A carton bottom folding system
By designing a bottom folding system for packaging boxes and using automated devices to achieve fully automated folding of the packaging boxes, the problem of low efficiency of manual operation is solved, production efficiency is improved and costs are reduced, and it can adapt to different carton sizes to meet the needs of large-scale production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG HANDSOME INTELLIGENT EQUIP CO LTD
- Filing Date
- 2025-06-24
- Publication Date
- 2026-07-31
AI Technical Summary
In existing technologies, the folding process of packaging boxes relies on manual operation, which is inefficient and has high labor costs, making it difficult to meet the needs of large-scale production or rapid packaging, especially in high-frequency application scenarios such as e-commerce logistics and food packaging.
A bottom folding system for packaging boxes was designed, including a first folding mechanism for the box panels, a second folding mechanism for the box panels, a clamping distance adjustment device, and a box panel folding and holding mechanism. The system achieves automatic folding and conveying of the front, back, left, and right sides of the carton through automated devices. It adopts components such as an inclined bending device, a folding device, and a belt conveyor to achieve fully automated operation.
It enables automated folding of packaging box panels, which is fast, efficient, and provides stable folding quality. It requires no manual operation, reduces labor costs, adapts to different carton sizes, and meets the needs of large-scale production.
Smart Images
Figure CN224576918U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of packaging box sealing technology, and in particular to a packaging box bottom folding system. Background Technology
[0002] The top of a cardboard box is called the "top cover," and the bottom is called the "bottom cover." Its bottom structure typically consists of a front panel, a back panel, a left side panel, and a right side panel. Initially, the cardboard box is a flat piece of cardboard material. In actual packaging operations, the flat box needs to be unfolded and stood upright. Then, the front, back, left, and right side panels are manually glued or secured to form a stable three-dimensional cardboard box structure. This process currently relies heavily on manual operation, which presents the following technical drawbacks and efficiency bottlenecks:
[0003] 1. Low efficiency of manual operation: Due to the need to manually fold, align and glue each box, the operation speed is limited by the worker's skill level and physical strength, making it difficult to meet the needs of large-scale production or rapid packaging. This efficiency problem is particularly prominent in high-frequency application scenarios such as e-commerce logistics and food packaging.
[0004] 2. High labor costs: Relying on manual labor for repetitive tasks not only increases the company's labor costs, but may also affect production continuity due to labor shortages or long training cycles.
[0005] Therefore, there is an urgent need to develop a device that can automatically fold the panels of a packaging box to solve the problems of low efficiency, high cost, and unstable quality in the existing technology, and to promote the development of the packaging industry towards automation and intelligence.
[0006] Against this background, the present invention proposes a new technical solution. Utility Model Content
[0007] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a bottom folding system for packaging boxes, and the technical solution adopted is as follows:
[0008] A bottom folding system for a packaging box, comprising:
[0009] The first folding mechanism for the carton includes a first frame, on which an inclined bending and folding device is provided. The inclined bending and folding device is used to bend and fold the front and rear panels of the unfolded vertical carton body that fall on it and place them on the first frame.
[0010] The second folding mechanism for the carton includes a pair of vertical clamping frames. A conveying device and a folding device are provided on the pair of vertical clamping frames. The conveying device can transport the unfolded vertical carton body that falls between the pair of vertical clamping frames from the front end to the rear end of the vertical clamping frames. The folding device can fold the left and right side panels of the unfolded vertical carton body that falls between the pair of vertical clamping frames from the outside to the inside at a 90° angle so that they are stacked on the front and rear panels.
[0011] The clamping distance adjustment device adjusts the distance between a pair of vertical clamping frames to limit the clamping distance of the conveying device.
[0012] According to an embodiment of the present utility model, a bottom folding system for a packaging box further includes a box panel folding and holding mechanism. The box panel folding and holding mechanism is connected between a first box panel folding mechanism and a second box panel folding mechanism. It is used to transfer the unfolded vertical carton body on the first box panel folding mechanism to the second folding mechanism and keep the front and rear panels of the unfolded vertical carton body in a folded state.
[0013] According to an embodiment of the present utility model, a bottom folding system for a packaging box includes a tilting bending folding device comprising a front tilting guide plate and a rear tilting guide plate disposed on the front and rear sides of a first frame. The front tilting guide plate and the rear tilting guide plate are tilted relative to the first frame. The bottom of the front tilting guide plate can be controlled to rotate from a tilted state to a flat state that is level with or lower than the first frame.
[0014] According to an embodiment of the present invention, a bottom folding system for a packaging box is provided below a first frame. The bottom of the front tilting guide plate extends to the bottom of the first frame, and its middle part is hinged to the first frame. A first driving cylinder is provided below the first frame. The first driving cylinder is connected to the bottom of the front tilting guide plate and can drive the bottom of the front tilting guide plate to move so that the front tilting guide plate rotates about the hinge point as the axis, so that the front tilting guide plate is raised upward in a tilted state or placed downward in a horizontal state.
[0015] According to an embodiment of the present invention, a bottom folding system for a packaging box is provided on both sides of the first frame, and the limiting frame and the first frame support have a limiting space to accommodate the left and right side panels of the three-dimensional cardboard box.
[0016] According to an embodiment of the present invention, a bottom folding system for a packaging box is provided, wherein the conveying device is a belt conveyor device respectively disposed on a pair of vertical clamping frames, the belt conveyor device extends along the length direction of the vertical clamping frames, and the two belt conveyor devices define the clamping and transporting unfolded vertical carton body.
[0017] According to an embodiment of the present invention, a bottom folding system for a packaging box includes a folding plate respectively disposed on a pair of vertical clamping frames and a folding drive device for driving the folding plate to bend from the outside to the inside. The pair of folding plates fold the left and right sides of the unfolded vertical carton body located between the pair of vertical clamping frames from the outside to the inside at a 90° angle so that they are stacked on the front and rear panels.
[0018] According to an embodiment of the present invention, a bottom folding system for a packaging box includes a clamping distance adjustment device comprising two movable slides disposed at the bottom of one of the vertical clamping frames. The bottom of the vertical clamping frame is slidably connected to the movable slides via a sliding plate. A connecting rod is connected between the two sliding plates, and a displacement driving device is connected to the connecting rod. The displacement driving device drives the connecting rod to move the sliding plate on the movable slide to adjust the distance between a pair of vertical clamping frames.
[0019] According to an embodiment of the present invention, a bottom folding system for a packaging box includes a displacement driving device comprising a conveyor belt mounting base, a driving wheel and a driven wheel mounted on the conveyor belt mounting base, and a displacement conveyor belt disposed between the driving wheel and the driven wheel; a fixed frame is provided on the displacement conveyor belt, and the fixed frame is fixedly connected to a connecting rod; a drive motor is provided on the side of the vertical clamping frame to drive the driving wheel to rotate and drive the displacement conveyor belt to move.
[0020] According to an embodiment of the present utility model, a bottom folding system for a packaging box includes a box panel folding and holding mechanism comprising a middle frame connected to the rear end of a first frame and extending from the first frame toward the rear end of a vertical clamping frame.
[0021] Compared with the prior art, the beneficial effects of this utility model are:
[0022] This invention folds the front and rear panels of a vertical three-dimensional cardboard box using a first folding mechanism, and folds the left and right sides of the box using a second folding mechanism. A conveying device on top of the mechanism transports the vertical three-dimensional cardboard box, thus achieving folding of each panel from the bottom of the three-dimensional cardboard box. In addition, the clamping distance of the second folding mechanism can be adjusted using a clamping distance adjustment device. The entire process is automated, requiring no manual operation, and is fast, efficient, and provides stable folding quality. Attached Figure Description
[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0024] Figure 1 A schematic diagram showing a robotic arm vertically unfolding a flat cardboard box.
[0025] Figure 2 This is a perspective view of some embodiments of the present utility model. Figure 1 ;
[0026] Figure 3 This is a perspective view of some embodiments of the present utility model. Figure 2 ;
[0027] Figure 4 This is a perspective view of some embodiments of the present utility model. Figure 3 ;
[0028] Figure 5 This is a schematic diagram of the structure of the first folding mechanism of the box panel in some embodiments of this utility model. Figure 1 (part);
[0029] Figure 6 This is a schematic diagram of the structure of the first folding mechanism of the box panel in some embodiments of this utility model. Figure 2 (part);
[0030] Figure 7 This is a schematic diagram of the structure of the second folding mechanism of the box panel in some embodiments of this utility model. Figure 1 ;
[0031] Figure 8 This is a schematic diagram of the structure of the second folding mechanism of the box panel in some embodiments of this utility model. Figure 2 .
[0032] Explanation of key component symbols:
[0033] 10. First folding mechanism for box panel; 11. First frame; 12. Forward inclined guide plate; 13. Rear inclined guide plate; 14. First drive cylinder; 15. Limiting frame; 20. Second folding mechanism for box panel; 21. Vertical clamping frame; 22. Belt conveyor device; 23. Folding plate; 24. Folding drive device; 30. Clamping distance adjustment device; 31. Moving slide; 32. Slide plate; 33. Connecting rod; 34. Conveyor belt mounting base; 35. Drive wheel; 36. Driven wheel; 37. Displacement conveyor belt; 38. Fixed frame; 39. Drive motor; 40. Robotic arm; 50. Middle frame. Detailed Implementation
[0034] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
[0035] The orientation shown in the accompanying drawings should not be construed as limiting the specific protection scope of this utility model, but is only for reference and understanding of preferred embodiments. The product components shown in the drawings can be changed in position, increased in number, or simplified in structure.
[0036] The “connection” described in the specification and the “connection” relationship between the components shown in the accompanying drawings can be understood as a fixed connection, a detachable connection, or a connection that forms an integral unit; it can be a direct connection or a connection through an intermediate medium. Those skilled in the art can understand the connection relationship according to the specific circumstances and can derive different implementation methods such as screwing, riveting, welding, snap-fitting, or embedding to suitably replace the connection.
[0037] The directional terms such as up, down, left, right, top, and bottom mentioned in the instruction manual and the directions shown in the attached drawings indicate that the components can directly contact each other or contact each other through other features; for example, "up" can mean directly above or diagonally above, or it simply means above other objects; other directions can be understood by analogy.
[0038] The materials used to manufacture solid-shaped parts as shown in the specification and drawings may be metallic, non-metallic, or other synthetic materials. The machining processes used for solid-shaped parts may include stamping, forging, wire cutting, laser cutting, casting, injection molding, CNC milling, 3D printing, machining, etc. Those skilled in the art may adapt or combine the above materials and manufacturing processes according to different processing conditions, costs, and precision requirements.
[0039] This utility model provides a bottom folding system for packaging boxes, such as Figures 2 to 8 As shown, including
[0040] The first folding mechanism 10 for the carton includes a first frame 11, on which an inclined bending and folding device is provided. The inclined bending and folding device is used to bend and fold the front and rear panels of the unfolded vertical carton body that fall on it and let them fall onto the first frame 11.
[0041] The second folding mechanism 20 for the carton includes a pair of vertical clamping frames 21. A conveying device and a folding device are provided on the pair of vertical clamping frames 21. The conveying device can transport the unfolded vertical carton body that falls between the pair of vertical clamping frames 21 from the front end to the rear end of the vertical clamping frames 21. The folding device can fold the left and right side panels of the unfolded vertical carton body that falls between the pair of vertical clamping frames 21 from the outside to the inside at a 90° angle so that they are stacked on the front and rear panels.
[0042] The clamping distance adjustment device 30 adjusts the distance between a pair of vertical clamping frames 21 to limit the clamping distance of the conveying device.
[0043] During operation, the flat cardboard box is vertically unfolded using a robotic arm (40) or manually, so that it is open at the top and bottom and not folded (e.g., Figure 1 , 2The vertical three-dimensional cardboard box (as shown) is then placed at the first folding mechanism 10 of the box board. The inclined bending folding device set on the first frame 11 bends the front and rear panels of the vertical three-dimensional cardboard box from the outside to the inside and from the bottom to the top, until the vertical three-dimensional cardboard box is completely placed on the first frame 11. The front and rear panels of the vertical three-dimensional cardboard box are bent at 90° below the cardboard box. Then, the front and rear panels, with the front and rear panels in a 90° bent position, enter between a pair of vertical clamping frames 21 of the second folding mechanism 20 of the box board. The conveying device conveys the vertical three-dimensional cardboard box from the front end to the rear end of the vertical clamping frame 21. During the conveying process, the folding device folds the left and right panels of the vertical three-dimensional cardboard box at 90°. At this time, the front, rear, left, and right panels of the vertical three-dimensional cardboard box are all folded at 90°. Finally, it is sent to the automatic tape sealing device for sealing. In addition, since different cartons have different sizes and widths, in order to adapt to the clamping and conveying of different cartons, the clamping distance adjustment device 30 can adjust the distance between a pair of vertical clamping frames 21, thereby adjusting the clamping and conveying distance of the conveying device.
[0044] This invention folds the front and rear panels of a vertical three-dimensional cardboard box using a first folding mechanism 10, and folds the left and right sides of the box using a second folding mechanism 20. A conveying device on the mechanism transports the vertical three-dimensional cardboard box, thus achieving folding of each panel from the bottom of the three-dimensional cardboard box. In addition, the clamping distance adjustment device 30 can be used to adjust the clamping distance of the second folding mechanism. The entire process is automated, requiring no manual operation, and is fast, efficient, and provides stable folding quality.
[0045] In one embodiment of this utility model, such as Figures 2 to 6 As shown, the inclined bending and folding device includes a front inclined guide plate 12 and a rear inclined guide plate 13 disposed on the front and rear sides of the first frame 11. The front inclined guide plate 12 and the rear inclined guide plate 13 are inclined relative to the first frame 11. The bottom of the front inclined guide plate 12 can be controlled to rotate from the inclined state to the flat state, which is level with or lower than the first frame 11.
[0046] Specifically, the external force for constructing the vertical three-dimensional cardboard box is applied between the front inclined guide plate 12 and the rear inclined guide plate 13. This means the front and rear panels of the bottom of the vertical three-dimensional cardboard box are placed between these two plates. During their descent, the front and rear panels encounter resistance from the front and rear inclined guide plates 12 and 13. Under the inclined guiding action of these plates, they both bend inwards. When the vertical three-dimensional cardboard box is completely placed on the first frame 11, the front and rear panels are folded at 90° and rest on the first frame 11. At this point, the left and right side panels of the vertical three-dimensional cardboard box are positioned on either side of the first frame 11. Limiting frames 15 are provided on both sides of the first frame 11, and these limiting frames 15 have a limiting space with the support of the first frame 11 to accommodate the left and right side panels of the three-dimensional cardboard box.
[0047] In one embodiment of this utility model, such as Figure 5 , 6 As shown, a hinge frame is provided below the first frame 11. The bottom of the front tilt guide plate 12 extends to the bottom of the first frame 11, and its middle part is hinged to the first frame 11. A first drive cylinder 14 is provided below the first frame 11. The first drive cylinder 14 is connected to the bottom of the front tilt guide plate 12. It can drive the bottom of the front tilt guide plate 12 to move, so that the front tilt guide plate 12 rotates about the hinge point as the axis, so that the front tilt guide plate 12 is raised upward in a tilted state, or placed downward in a horizontal state. In order to ensure that the front end of the first frame 11 is unobstructed, after the front and rear panels of the vertical three-dimensional carton are obstructed and bent by the front tilting guide plate 12 and the rear tilting guide plate 13, the first drive cylinder 14 drives the bottom of the front tilting guide plate 12 to move. In this way, the front tilting guide plate 12 will rotate and swing down around the hinge point until it is level with the first frame 11. After the front and rear panels have completed a 90° fold and sit on the first frame 11, the vertical three-dimensional carton is pushed towards the second folding mechanism by external force.
[0048] In one embodiment of this utility model, such as Figure 3 , 4 As shown in Figures 7 and 8, the conveying device is a belt conveyor 22 respectively installed on a pair of vertical clamping frames 21. The belt conveyor 22 extends along the length of the vertical clamping frame 21, and the two belt conveyors 22 limit the clamping and transport of the unfolded vertical carton.
[0049] In one embodiment of this utility model, such as Figure 3 , 4As shown in Figures 7 and 8, the folding device includes folding plates 23 respectively disposed on a pair of vertical clamping frames 21 and a folding drive device 24 that drives the folding plates 23 to bend from the outside to the inside. The pair of folding plates 23 fold the left and right sides of the unfolded vertical carton body located between the pair of vertical clamping frames 21 from the outside to the inside at a 90° angle so that they are stacked on the front and rear panels.
[0050] After being delivered to the second folding structure, the upright three-dimensional carton actually enters between a pair of upright clamping frames 21, where it is limited and transported by the belt conveyor 22 on the pair of upright clamping frames 21, and is sent from the front end of the upright clamping frames 21 to the end. Under normal conditions, the folding plate 23 is in a drooping state. During the transport process, the folding drive device 24 drives the folding to fold the left and right sides of the three-dimensional carton from the outside to the inside by 90°, so that it is stacked on the front and back plates. At the same time, the upright three-dimensional carton continues to be transported by the belt conveyor 22, and the length of the folding plate 23 is sufficient to ensure that the upright three-dimensional carton can still be folded and pressed against the left and right sides during transport to prevent it from falling and to maintain its folded state.
[0051] In one embodiment of this utility model, such as Figure 3 , 4 As shown in Figures 5 and 6, the bottom folding system of the packaging box further includes a box panel folding and holding mechanism. This mechanism is connected between the first box panel folding mechanism 10 and the second box panel folding mechanism 20. It is used to transfer the unfolded upright carton body on the first box panel folding mechanism 10 to the second folding mechanism, and to keep the front and rear panels of the unfolded upright carton body folded. The box panel folding and holding mechanism includes a middle frame 50, which is connected to the rear end of the first frame 11. The middle frame 50 extends from the first frame 11 towards the rear end of the vertical clamping frame 21, and is positioned between the two vertical clamping frames 21.
[0052] After the front and rear panels are folded at 90° and placed on the first frame 11, the vertical three-dimensional carton is pushed by external force along the extension direction of the first frame 11 towards the second folding mechanism 20 of the carton panel. On the second folding mechanism 20 of the carton panel, the vertical three-dimensional carton is transported by a conveying device along the front end of the vertical clamping frame 21 to the rear end. During this process, the front and rear panels of the vertical three-dimensional carton are placed on the middle frame 50, and both the front and rear panels are kept in a folded state under the action of the middle frame 50.
[0053] In one embodiment of this utility model, such as Figure 3 , 4As shown in Figures 7 and 8, the clamping distance adjustment device 30 includes two movable slides 31 disposed at the bottom of one of the vertical clamping frames 21. The bottom of the vertical clamping frame 21 is slidably connected to the movable slides 31 via a sliding plate 32. A connecting rod 33 is connected between the two sliding plates 32, and a displacement driving device is connected to the connecting rod 33. The displacement driving device drives the connecting rod 33 to move the sliding plate 32 on the movable slides 31 to adjust the distance between the pair of vertical clamping frames 21. Specifically, the displacement driving device includes a conveyor belt mounting base 34, a driving wheel 35 and a driven wheel 36 disposed on the conveyor belt mounting base 34, and a displacement conveyor belt 37 disposed between the driving wheel 35 and the driven wheel 36. A fixing frame 38 is provided on the displacement conveyor belt 37, and the fixing frame 38 is fixedly connected to the connecting rod 33. A drive motor 39 is provided on the side of the vertical clamping frame 21 to drive the driving wheel 35 to rotate and drive the displacement conveyor belt 37 to move.
[0054] When adjustment is required, the drive motor 39 drives the drive wheel 35 to rotate. The drive wheel 35, the driven wheel 36, and the displacement conveyor belt 37 move synchronously. When the displacement conveyor belt 37 moves, it drives the fixed frame 38 to move. The movement of the fixed frame 38 drives the connecting rod 33 to move. The connecting rod 33 drives the slide plate 32 to move on the moving slide 31, thereby enabling the vertical clamping frame 21 to move within the stroke of the moving slide 31, and realizing the adjustment of the distance between a pair of vertical clamping frames 21.
[0055] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made to the present invention without departing from the principles and spirit of the present invention as defined by the claims. Therefore, the detailed description of the embodiments in this disclosure is for explanation only and not for limiting the present invention, but rather the scope of protection is defined by the content of the claims.
Claims
1. A bottom folding system for a packaging box, characterized in that, Including The first folding mechanism (10) for the carton includes a first frame (11) and an inclined bending folding device is provided on the first frame (11). The inclined bending folding device is used to bend and fold the front and back panels of the unfolded upright carton body that fall on it and place them on the first frame (11). The second folding mechanism (20) for the carton includes a pair of vertical clamping frames (21). A conveying device and a folding device are provided on the pair of vertical clamping frames (21). The conveying device can send the unfolded vertical carton body that falls between the pair of vertical clamping frames (21) from the front end to the rear end of the vertical clamping frame (21). The folding device can fold the left and right sides of the unfolded vertical carton body that falls between the pair of vertical clamping frames (21) from the outside to the inside at 90° so that they are stacked on the front and rear panels. The clamping distance adjustment device (30) adjusts the distance between a pair of vertical clamping frames (21) to limit the clamping distance of the conveying device.
2. The bottom folding system for a packaging box according to claim 1, characterized in that, It also includes a box panel folding and holding mechanism, which is connected between the first box panel folding mechanism (10) and the second box panel folding mechanism (20). It is used to transfer the unfolded vertical carton body on the first box panel folding mechanism (10) to the second folding mechanism and keep the front and rear panels of the unfolded vertical carton body folded.
3. The bottom folding system for a packaging box according to claim 2, characterized in that, The inclined bending and folding device includes a front inclined guide plate (12) and a rear inclined guide plate (13) disposed on the front and rear sides of the first frame (11). The front inclined guide plate (12) and the rear inclined guide plate (13) are inclined relative to the first frame (11). The bottom of the front inclined guide plate (12) can be controlled to rotate from the inclined state to the flat state, which is level with or lower than the first frame (11).
4. The bottom folding system for a packaging box according to claim 3, characterized in that, A hinge frame is provided below the first frame (11). The bottom of the front tilt guide plate (12) extends to the bottom of the first frame (11), and its middle part is hinged to the first frame (11). A first drive cylinder (14) is provided below the first frame (11). The first drive cylinder (14) is connected to the bottom of the front tilt guide plate (12). It can drive the bottom of the front tilt guide plate (12) to move so that the front tilt guide plate (12) rotates around the hinge point as the axis, so that the front tilt guide plate (12) is raised upward in an inclined state, or placed downward in a horizontal state.
5. A bottom folding system for a packaging box according to claim 3, characterized in that, Limiting frames (15) are provided on both sides of the first frame (11). The limiting frames (15) and the support of the first frame (11) have a limiting space to accommodate the left and right side panels of the three-dimensional cardboard box.
6. A bottom folding system for a packaging box according to claim 1, characterized in that, The conveying device is a belt conveyor (22) respectively set on a pair of vertical clamping frames (21). The belt conveyor (22) extends along the length of the vertical clamping frame (21), and the two belt conveyors (22) limit the clamping and transport of the unfolded vertical carton.
7. A bottom folding system for a packaging box according to claim 3, characterized in that, The folding device includes folding plates (23) respectively set on a pair of vertical clamping frames (21) and a folding drive device (24) that drives the folding plates (23) to bend from the outside to the inside. The pair of folding plates (23) fold the left and right sides of the unfolded vertical carton body between the pair of vertical clamping frames (21) from the outside to the inside at 90° so that they are stacked on the front and rear panels.
8. A bottom folding system for a packaging box according to claim 1, characterized in that, The clamping distance adjustment device (30) includes two movable slides (31) disposed at the bottom of one of the vertical clamping frames (21). The bottom of the vertical clamping frame (21) is slidably connected to the movable slides (31) via a sliding plate (32). A connecting rod (33) is connected between the two sliding plates (32). A displacement driving device is connected to the connecting rod (33). The displacement driving device drives the connecting rod to move the sliding plate (32) on the movable slide (31) to adjust the distance between the pair of vertical clamping frames (21).
9. A bottom folding system for a packaging box according to claim 8, characterized in that, The displacement drive device includes a conveyor belt mounting base (34), a drive wheel (35) and a driven wheel (36) mounted on the conveyor belt mounting base (34), and a displacement conveyor belt (37) disposed between the drive wheel (35) and the driven wheel (36); a fixed frame (38) is provided on the displacement conveyor belt (37), and the fixed frame (38) is fixedly connected to the connecting rod (33); a drive motor (39) is provided on the side of the vertical clamping frame (21) to drive the drive wheel (35) to rotate and drive the displacement conveyor belt (37) to move.
10. A bottom folding system for a packaging box according to claim 7, characterized in that, The box panel folding and holding mechanism includes a middle frame (50), which is connected to the rear end of the first frame (11) and extends from the first frame (11) toward the rear end of the vertical clamping frame (21).