from disengaging from the limiting groove, and the first locking member is connected to or separated from the second locking member through the relief hole. Its advantages are: simple structure, easy to install, and after installation, the slider has good stability and is not easy to fall off.

[0008] Preferably, a limiting hole is provided at the inner bottom of the limiting groove, and a clamping block is provided on the back surface of the slider; and when the first locking member and the second locking member are locked to each other, the clamping block just snaps into the limiting hole. Its advantages are: through the limiting cooperation between the clamping block and the limiting hole, the locking effect between the first locking member and the second locking member can be improved.

[0009] Preferably, the elastic support member is an elastic rod, both ends of the elastic rod are connected to the slider, and an elastic area that can be stretched is formed between both ends of the elastic rod and the thrust member. Its advantages are: simple structure, easy to process and form, and low cost.

[0010] Preferably, the elastic rod is of a U-shaped structure or a C-shaped structure or an arc-shaped structure, and an arc-shaped buffer section arranged in the reverse direction is integrally bent in the middle of the elastic rod. Its advantages are: when the elastic area is compressed, the U-shaped structure or C-shaped structure or arc-shaped structure of the elastic rod is beneficial to make the deformation of the elastic rod more uniform and symmetrical, so as to improve the elastic force of the elastic area; the formed arc-shaped buffer section is beneficial to prevent the elastic rod from breaking when the elastic area is compressed.

[0011] Preferably, the first locking member is a locking bolt, and the locking bolt is integrally arranged on the slider; the second locking member is a jack, and the jack is integrally formed on the side plate; when two adjacent side plates are erected, the elastic rod forces the slider to slide towards the jack direction, and the locking bolt is inserted into the jack, so as to realize the locking between two adjacent side plates; and when the slider is slid in the direction away from the jack, the elastic rod can be compressed, so that the locking bolt disengages from the jack, thereby releasing the locking between two adjacent side plates. Its advantages are: simple structure, easy to process and form, low cost, and simple and convenient to operate.

[0012] Preferably, an anti-disengagement buckle is provided outside the jack, the anti-disengagement buckle is integrally formed on the side plate, and the anti-disengagement buckle can prevent the locking bolt from separating from the jack. Its advantages are: the locking effect between the locking bolt and the jack can be improved.

[0013] Preferably, at least one third locking member is provided between two adjacent side plates. The third locking member includes a buckle and a clamping seat, and the buckle and the clamping seat are integrally provided on two adjacent side plates respectively. When the side plate with the clamping seat is erected first and then the side plate with the buckle is erected, the buckle can be snapped into the clamping seat. And the buckle can be separated from the clamping seat only when the side plate with the buckle is laid flat first. Its advantages are: the locking effect between two adjacent side plates can be further enhanced.

[0014] Preferably, a sign holder is provided on the front surface of at least one side plate. The sign holder includes a limit slot and at least one elastic clip. The limit slot and the elastic clip are both provided on the side plate. A sign can be inserted into the limit slot to distinguish the goods in the turnover box. And a clamping area for clamping the sign is formed between the elastic clip and the side plate. Its advantages are: a sign can be inserted through the limit slot to distinguish the goods in the turnover box; the sign can be clamped and fixed through the clamping area, and the sign can be prevented from falling off.

[0015] Preferably, a plurality of annular reinforcing ribs and a plurality of L-shaped reinforcing ribs are integrally provided on the bottom surface of the bottom plate. The plurality of annular reinforcing ribs are radially arranged in the middle of the bottom plate, and the plurality of L-shaped reinforcing ribs are arranged at the corners of the bottom plate. Its advantages are: the wear resistance of the bottom plate can be improved, and the bottom plate can be prevented from being worn due to moving the turnover box on the ground, thereby prolonging the service life of the turnover box.

[0016] Compared with the prior art, the beneficial effects of this application are as follows:

[0017] (1) The locking structure provided on this turnover box is simpler, easier to process and form, convenient to install and use, and has a good locking effect;

[0018] (2) Since the elastic rod is in a U-shaped structure, a C-shaped structure or an arc-shaped structure, when the elastic area is compressed, it is beneficial to make the deformation of the elastic rod more uniform and symmetrical, improve the elastic recovery force of the elastic area, and improve the sliding accuracy and stability of the slider. And an arc-shaped buffer section with a reverse arrangement is integrally bent in the middle of the elastic rod, which can play a buffering role when the elastic area is compressed, and is beneficial to avoid the elastic rod from being broken;

[0019] (3) A sign can be inserted through the limit slot to distinguish the goods in the turnover box; the sign can be clamped and fixed through the clamping area, and the sign can be prevented from falling off;

[0020] (4) The bottom surface of the bottom plate is integrally provided with a plurality of annular reinforcing ribs and a plurality of L-shaped reinforcing ribs, which can improve the wear resistance of the bottom plate, avoid abrasion of the bottom plate caused by moving the turnover box on the ground, and thus extend the service life of the turnover box. Brief Description of the Drawings

[0021] Figure 1 is a perspective view of the turnover box;

[0022] Figure 2 is Figure 1 the partial enlarged view at I in

[0023] Figure 3 is Figure 1 the partial enlarged view at II in

[0024] Figure 4 is the front view of the turnover box;

[0025] Figure 5 is Figure 4 the sectional view along A-A in

[0026] Figure 6 is Figure 5 the partial enlarged view at III in

[0027] Figure 7 is a schematic diagram of a side plate of the turnover box in a folded state;

[0028] Figure 8 is Figure 7 the partial enlarged view at IV in

[0029] Figure 9 is the perspective view of the side plate;

[0030] Figure 10 is Figure 9 the partial enlarged view at V in

[0031] Figure 11 is the bottom view of the turnover box.

[0032] In the figure: 10, bottom plate; 11, annular reinforcing rib; 12, L-shaped reinforcing rib; 20, side plate; 300, locking structure; 310, sliding member; 311, slider; 312, clamping block; 313, groove; 314, paddle; 320, elastic support member; 321, elastic rod; 322, buffer section; 330, limiting member; 331, limiting groove; 332, relief hole; 333, limiting block; 334, limiting hole; 340, thrust member; 350, first locking member; 351, locking pin; 360, second locking member; 361, jack; 362, anti-release buckle; 40, third locking member; 41, buckle; 42, card seat; 50, license plate holder; 51, limiting slot; 52, elastic clip. Detailed implementation manners

[0033] Next, in combination with the detailed implementation manners, the present application will be further described. It should be noted that, on the premise of non-conflict, any combination can be formed among the following-described embodiments or technical features to form a new embodiment.

[0034] In the description of the present application, it should be noted that for orientation terms, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the indicated orientation and positional relationships are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present application.

[0035] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence.

[0036] The terms "comprising" and "having" in the description and claims of the present application, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0037] Refer to Figure 1-11, A turnover box, comprising a bottom plate 10, side plates 20, a locking structure 300, a third locking member 40 and a sign holder 50. The bottom plate 10 and the four side plates 20 enclose a box body with an open upper end. The four side plates 20 are all hinged to the bottom plate 10, and at least one locking structure 300 is provided between adjacent side plates 20. When the four side plates 20 are erected, the adjacent side plates 20 can be locked by the locking structure 300, so that the turnover box can be used normally. Moreover, when the locking between the adjacent side plates 20 by the locking structure 300 is released, the four side plates 20 can be laid flat on the bottom plate 10, so that the turnover box can be folded. In addition, a sign holder 50 is provided on the front surface of at least one side plate 20. The sign holder 50 includes a limit slot 51 and at least one elastic clip 52. The limit slot 51 is preferably an L-shaped structure, and the elastic clip 52 is preferably an arc-shaped structure. The limit slot 51 and the elastic clip 52 are integrally formed on the front surface of the side plate 20. A sign board can be inserted into the limit slot 51 to distinguish parameters such as the type, model, and weight of the goods in the turnover box. The clamping area formed between the elastic clip 52 and the side plate 20 can clamp the sign board to prevent the sign board from falling. In addition, as Figure 11 shown, two annular reinforcing ribs 11 and four L-shaped reinforcing ribs 12 are integrally provided on the bottom surface of the bottom plate 10. The two annular reinforcing ribs 11 are radially arranged in the middle of the bottom plate 10, and the four L-shaped reinforcing ribs 12 are respectively arranged at the four corners of the bottom plate 10, which can greatly improve the wear resistance of the bottom plate 10 and prevent the bottom plate 10 from being worn due to moving the turnover box on the ground, thereby prolonging the service life of the turnover box.

[0038] The locking structure 300 includes a sliding member 310, an elastic support member 320, a limiting member 330, a thrust member 340, a first locking member 350 and a second locking member 360. The limiting member 330 and the second locking member 360 are respectively arranged on adjacent side plates 20. The sliding member 310 is slidably arranged on the limiting member 330. The elastic support member 320 and the first locking member 350 are respectively arranged at both ends of the sliding member 310. The thrust member 340 is arranged on the limiting member 330. The thrust member 340 limits the elastic support member 320, thereby forcing the sliding member 310 to slide towards the second locking member 360 until the first locking member 350 and the second locking member 360 are connected to each other and form a lock. At this time, the adjacent side plates 20 are locked. When the sliding member 310 is pushed in the direction away from the second locking member 360, the elastic support member 320 is compressed, and the separation between the first locking member 350 and the second locking member 360 can be realized. At this time, the locking between the adjacent side plates 20 is released.

[0039] In order to simplify the structure and facilitate installation, the limiting member 330 is preferably a limiting groove 331, which is integrally formed on a side plate 20, and the front of the limiting groove 331 is an open structure, and a clearance hole 332 is provided on the side wall of the limiting groove 331; the sliding member 310 is preferably a slider 311, and the slider 311 can be placed in the limiting groove 331 through the open structure, and forms a sliding fit with the limiting groove 331. The first locking member 350 is preferably a locking pin 351, which is integrally formed at the left end of the slider 311 (the left end refers to Figure 6 The second locking member 360 is preferably a socket 361, which is integrally formed on the other side panel 20; during the sliding process of the slider 311, the locking pin 351 is connected or separated from the socket 361 through the clearance hole 332. When the two adjacent side panels 20 are erected, the locking pin 351 is inserted into the socket 361 through the clearance hole 332, thereby preventing the two adjacent side panels 20 from rotating; when the slider 311 is slid away from the socket 361, the elastic support member 320 is compressed to separate the locking pin 351 from the socket 361, thereby releasing the locking between the two adjacent side panels 20. In order to facilitate the sliding of the slider 311, a groove 313 can be provided on the front side of the slider 311. The groove 313 can be formed by the front side of the slider 311 being integrally recessed toward the back side, or the groove 313 can run through the entire slider 311. The slider 311 can be slid more conveniently through the groove 313. In addition, the groove 313 is preferably circular or elliptical, etc. Such shapes are more rounded and have no edges and corners, which can improve the feel and comfort of contact with the groove 313. Furthermore, a paddle 314 is formed by integrally extending outward on the side wall of the groove 313, so that the slider 311 can be slid more conveniently through the paddle 314. Preferably, the paddle 314 adopts an arc-shaped structure, so as to improve the feel and comfort of operating the paddle 314. In addition, a plurality of limit blocks 333 are integrally provided on the front side of the limiting groove 331. The slider 311 is limited by the limit blocks 333, thereby increasing the difficulty of the slider 311 being able to escape from the limiting groove 331. In addition, the limiting groove 331 and the slider 311 can adopt a convex-shaped structure, such as Figure 2 and Figure 10As shown, the first locking member 350 is located at the small-end of the slider 311. This structure facilitates the insertion of the first locking member 350 into the relief hole 332, with convenient installation and easy processing and shaping. Moreover, during the sliding process of the slider 311, its upper surface always contacts the upper sidewall of the limiting groove 331, and the lower surface always contacts the lower sidewall of the limiting groove 331. Therefore, the sliding accuracy of the slider 311 in the limiting groove 331 is high, and the slider 311 is not prone to swing up and down when sliding in the limiting groove 331, thus improving the stability of its sliding. Also, two limiting blocks 333 can be used and are respectively arranged at two right angles close to the small-end at the large-end of the limiting groove 331. When installing the slider 311, first insert the locking pin 351 into the relief hole 332, and then compress the elastic support member 320 so that the whole slider 311 can be embedded into the limiting groove 331. During this process, the influence of the two limiting blocks 333 on the installation of the slider 311 is very small, which is more conducive to the installation of the slider 311. Moreover, after installation, since the overall sliding amplitude of the slider 311 is small, the two limiting blocks 333 can still play a stable limiting role on the slider 311, thus preventing the slider 311 from disengaging from the limiting groove 331 during the sliding process. In addition, one end of the slider 311 close to the locking pin 351 has a relatively large thickness, which is conducive to strengthening the connection strength between the locking pin 351 and the slider 311, thereby enhancing the locking stability between the locking pin 351 and the jack 361.

[0040] To strengthen the locking of the slider 311, a limiting hole 334 is provided at the inner bottom of the limiting groove 331, and a clamping block 312 is provided on the back of the slider 311; as Figure 6 shown, both the clamping block 312 and the limiting hole 334 are preferably hemispherical. When the locking pin 351 is inserted into the jack 361, the clamping block 312 just snaps into the limiting hole 334. At this time, since the interval between the limiting block 333 and the bottom surface of the limiting groove 331 is adapted to the slider 311, the limiting fit between the clamping block 312 and the limiting hole 334 restricts the sliding of the slider 311, thereby increasing the difficulty of the slider 311 sliding in the limiting groove 331, playing a certain locking role on the slider 311, and further enhancing the locking effect between the locking pin 351 and the jack 361. Also, since the limiting groove 331, the slider 311, and the limiting block 333 are generally plastic parts with a certain deformation ability, when it is necessary to slide the slider 311, only a little force is needed to first separate the clamping block 312 from the limiting hole 334, and then the slider 311 can be slid. In addition, as Figure 8As shown, a release prevention member 362 is provided outside the jack 361. The release prevention member 362 is integrally formed on the side plate 20, and the release prevention member 362 can limit the separation of the locking pin 351 from the jack 361, thereby further enhancing the locking effect between the locking pin 351 and the jack 361. In addition, at least one third locking member 40 is provided between two adjacent side plates 20. The third locking member 40 includes a buckle 41 and a socket 42, and the buckle 41 and the socket 42 are respectively integrally provided on two adjacent side plates 20 (as Figure 2 shown); when the side plate 20 with the socket 42 is erected first and then the side plate 20 with the buckle 41 is erected, the buckle 41 can be snapped into the socket 42; and only when the side plate 20 with the buckle 41 is laid flat first, the buckle 41 can be separated from the socket 42, thereby further enhancing the locking effect between two adjacent side plates 20.

[0041] In order to simplify the structure and facilitate installation, the elastic support member 320 is preferably an elastic rod 321. Both ends of the elastic rod 321 are integrally formed at the right end of the slider 311 (the right end refers to the Figure 2 right end), and an expandable elastic region is formed between both ends of the elastic rod 321 and the thrust member 340. Under the limitation of the thrust member 340, in the initial state, the thrust generated by the elastic region on the slider 311 causes the slider 311 to slide in the direction of the jack 361, thereby driving the locking pin 351 to insert into the jack 361; when the slider 311 is slid in the direction away from the jack 361, the elastic region can be compressed to realize the separation between the locking pin 351 and the jack 361. In addition, in order to improve the stability of the expansion and contraction of the elastic region, the elastic rod 321 is preferably in a U-shaped structure, a C-shaped structure or an arc-shaped structure. When the slider 311 is slid in the direction away from the jack 361, the deformation of the elastic rod 321 is more uniform and symmetrical, which can improve the stability of the expansion and contraction of the elastic region, and further improve the support stability of the slider 311, ensuring the sliding stability and accuracy of the slider 311. Moreover, an arc-shaped buffer section 322 arranged in the reverse direction is integrally bent in the middle of the elastic rod 321 (as Figure 2 shown). Under the action of the arc-shaped buffer section 322, when the slider 311 is slid to compress the elastic rod 321, the arc-shaped buffer section 322 deforms in the inner direction of the elastic region, thereby playing a buffering role in the process of compressing the elastic rod 321, and further avoiding breaking of the elastic rod 321 during the process of compressing the elastic rod 321, and can also improve the elastic recovery force of the elastic region. It should be noted that an arc transition is provided between the arc-shaped buffer section 322 and the elastic rod 321, so as to avoid stress concentration and make the elastic rod 321 prone to breakage.

[0042] The thrust piece 340 is preferably a block structure, integrally formed in the limiting groove 331, and supports the middle part of the arc-shaped buffer section 322; when the slider 311 is slid in the direction away from the insertion hole 361, the thrust piece 340 can make the elastic rod 321 deform more evenly and symmetrically through the arc-shaped buffer section 322, thereby improving the elastic restoring force of the elastic zone. Of course, when there are two thrust pieces 340, and they support the two ends of the arc-shaped buffer section 322 respectively, the elastic rod 321 can also be deformed more evenly and symmetrically, thereby achieving the above purpose.

[0043] It should be noted that the locking structure 300 in this embodiment can be applied to the locking of various panels on various cabinets and boxes, and can also be applied to the locking of various door panels with opening and closing structures.

[0044] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A turnover box, comprising a bottom plate, a plurality of side plates and a plurality of locking structures, wherein the lower ends of the side plates are rotatably arranged on the bottom plate, and at least one of the locking structures is arranged between two adjacent side plates; characterized in that, The locking structure comprises a sliding member, an elastic support member, a limiting member, a thrust member, a first locking member and a second locking member; the limiting member and the second locking member are respectively arranged on two adjacent side plates, the sliding member is slidably arranged on the limiting member, the elastic support member and the first locking member are respectively arranged at two ends of the sliding member; the thrust member is arranged on the limiting member, and the thrust member forces the sliding member to slide in the direction of the second locking member through the elastic support member until the first locking member and the second locking member are connected to each other and locked; when the sliding member is pushed in the direction away from the second locking member, the elastic support member is compressed, thereby realizing the separation between the first locking member and the second locking member; The limiting member is a limiting groove, the front of the limiting groove is an open structure, a plurality of limiting blocks are arranged on the front of the limiting groove, and a clearance hole is arranged on the side wall of the limiting groove; the sliding member is a slider, the slider is slidably arranged in the limiting groove through the open structure, the limiting block is used to limit the slider from leaving the limiting groove, and the first locking member can be connected or separated from the second locking member through the clearance hole; The elastic support member is an elastic rod, both ends of which are connected to the sliding member, and a retractable elastic area is formed between the two ends of the elastic rod and the thrust member; The elastic rod is a U-shaped structure, a C-shaped structure or an arc-shaped structure, and the middle part of the elastic rod is integrally bent to form an arc-shaped buffer section arranged inversely; under the action of the arc-shaped buffer section, when the slider is slid to compress the elastic rod, the arc-shaped buffer section is deformed inwardly of the elastic zone, thereby playing a buffering role in the process of compressing the elastic rod, thereby avoiding the elastic rod from being broken in the process of compressing the elastic rod, and also improving the elastic restoring force of the elastic zone; There is an arc transition between the arc-shaped buffer section and the elastic rod, so as to avoid stress concentration and easy breakage of the elastic rod.

2. The turnover box according to claim 1, characterized in that, A limiting hole is provided at the inner bottom of the limiting groove, and a clamping block is provided on the back of the sliding block; and when the first locking member and the second locking member are locked with each other, the clamping block is just clamped into the limiting hole.

3. The turnover box according to claim 1, wherein, The first locking member is a locking pin, which is integrally arranged on the slider; the second locking member is a socket, which is integrally formed on the side panel; when the two adjacent side panels are erected, the elastic rod forces the slider to slide toward the socket and inserts the locking pin into the socket, thereby achieving locking between the two adjacent side panels; and when the slider is slid in a direction away from the socket, the elastic rod is compressed, so that the locking pin is disengaged from the socket, thereby releasing the locking between the two adjacent side panels.

4. The turnover box according to claim 3, characterized in that, An anti-dropout buckle is provided on the outer side of the insertion hole, and the anti-dropout buckle is arranged on the side plate. The anti-dropout buckle can limit the separation of the locking pin and the insertion hole.

5. The turnover box according to claim 3, characterized in that, At least one third locking member is provided between two adjacent side plates. The third locking member includes a buckle and a clamping seat. The buckle and the clamping seat are integrally provided on two adjacent side plates respectively. When the side plate with the clamping seat is erected first and then the side plate with the buckle is erected, the buckle can be snapped into the clamping seat. And the buckle can be separated from the clamping seat only when the side plate with the buckle is laid flat first.

6. The turnover box according to claim 1, characterized in that, A sign holder is provided on the front surface of at least one side plate. The sign holder includes a limit slot and at least one elastic clip. The limit slot and the elastic clip are both provided on the side plate. The limit slot is used for inserting a sign, and a clamping area for clamping the sign is formed between the elastic clip and the side plate.

7. The turnover box according to claim 1, characterized in that, A plurality of annular reinforcing ribs and a plurality of L-shaped reinforcing ribs are integrally provided on the bottom surface of the bottom plate. The plurality of annular reinforcing ribs are radially arranged in the middle of the bottom plate, and the plurality of L-shaped reinforcing ribs are arranged at the corners of the bottom plate.

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