A bottom box of a buckle

Abstract

The application discloses a bottom closing device of a bottom closing box, which comprises a carton conveying mechanism for conveying the opened box body, a pre-folding assembly arranged on one side of the carton conveying mechanism and a bottom closing assembly arranged behind the pre-folding assembly along the advancing direction of the box body. The pre-folding assembly comprises a push plate, a horizontal push head and a bottom push plate which are pushed by driving members and are used for sequentially folding and covering the upper half cover piece, the folding ear and the lower half cover piece of one end of the box body on the mouth surface of the box body. The bottom closing assembly comprises an insertion plate which is pushed by a driving member and is used for pushing the rectangular insertion tongue on the lower half cover piece and the triangular insertion tongue on the folding ear into the box body from the gap of the upper half cover piece.

Description

Technical Field

[0001] This application relates to the field of packaging machinery technology, specifically to a bottom-locking device for a box. Background Technology

[0002] Packaging boxes are paper containers used for secondary packaging of materials and are now widely used. One type of box is called a snap-bottom box (also known as a self-locking bottom box), such as... Figure 4 As shown, this type of box typically includes a box body 4, an upper half-cover body 5 formed on the side wall of the opening of the box body 4, flaps 9 on both side walls, and a lower half-cover body 7 on the lower side wall. A notch 6 is formed in the middle of the opening edge of the upper half-cover body 5, and a triangular tongue 10 is formed in the flap 9. A rectangular tongue 8 is formed in the middle of the opening edge of the lower half-cover body 7. Compared to bottom-pack boxes, this type of box has the advantages of strong load-bearing capacity and the ability to be stacked for transport. A cartoning machine is an automated device used to load materials that have already undergone one-time packaging into packaging cartons, such as... Figure 1 As shown, existing cartoning machines all have a box blank hopper 2 for storing flat-folded packaging cartons and a box blank picking mechanism 3 for taking the box blanks out of the box blank hopper 2 and opening the carton (the box blanks are opened from a flat-folded state to a three-dimensional state) and placing the opened carton body into the carton conveying mechanism 1. The carton conveying mechanism 1 generally includes a conveyor chain 101 arranged in parallel, a pusher plate 102 spaced on the conveyor chain 101, and a bottom guide rail 104 for auxiliary support during the packaging process. The spacing between the pusher plates 102 is adapted to the size of the packaging carton body to push the packaging carton forward. However, due to structural reasons, the closing device of the existing cartoning machine cannot complete the bottom closing of the bottom-clamping box type. Therefore, it is necessary to solve this problem. Utility Model Content

[0003] The purpose of this application is to provide a bottom-locking device for a bottom-locking box to solve the problems in the prior art.

[0004] To achieve the above objectives, this application provides the following technical solution: a bottom-fastening device for a box, comprising a paper box conveying mechanism for conveying an opened box, a pre-folding component disposed on one side of the paper box conveying mechanism, and a bottom-fastening component disposed behind the pre-folding component along the box's traveling direction. The pre-folding component includes a top push plate, a horizontal push head, and a bottom push plate pushed by a driving member, for sequentially folding the upper half cover, the folded ear, and the lower half cover at one end of the box to close the opening of the box. The bottom-fastening component includes an insert plate pushed by a driving member, for pushing the rectangular tongue on the lower half cover, together with the triangular tongue on the folded ear, into the box through the notch of the upper half cover.

[0005] Furthermore, the bottom-fastening device for the box also includes a side guide rail located on the other side of the paper box conveying mechanism 1 and extending longitudinally along the paper box conveying mechanism, used to abut the other end of the box body when the pre-folding component is activated; it also includes a rear guide plate located on the same side as the pre-folding component, located behind the pre-folding component along the direction of travel of the box body, and extending longitudinally along the paper box conveying mechanism, used to keep the pre-folded upper cover, the folded ear, and the lower cover in a pre-folded completed state when the box body reaches the position of the bottom-fastening component, the rear guide plate is provided with a through groove for the insertion plate to pass through, and the end of the rear guide plate facing the pre-folding component has an outwardly extending guide portion.

[0006] Furthermore, the top push plate is located above the box body, and its movement trajectory is in the up-down direction. It is used to bend the upper half of the cover plate on the box body towards the inside of the box body opening. There are two horizontal push heads, located in the horizontal middle of the box body's travel direction. The trajectory lines of the two horizontal push heads are in a figure-eight shape that converges from the outside of the box body towards the box body opening. They are used to fold the folded ears on both sides of the box body inward to cover the outer surface of the bent upper half of the cover plate. The bottom push plate is located below the two horizontal push heads and is used to push the lower half of the cover plate of the box body obliquely upward from the lower part of the box body, so that the lower half of the cover plate bends towards the box body opening and covers the outside of the bent folded ears.

[0007] Furthermore, the insert plate is a horizontally arranged flat plate structure with a width that matches the notch, and both corners at the end furthest from the drive component are rounded.

[0008] Furthermore, the lower end of the push plate is formed with a leading surface that extends outward toward the opening of the box to gradually fold the upper cover body.

[0009] Furthermore, the front end of the horizontal pusher has a spherical structure.

[0010] Furthermore, the driving component is a cylinder, and each cylinder is connected to the frame via a corresponding support.

[0011] Furthermore, the cylinders used to drive the top push plate, the bottom push plate, and the insert plate are cylinders with guide rods.

[0012] The beneficial technical effects of this application are as follows: The bottom-fastening device provided by this application completes the action of sequentially folding the upper cover, the folded ear, and the lower cover into the box opening by forming a pre-folding assembly consisting of a top push plate, a horizontal push head, and a bottom push plate arranged in three dimensions. Then, the insert plate of the box-fastening assembly pushes the rectangular tongue on the lower cover and the triangular tongue on the folded ear into the box through the notch of the upper cover, so that the rectangular tongue and the triangular tongue are locked inside the notch of the upper cover, completing the bottom-fastening action. It has the advantages of good bottom-fastening stability, no damage to the paper, and high production efficiency. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the bottom-locking device of the box in this application installed on a cartoning machine (without the box body placed); Figure 2 This is a schematic diagram of the bottom-locking device of the bottom box in this application; Figure 3 This is a schematic diagram from another perspective of the bottom-locking device of the bottom box in this application; Figure 4 A schematic diagram of the bottom-fastening process of the bottom-fastening device for the bottom box in this application; Figure 5 for Figure 1 Enlarged view of a section at point F in the middle; In the diagram: 1. Carton conveying mechanism; 101. Conveyor chain; 102. Push box partition; 103. Side guide rail; 104. Bottom guide rail; 2. Box blank hopper; 3. Box blank picking mechanism; 4. Box body; 5. Upper cover body; 6. Notch; 7. Lower cover body; 8. Rectangular tongue; 9. Folding ear; 10. Triangular tongue; 11. Frame; 12. Support; 13. Top push plate; 1301. Front guide surface; 14. Bottom push plate; 15. Horizontal push head; 16. Cylinder; 17. Rear guide plate; 1701. Guide section; 18. Through slot; 19. Insert plate; 20. Pressure rod. Detailed Implementation

[0014] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0015] Please see Figure 1-5A bottom-fastening device for a box includes a paper box conveying mechanism 1 for conveying an opened box 4, a pre-folding assembly disposed on one side of the paper box conveying mechanism 1, and a bottom-fastening assembly disposed behind the pre-folding assembly along the traveling direction of the box 4. The pre-folding assembly includes a top push plate 13, a horizontal push head 15, and a bottom push plate 14 pushed by a drive member, for sequentially folding the upper half cover 5, the folded ear 9, and the lower half cover 7 at one end of the box 4 to close the opening of the box 4. The bottom-fastening assembly includes an insert plate 19 pushed by a drive member, for pushing the rectangular insert 8 on the lower half cover 7 together with the triangular insert 10 on the folded ear 9 into the box 4 through the notch 6 of the upper half cover 5. In this embodiment, the paper box conveying mechanism 1 can adopt existing cartoning machine technology, that is, it includes components installed side by side on the frame 11 of the cartoning machine. The conveyor chain 101 is equipped with a pusher plate 102 on each conveyor chain 101, and the two conveyor chains 101 are driven by coaxial sprockets to ensure that the pusher plates 102 can move synchronously. The box blank taking mechanism 3 takes the packaging carton from the box blank hopper 2 set in the frame 11 of the cartoning machine and opens it into a three-dimensional state, and then places it between a pair of pusher plates 102 to realize the positioning of the box body 4 of the packaging carton on the conveyor chain 101, so as to facilitate the smooth pre-folding and bottom-fastening actions. The timing of the actions of the top pusher plate 13, the horizontal pusher head 15, the bottom pusher plate 14, and the insert plate 19, as well as the start and stop of the conveyor chain 101, are all controlled by the electronic control system of the cartoning machine. Here, the box opening and the box blank taking mechanism 3 that places the opened box body 4 in the pusher plate 102 can both adopt the existing technology of the cartoning machine.

[0016] For further recommendations, please refer to [link / reference]. Figure 1-5The bottom-fastening device for the box also includes a side guide rail 103 located on the other side of the box conveying mechanism 1 and extending longitudinally along the box conveying mechanism 1. This side guide rail 103 is used to abut the other end of the box body 4 when the pre-folding component is activated, thus preventing the box body 4 from shifting when the pre-folding component is activated and ensuring the reliable completion of the pre-folding action. It also includes a rear guide plate 17 located on the same side as the pre-folding component, behind the pre-folding component and extending longitudinally along the box conveying mechanism 1 in the direction of travel of the box body 4. This rear guide plate 17 is used to keep the pre-folded upper cover 5, folding ear 9, and lower cover 7 of the box body 4 in a pre-folded completed state when it reaches the bottom-fastening component position. Thus, after the pre-folding is completed, as the conveyor chain 101 and the box-pushing partition 102 drive the box body 4 forward, The pre-folded upper cover 5, folded ear 9, and lower cover 7 will not rebound, facilitating the subsequent bottom-fastening action. In this embodiment, the rear guide plate 17 is provided with a through groove 18 for the insertion plate 19 to pass through. The end of the rear guide plate 17 facing the pre-folding assembly has an outwardly extending guide portion 1701. Through the smooth guiding effect of the guide portion 1701, the pre-folded upper cover 5, folded ear 9, and lower cover 7 can smoothly enter the guide wall of the rear guide plate 17, avoiding jamming and damage to the packaging box. The through groove 18 allows the insertion plate 19 to smoothly pass through the rear guide plate 17, thereby pushing the rectangular insertion tongue 8 of the lower cover 7 towards the box body 4, so that the bottom-fastening action can be carried out normally and the bottom-fastening is reliable.

[0017] For further recommendations, please refer to [link / reference]. Figure 1-5 The top push plate 13 is located above the box body 4, and its movement trajectory is vertical. It is used to bend the upper half of the cover plate 5 on the box body 4 towards the inside of the opening edge of the box body 4. There are two horizontal push heads 15, located in the horizontal middle of the direction of travel of the box body 4. The trajectory lines of the two horizontal push heads 15 are in a figure-eight shape from the outside of the box body 4 towards the opening of the box body 4. They are used to fold the folded ears 9 on both sides of the box body 4 inward to cover the outer surface of the bent upper half of the cover plate 5. The bottom push plate 14 is located below the two horizontal push heads 15. It is used to push the lower half of the cover plate 7 of the box body 4 diagonally upward from the lower outside of the box body 4, so that the lower half of the cover plate 7 bends towards the opening of the box body 4 and covers the outside of the bent folded ears 9. See details. Figure 3 The working principle of this embodiment is as follows: after opening the box, the box body 4 is as follows: Figure 3As shown in step A, the upper cover 5, the folded ear 9, and the lower cover 7 are all in a state of being straight with the corresponding side wall of the box body 4. After being conveyed into the pre-folding component position by the conveyor chain 101 and the pusher plate 102, they pause. First, the top pusher plate 13 descends to make the upper cover 5 bend inward toward the opening edge of the box body 4. The degree of bending only needs to be lower than the upper inclined edge of the folded ear 9. Then, the two horizontal pushers 15 move forward to fold the folded ear 9 inward at the same time. At this time, the inner wall of the folded ear 9 will press against the two side edges of the upper cover 5. As the degree of inward folding of the folded ear 9 increases, the degree of inward folding of the upper cover 5 also naturally increases. At this time, the top pusher plate 13 can rise and reset. When the folded ear 9 is folded inward to the set angle, the bottom pusher plate 14 moves forward to make the lower cover 7 fold upward toward the opening of the box body 4. When it is folded to the set angle, the horizontal pusher plate 14 moves forward to make the lower cover 7 fold upward toward the opening of the box body 4. The head 15 retracts and resets. At this time, the inner wall of the lower half cover 7 abuts against the outer wall of the folding lug 9. As the bottom push plate 14 continues to move forward, the folding lug 9 passively follows the lower half cover 7 and continues to fold inward. After reaching the set final angle, the bottom push plate 14 remains stationary. At this time, the conveyor chain 101 and the push box partition 102 drive the current box 4 forward. During the forward movement of the box 4, the surface of the bottom push plate 14 supports the lower half cover 7 to prevent it from springing back until the front edge of the box 4 enters the guide part 1701. When the box 4 enters the guide part 1701, the outer wall of the lower half cover 7 is restricted by the guide part 1701 to prevent it from springing back. At this time, the bottom push plate 14 retracts and resets, opening the passage for the next box to enter (at this time, the next box 4 has not yet entered the pre-folding component starting position). Subsequently, the current box 4 enters the bottom fastening component position (at this time, the state of the box 4 is as follows). Figure 3 (As shown in step D), the next box 4 reaches the pre-folding component, where pre-folding and bottom-fastening actions are performed respectively. This cycle is repeated, and the box 4 after bottom-fastening is as follows. Figure 3 As shown in step E; In this embodiment, in order to prevent the box body 4 from rising when the bottom push plate 14 moves forward, a pressure bar 20 extending along the travel path of the box body 4 can be provided above the travel path of the box body 4. The setting height of the pressure bar 20 is adapted to the thickness of the box body 4. It can be understood that the connection and fixing method between the pressure bar 20 and the frame 11 can adopt the existing technology of the cartoning machine.

[0018] For further recommendations, please refer to [link / reference]. Figure 1-5The insert plate 19 is a horizontally arranged flat plate structure, with a width that matches the notch 6. Both corners at the end furthest from the drive component are rounded. In this embodiment, the connection between the insert plate 19 and the drive component is a flat structure formed by sheet metal bending and connected to the drive component with fasteners to ensure a strong connection. The end of the insert plate 19 furthest from the drive component is the working end, with rounded corners at both ends to effectively prevent damage to the paper surface. The height of the insert plate 19 matches the position of the notch 6 (which is also the position of the rectangular tongue 8). The working principle of the insert plate 19 is as follows: when the drive component pushes the insert plate 19 forward, the rectangular tongue 8 of the lower cover 7 continues to flip inwards towards the box 4. This pressure forces the upper cover 5 and the folded ears... 9 continues to flip inwards towards the box body 4. After reaching a certain angle, the rectangular tongue 8 and the triangular tongue 10 enter the box body 4 through the notch 6. Then, the insert plate 19 retracts. Since the upper edges of the rectangular tongue 8 and the triangular tongue 10 are higher than the bottom of the notch 6, the parts of the rectangular tongue 8 and the triangular tongue 10 that enter the box body 4 will form a stacked and abutting state of the triangular tongue 10, the rectangular tongue 8, and the upper half cover 5, forming a load-bearing structure. It is understandable that during the retraction of the insert plate 19, due to the action of friction, the inwardly flipped upper half cover 5, the folded ear 9, and the lower half cover 7 will have a certain degree of recovery, and form a flat bottom load-bearing state during the subsequent material loading process of the cartoning machine.

[0019] For further recommendations, please refer to [link / reference]. Figure 1-5 The lower end of the push plate 13 has a leading surface 1301 that extends outward from the opening of the box 4 to gradually fold the upper cover 5. In this way, damage to the paper surface of the upper cover 5 can be avoided. It is understood that the length and angle of the leading surface 1301 should not affect the operation of the horizontal push head 15.

[0020] For further recommendations, please refer to [link / reference]. Figure 1-5 The front end of the horizontal pusher 15 is a spherical structure, so that the paper surface of the folding ear 9 can be avoided when folding the folding ear 9.

[0021] For further recommendations, please refer to [link / reference]. Figure 1-5 The driving component is a cylinder 16, and each cylinder is connected to the frame 11 through a corresponding support 12. In this way, even when installing the cylinder 16, it is easy to fine-tune the installation position to achieve the best pre-folding and bottom-fastening effect.

[0022] For further recommendations, please refer to [link / reference]. Figure 1-5 The cylinder 16 used to drive the top push plate 13, bottom push plate 14 and insert plate 19 is a cylinder with a guide rod. This ensures that the top push plate 13, bottom push plate 14 and insert plate 19 are accurately and stably guided when they move, thereby ensuring the quality of pre-folding or bottom buckling.

[0023] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0025] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bottoming device for a bottoming box, characterized by: The box includes a paper box conveying mechanism (1) for conveying the opened box (4), a pre-folding assembly located on one side of the paper box conveying mechanism (1), and a bottom fastening assembly located behind the pre-folding assembly along the traveling direction of the box (4). The pre-folding assembly includes a top push plate (13), a horizontal push head (15), and a bottom push plate (14) pushed by a drive member, for sequentially folding the upper half cover (5), the folding ear (9), and the lower half cover (7) of one end of the box (4) inward to cover the opening of the box (4). The bottom fastening assembly includes an insert plate (19) pushed by a drive member, for pushing the rectangular insert (8) on the lower half cover (7) together with the triangular insert (10) on the folding ear (9) into the box (4) from the notch (6) of the upper half cover (5).

2. The undercasing device according to claim 1, characterized in that: It also includes a side guide rail (103) located on the other side of the paper box conveying mechanism (1) and extending longitudinally along the paper box conveying mechanism (1), used to abut the other end of the box body (4) when the pre-folding component is in motion; it also includes a rear guide plate (17) located on the same side of the pre-folding component and located behind the pre-folding component along the traveling direction of the box body (4) and extending longitudinally along the paper box conveying mechanism (1), used to keep the pre-folded upper half cover body (5), the folding ear (9), and the lower half cover body (7) of the box body (4) in the pre-folded state when it reaches the position of the bottom fastening component, the rear guide plate (17) is provided with a through groove (18) for the insertion plate (19) to pass through, and the rear guide plate (17) has an outwardly extending guide part (1701) at one end facing the pre-folding component.

3. The undercasing device of claim 1, wherein: The top push plate (13) is located above the box body (4), and its movement trajectory is in the up and down direction. It is used to bend the upper half cover plate (5) on the box body (4) towards the inside of the opening edge of the box body (4). There are two horizontal push heads (15), located in the horizontal middle of the box body (4) in the direction of travel. The trajectory lines of the two horizontal push heads (15) are in a figure-eight shape from the outside of the box body (4) towards the opening of the box body (4). It is used to fold the folded ears (9) on both sides of the box body (4) inward to cover the outer surface of the bent upper half cover plate (5). The bottom push plate (14) is located below the two horizontal push heads (15). It is used to push the lower half cover plate (7) of the box body (4) obliquely upward from the outside of the box body (4), so that the lower half cover plate (7) bends towards the opening of the box body (4) and covers the outside of the bent folded ears (9).

4. The undercasing device of claim 1, wherein: The insert plate (19) is a horizontally arranged flat plate structure with a width that matches the notch (6), and both corners at the end away from the drive component are rounded.

5. The undercasing device of claim 1, wherein: The lower end of the push plate (13) has a leading surface (1301) that extends outward toward the opening of the box body (4) to gradually fold the upper cover body (5).

6. The undercasing device of claim 1, wherein: The front end of the horizontal pusher (15) is a spherical structure.

7. The bottoming device according to any one of claims 1 to 6, wherein: The driving component is a cylinder (16), and each cylinder is connected to the frame (11) through a corresponding support (12).

8. The undercasing device according to claim 7, characterized in that: The air cylinders (16) for driving the top push plate (13), the bottom push plate (14) and the insertion plate (19) are guide rod air cylinders.

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