A plastic packaging box for convenient stacking

Abstract

This utility model discloses a stackable plastic packaging box, relating to the field of plastic packaging box technology. It includes a box body and limiting blocks. The top of the box body is provided with a lid. Both sides of the bottom of the box body are rotatably connected to rotating plates via hinges. Positioning holes are provided inside the rotating plates. Multiple sets of positioning blocks are fixedly connected to the top of the box body. The bottom of the box body is provided with a folding and fixing mechanism for fixing the rotating plates at one angle. When this stackable plastic packaging box is empty, the two sets of rotating plates at the bottom can be folded and fixed, and then inserted into another set of boxes for stacking, thereby reducing the stacked volume. When the box contains goods, the rotating plates can be unfolded, and then positioned and stacked on top of another set of boxes through the positioning holes. When a single set of boxes is closed at the top, the lid can be fixed to the top of the box body by the limiting mechanism.

Description

Technical Field

[0001] The utility model relates to the field of plastic packaging box technology, specifically to a plastic packaging box that is easy to stack. Background Technology

[0002] Plastic boxed packaging containers have many advantages, including low density, light weight, and ease of processing. They can be transparent or opaque and are widely used in the food packaging industry. The advantage of plastic packaging boxes lies in their ease of molding; different types of containers can be obtained simply by changing the molds, and mass production is easily achievable.

[0003] As described in announcement number CN222934304U, a plug-in plastic packaging box, through the arrangement of a box body, plug-in part, ribs, packaging inner core, card holder, first platform and second platform, allows the plug-in part at the bottom of the upper box body to be plugged into the opening of the lower box body when two boxes are stacked. After the plugging is completed, the first platform is attached to the second platform to provide support, which can improve the stability of stacking. At the same time, the card holder is snapped between the two boxes, making the boxes form an integrated unit. This makes it less likely to tip over when unloading with a forklift. In addition, under the protection of the packaging inner core, it can form a multi-layer cushioning effect with the box body, which can ensure the safety of the goods.

[0004] In the above scheme, when the plastic packaging boxes are stacked, the bottom and top of the boxes will contact each other because the bottom and top dimensions are the same, thus stacking them. However, when the plastic packaging boxes do not contain any goods and are simply stacked to save space, the plastic packaging boxes cannot be nested together because the top and bottom dimensions are the same, and this stacking method takes up more space. Utility Model Content

[0005] The purpose of this utility model is to provide a convenient stackable plastic packaging box to solve the problem mentioned in the background art that when the plastic packaging boxes do not contain goods and are simply stacked to save space, the plastic packaging boxes cannot be nested together because they are the same size at the top and bottom, which takes up a lot of space.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a stackable plastic packaging box, comprising a box body and limiting blocks, wherein a box lid is provided on the top of the box body; rotating plates are rotatably connected to both sides of the bottom of the box body via hinges, and positioning holes are provided inside the rotating plates; multiple sets of positioning blocks are fixedly connected to the top of the box body; a folding fixing mechanism for fixing one angle of the rotating plates is provided at the bottom of the box body; unfolding fixing mechanisms for fixing the rotating plates at the other angle are provided on both sides of the bottom of the box body; the box body and the rotating plates form a rotating structure via hinges; limiting mechanisms for fixing the box lid are provided on both sides.

[0007] Furthermore, the size of the positioning hole is slightly larger than that of the positioning block, and both the positioning block and the positioning hole are conical in shape. The two sides of the box body are inclined, and one side of the rotating plate is wedge-shaped, with the angle of the wedge surface being the same as the angle of the two sides of the box body.

[0008] Furthermore, the folding and fixing mechanism includes multiple sets of limiting blocks fixedly connected to the bottom of the box. A rubber ring is fixedly connected to the outer side of the limiting block, and an annular groove matching the rubber ring is provided on the inner side of the positioning hole. The annular groove is opened inside the rotating plate.

[0009] Furthermore, the unfolding and fixing mechanism includes a magnet a fixedly connected to one side of the rotating plate, and magnets b fixedly connected to both sides of the box body.

[0010] Furthermore, the limiting mechanism includes crossbars on both sides of the box cover, with pins fixedly connected to both ends of the crossbars. The outer side of the pins is slidably connected to the box cover, and one end of the pins engages with a positioning block. The positioning block has a slot that matches the pins inside. A spring is sleeved in the middle of the pins, and one end of the spring abuts against the box cover. The box cover has tapered grooves on both sides that match the positioning blocks.

[0011] Furthermore, a connecting rod is provided on one side of the crossbar. One end of the connecting rod is rotatably connected to the box cover via a pivot. A handle is fixedly connected to one end of the connecting rod. The connecting rod and the box cover form a rotating structure via the pivot. The positioning block and the pin form a locking structure.

[0012] Compared with the prior art, the beneficial effects of this utility model are: when the plastic packaging box is not loaded with goods, the two sets of rotating plates at the bottom can be folded up and fixed, and then inserted into another set of boxes for stacking, thereby reducing the volume after stacking. When the box is loaded with goods, the rotating plates can be unfolded, and then positioned and stacked on top of another set of boxes through the positioning holes. When a single set of boxes is closed at the top, the lid can be fixed to the top of the box through the limiting mechanism.

[0013] 1. When the box is not loaded with goods, the rotating plate is folded up and fixed by the folding and fixing mechanism, so that the bottom size of the box is smaller than the top size. Then, multiple boxes are nested and stacked. Conversely, the rotating plate is unfolded and fixed, so that the top and bottom of the box are the same size. Then, the rotating plate will be positioned and stacked with multiple positioning blocks on the top of the box through the positioning holes in the rotating plate.

[0014] 2. By turning the handle, the connecting rod is rotated, which in turn moves the crossbar on one side. The crossbar will cause the pins at both ends to disengage from the conical groove. Then, the conical holes on both sides of the lid can be aligned with the multiple positioning blocks on the top of the box to complete the sealing of the top of the box. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the box body of this utility model;

[0017] Figure 3 This is a three-dimensional structural diagram of the rotating plate of this utility model;

[0018] Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of the box body of this utility model;

[0019] Figure 5 This utility model Figure 4 Enlarged view of point A;

[0020] Figure 6 This utility model Figure 4 Enlarged view of point B;

[0021] Figure 7 This is a schematic diagram of the three-dimensional cross-sectional structure of the box lid of this utility model.

[0022] In the diagram: 1. Box body; 2. Box lid; 3. Rotating plate; 4. Positioning hole; 5. Limiting block; 6. Magnet a; 7. Magnet b; 8. Positioning block; 9. Connecting rod; 10. Pin; 11. Crossbar; 12. Handle; 13. Spring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1: Please refer to Figures 1-6This utility model provides the following technical solution: a stackable plastic packaging box, including a box body 1 and a limiting block 5. A box cover 2 is provided on the top of the box body 1. Rotating plates 3 are rotatably connected to both sides of the bottom of the box body 1 via hinges. Positioning holes 4 are provided inside the rotating plates 3. Multiple sets of positioning blocks 8 are fixedly connected to the top of the box body 1. A folding and fixing mechanism for fixing one angle of the rotating plates 3 is provided at the bottom of the box body 1. Unfolding and fixing mechanisms for fixing the rotating plates 3 at the other angle are provided on both sides of the bottom of the box body 1. The box body 1 forms a rotating structure with the rotating plates 3 via hinges. The size of the positioning holes 4 is slightly larger than that of the positioning blocks 8, and both the positioning blocks 8 and the positioning holes 4 are conical in shape. The sides of the box body 1 are inclined. One side of the moving plate 3 is wedge-shaped, and the angle of the wedge surface is the same as the angle of both sides of the box body 1. This conveniently stackable plastic packaging box can be stacked in two states: one is when there is no goods loaded, in which case the rotating plate 3 is folded up and fixed by the folding and fixing mechanism, and then multiple sets of box bodies 1 are nested together; the other is when there are goods loaded, in which case the rotating plate 3 needs to be unfolded and fixed by the unfolding and fixing mechanism. At this time, the box body 1 is the same size from top to bottom, and the positioning hole 4 in the rotating plate 3 will correspond to the position of multiple sets of positioning blocks 8 on the top of the box body 1. Two sets of box bodies 1 can be positioned by the positioning hole 4 and the positioning block 8, thereby stacking together and enhancing the stability of the stack. At the same time, the conical positioning block 8 and the positioning hole 4 can be more easily connected.

[0025] Please see Figure 1 and Figures 3-5 The folding and fixing mechanism includes multiple sets of limiting blocks 5 fixedly connected to the bottom of the box body 1. A rubber ring is fixedly connected to the outer side of the limiting block 5. An annular groove matching the rubber ring is provided on the inner side of the positioning hole 4, and the annular groove is opened inside the rotating plate 3. When the rotating plate 3 needs to be folded, the rotating plate 3 is pulled to rotate, so that the positioning hole 4 inside the rotating plate 3 aligns with the limiting block 5. When the rubber ring on the outer side of the limiting block 5 contacts the annular groove on the inner side of the positioning hole 4, the two will engage. At this time, the rotating plate 3 will be folded and fixed to the bottom of the box body 1. The size of the bottom of the box body 1 will be smaller than the top, and two sets of box bodies 1 can be nested and stacked to reduce the volume after stacking.

[0026] Please see Figures 1-4 and Figure 6 The unfolding and fixing mechanism includes a magnet a6 fixedly connected to one side of the rotating plate 3, and magnets b7 fixedly connected to both sides of the box body 1. When it is necessary to unfold the rotating plate 3, the wedge-shaped surface on one side of the rotating plate 3 is made to fit against the inclined surfaces on both sides of the box body 1 by rotating the rotating plate 3. When the magnet a6 on one side of the rotating plate 3 contacts the magnet b7 on one side of the box body 1, the two will attract each other, thereby completing the unfolding and fixing of the rotating plate 3. At this time, the bottom size of the box body 1 will be the same as the top size, and it can be stacked in another form, thereby preventing the bottom of one set of box bodies 1 from entering the interior of another set of box bodies 1 and causing compression of the goods.

[0027] By performing the above operations, different stacking methods can be selected depending on whether the plastic packaging boxes are loaded with goods.

[0028] Example 2:

[0029] Please see Figure 1 and Figure 7 Based on Embodiment 1, a top-sealing structure for a single box body 1 is also disclosed, the specific structure of which is as follows: Limiting mechanisms for fixing the box cover 2 are provided on both sides. The limiting mechanisms include horizontal bars 11 on both sides of the box cover 2, with pins 10 fixedly connected to both ends of the horizontal bars 11. The outer side of the pins 10 is slidably connected to the box cover 2, and one end of the pins 10 engages with a positioning block 8. A slot matching the pins 10 is provided inside the positioning block 8. A spring 13 is sleeved in the middle of the pins 10, and one end of the spring 13 abuts against the box cover 2. Conical grooves matching the positioning block 8 are provided on both sides of the box cover 2. A connecting rod 9 is provided on one side of the horizontal bars 11. One end of the connecting rod 9 is rotatably connected to the box cover 2 via a pivot. A handle 12 is fixedly connected to one end of the connecting rod 9. The connecting rod 9 and the box cover 2 form a rotating structure via the pivot, and the positioning block 8 and the pins 10 form an engaging structure.

[0030] Please see Figure 1 and Figure 7 This stackable plastic packaging box, when loading goods in a single set of plastic packaging boxes, requires sealing the top of the goods. It should be noted that when multiple sets of plastic packaging boxes containing goods are stacked, since the top plastic packaging box will cover the top of the bottom plastic packaging box through its bottom surface, there is no need to add a box cover 2 to seal it. By turning the handle 12, the handle 12 will drive the connecting rod 9 to rotate, thereby moving the crossbar 11 on one side. When the crossbar 11 moves, it will drive the pins 10 at both ends to move inside the box cover 2 and compress the spring 13. When the end of the pin 10 is disengaged from the conical groove, the conical holes on both sides of the box cover 2 can be connected with the multiple sets of positioning blocks 8 on the top of the box body 1. After the connection is completed, the handle 12 can be released. At this time, the spring 13 will drive the pins 10 to move and engage with the positioning blocks 8, thereby fixing the box cover 2 to the top of the box body 1 and completing the sealing of the top of the box body 1. In this way, the top of a single set of box body 1 can be sealed through the above operation.

[0031] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A stackable plastic packaging box, comprising a box body (1) and a limiting block (5), wherein a box lid (2) is provided on the top of the box body (1). Its features are: The bottom sides of the box (1) are rotatably connected to rotating plates (3) via hinges. The rotating plates (3) have positioning holes (4) inside. The top of the box (1) is fixedly connected to multiple sets of positioning blocks (8). The bottom of the box (1) is provided with a folding fixing mechanism for fixing one angle of the rotating plates (3). The bottom sides of the box (1) are provided with unfolding fixing mechanisms for fixing the other angle of the rotating plates (3). The box (1) forms a rotating structure with the rotating plates (3) via hinges. The lid (2) is provided with limiting mechanisms on both sides for fixing it.

2. The stackable plastic packaging box according to claim 1, characterized in that: The size of the positioning hole (4) is slightly larger than that of the positioning block (8), and the shape of both the positioning block (8) and the positioning hole (4) is conical. The two sides of the box body (1) are inclined, and one side of the rotating plate (3) is wedge-shaped, and the angle of the wedge surface is the same as the angle of the two sides of the box body (1).

3. A stackable plastic packaging box according to claim 1, characterized in that: The folding and fixing mechanism includes multiple sets of limiting blocks (5) fixedly connected to the bottom of the box body (1). A rubber ring is fixedly connected to the outside of the limiting block (5). An annular groove matching the rubber ring is provided on the inside of the positioning hole (4), and the annular groove is opened inside the rotating plate (3).

4. A stackable plastic packaging box according to claim 1, characterized in that: The unfolding and fixing mechanism includes a magnet a (6) fixedly connected to one side of the rotating plate (3), and magnets b (7) fixedly connected to both sides of the box body (1).

5. A stackable plastic packaging box according to claim 1, characterized in that: The limiting mechanism includes a crossbar (11) on both sides of the cover (2). Both ends of the crossbar (11) are fixedly connected with pins (10). The outer side of the pin (10) is slidably connected to the cover (2). One end of the pin (10) is engaged with the positioning block (8). The positioning block (8) has a slot that matches the pin (10) inside. A spring (13) is sleeved in the middle of the pin (10). One end of the spring (13) abuts against the cover (2). The cover (2) has tapered grooves that match the positioning block (8) on both sides.

6. A stackable plastic packaging box according to claim 5, characterized in that: A connecting rod (9) is provided on one side of the crossbar (11). One end of the connecting rod (9) is rotatably connected to the box cover (2) through a rotating shaft. A handle (12) is fixedly connected to one end of the connecting rod (9). The connecting rod (9) and the box cover (2) form a rotating structure through the rotating shaft. The positioning block (8) and the pin (10) form a locking structure.

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