An automatic sealing device for packaging boxes

Abstract

This invention provides an automatic sealing device for packaging boxes. Multiple sets of limiting components are evenly distributed on the conveyor belt, with any two sets of limiting components forming a placement station for the corresponding packaging box. A limiting rod is located directly above the conveyor belt, and the distance between the lower surface of the limiting rod and the upper surface of the conveyor belt is adapted to the thickness of the packaging box. Two sealing mechanisms are located on both sides of the conveyor belt to fold the overlapping tongues at both ends of the packaging box. The sealing mechanism includes a disc, a pressing plate, and a folding plate arranged sequentially from front to back. Using a simple structure such as the conveyor belt, limiting rod, and sealing mechanism, automatic sealing of the packaging box is achieved through the cooperation of the disc, pressing plate, and folding plate. The equipment has low cost and stable and reliable operation. The limiting components, limiting rod, and positioning plate ensure that the packaging box maintains accurate position and orientation during the sealing process. The arc-shaped guide of the pressing plate and the rotation of the disc enable precise folding of the overlapping tongue, improving the sealing quality.

Description

Technical Field

[0001] This utility model belongs to the technical field of packaging machinery, specifically relating to an automatic sealing device for packaging boxes. Background Technology

[0002] In the product packaging process, sealing the packaging box is a crucial step, directly affecting the airtightness and freshness of the items inside. Traditional packaging box sealing methods mainly rely on manual operation, which is not only inefficient and labor-intensive, but also results in inconsistent sealing quality, easily leading to problems such as incomplete seals and wrinkles.

[0003] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and to provide an automatic sealing device for packaging boxes.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An automatic sealing device for packaging boxes, comprising:

[0007] A conveyor belt, on which multiple sets of limiting members are evenly distributed, and between any two sets of limiting members, a corresponding packaging box placement station is formed;

[0008] A limiting rod is located directly above the conveyor belt, and the distance between the lower surface of the limiting rod and the upper surface of the conveyor belt is adapted to the thickness of the packaging box.

[0009] The sealing mechanism consists of two sets of sealing mechanisms located on both sides of the conveyor belt to fold the overlapping tongues at both ends of the packaging box. The sealing mechanism includes a disc, a pressing plate, and a folding plate arranged sequentially from front to back.

[0010] Preferably, the discs are horizontally distributed, and a push notch corresponding to the overlapping tongue is provided on the side of the disc. The main shaft of the disc is connected to a drive device so that the overlapping tongue on the side away from the conveyor belt conveying direction is squeezed and folded towards the end of the packaging box by rotating the disc.

[0011] The extrusion plates are distributed in parallel on the side of the conveyor belt. One end of the extrusion plate extends to the disc and the other end extends to the folding plate. The end of the extrusion plate near the disc is provided with an arc-shaped guide to drive the overlapping tongue on the side near the conveyor belt conveying direction to fold towards the end of the packaging box.

[0012] The folding plate includes an upper plate and a lower plate. The upper plate and the lower plate extend horizontally at one end corresponding to the extrusion plate, and the other end extends longitudinally via a knob, so that the upper and lower overlapping tongues fold towards the end of the packaging box, respectively.

[0013] Preferably, the upper plate and the lower plate are provided with a positioning plate extending to the end of the conveyor belt on the side away from the extrusion plate.

[0014] Preferably, the width of the extrusion plate is less than the thickness of the packaging box, and the extrusion plate extends between the upper plate and the lower plate.

[0015] Preferably, the side of the conveyor belt is provided with a push rod located on the side of the sealing mechanism away from the conveyor belt conveying direction, and the side of the conveyor belt is provided with a guide groove corresponding to the push rod.

[0016] Preferably, the limiting rod is hinged to two ends with levers, the upper ends of the levers are connected to the support frame via a drive shaft, and the drive shaft is correspondingly connected to a drive rod.

[0017] Preferably, a sliding sleeve is slidably fitted at the end of the limiting rod away from the conveyor belt's conveying direction, and the end of the sliding sleeve away from the conveyor belt's conveying direction is provided with an arc-shaped guide corresponding to the packaging box.

[0018] Beneficial effects: Using a simple structure including a conveyor belt, limiting rods, and sealing mechanism, the automatic sealing of packaging boxes is achieved through the cooperation of a disc, extrusion plate, and folding plate. The equipment is low-cost and operates stably and reliably. The limiting components, limiting rods, and positioning plates ensure that the packaging box maintains accurate position and orientation during the sealing process. The arc-shaped guide of the extrusion plate and the rotation of the disc enable precise folding of the overlapping tongue, improving sealing quality. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:

[0020] Figure 1 This is a simplified structural diagram of the sealing device in a specific embodiment provided by this utility model;

[0021] Figure 2 This is a schematic diagram showing the distribution of the sealing mechanism in a specific embodiment of this utility model.

[0022] In the diagram: 1. Sliding plate; 2. Fixed plate; 3. Limiting rod; 4. Limiting component; 5. Guide groove; 6. Push rod; 7. Packaging box; 8. Drive shaft; 9. Toggle arm; 10. Support frame; 11. Disc; 12. Extrusion plate; 13. Lower plate; 14. Upper plate; 15. Sliding sleeve; 16. Connecting plate. Detailed Implementation

[0023] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art are within the protection scope of this utility model.

[0024] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected" and "linked" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0026] like Figure 1-2 As shown, an automatic sealing device for packaging boxes includes a conveyor belt, a limiting rod 3, and a sealing mechanism. Multiple sets of limiting members 4 are evenly distributed on the conveyor belt. Each limiting member 4 can be an upwardly extending limiting plate fixed to both sides of the conveyor belt. Any two sets of limiting members 4 form a placement station for the corresponding packaging box 7. After the packaging box 7 is placed at the placement station, it moves along the conveyor belt surface, thereby achieving sealing via the sealing mechanism. To limit the positioning of the packaging box 7 and ensure that it does not shift longitudinally during sealing, this application provides a limiting rod 3 corresponding to the packaging box 7. The limiting rod 3 is located directly above the conveyor belt. The distance between the lower surface of the limiting rod 3 and the upper surface of the conveyor belt is adapted to the thickness of the packaging box 7, and the length of the limiting rod 3 is adapted to the conveyor belt, thus fulfilling the purpose of limiting the positioning of the packaging box 7.

[0027] Two sealing mechanisms are located on both sides of the conveyor belt to fold the overlapping tongues at both ends of the packaging box 7. The sealing mechanism includes a disc 11, a pressing plate 12 and a folding plate arranged from front to back.

[0028] The disc 11 is horizontally distributed and its height is located in the middle of the overlapping tongues on both sides. The disc 11 has a push notch on the side corresponding to the overlapping tongue. The main shaft of the disc 11 is connected to a drive device, which is a motor. The edge of the disc 11 is located on the plane after the overlapping tongue is blocked. By rotating, the push notch moves the overlapping tongue, thereby squeezing the overlapping tongue on the side away from the conveyor belt conveying direction by the rotation of the disc 11 and folding it towards the end of the packaging box 7.

[0029] The side of the push notch corresponding to the rotation direction of the disk 11 is an inclined surface, and the side of the push notch away from the rotation direction of the disk 11 points to the axis of the disk 11. The two sides of the push notch smoothly transition to the outer periphery of the disk 11.

[0030] The extrusion plates 12 are distributed parallel to the side of the conveyor belt. The height of the extrusion plates 12 is adapted to the disc 11. One end of the extrusion plates 12 extends to the disc 11, and the other end extends to the folding plate. The end of the extrusion plates 12 near the disc 11 is provided with an arc-shaped guide. As the packaging box 7 passes through the extrusion plates 12, under the guidance of the arc-shaped guide, the overlapping tongue on the side near the conveyor belt conveying direction is driven to fold towards the end of the packaging box 7.

[0031] The folding plate includes an upper plate 14 and a lower plate 13, which respectively fold the upper and lower overlapping tongues toward the end of the packaging box 7. Specifically, the upper plate 14 and the lower plate 13 extend horizontally at one end of the extrusion plate 12, and the other end extends longitudinally through a knob. Under the guidance of the upper plate 14 and the lower plate 13, the upper and lower overlapping tongues can be folded. The height of the upper plate 14 and the lower plate 13 is adapted to the height of the upper and lower overlapping tongues after folding. The side of the upper plate 14 and the lower plate 13 away from the extrusion plate 12 is provided with a positioning plate extending to the end of the conveyor belt. The positioning plate ensures that the packaging box 7 will not unfold during the backward transport.

[0032] The width of the extrusion plate 12 is less than the thickness of the packaging box 7. The extrusion plate 12 extends between the upper plate 14 and the lower plate 13, thereby preventing the overlapping tongues on both sides from unfolding before being limited by the overlapping of the upper and lower overlapping tongues.

[0033] The lower plate 13 has an upwardly extending connecting plate 16 on its positioning plate. The connecting plate 16 has a longitudinally extending strip hole. The locking bolt extends through the strip hole and is threaded to the upper plate 14, thereby adjusting the height of the upper plate 14. To ensure stability, at least two connecting plates 16 are provided.

[0034] In an optional embodiment, the side of the conveyor belt is provided with a push rod 6 located on the side of the sealing mechanism away from the conveyor belt conveying direction. The push rod 6 is a cylinder. The side of the conveyor belt is provided with a guide groove 5 corresponding to the push rod 6. The guide groove 5 is directly opposite the packaging box 7. The product to be packaged can be placed in the guide groove 5. Under the push of the push rod 6, the product is pushed into the packaging box 7 and then sealed to achieve automated packaging.

[0035] The limit rod 3 is hinged to two ends with lever arms 9. The upper end of the lever arm 9 is fixed with a drive shaft 8. The drive shaft 8 extends horizontally along the transverse direction of the conveyor belt. A support frame 10 corresponding to the drive shaft 8 is provided on the side of the conveyor belt. The drive shaft 8 is rotatably connected to the support frame 10. One of the drive shafts 8 is fixedly connected to a linkage rod extending radially along it. The linkage rod is connected to the drive rod as a power source. The drive rod can be a cylinder that is hinged to the linkage rod. The height of the limit rod 3 can be adjusted by rotating the drive shaft 8.

[0036] In an optional embodiment, a sliding sleeve 15 is slidably fitted to one end of the limiting rod 3 away from the conveyor belt conveying direction. The sliding sleeve 15 is an inverted U-shaped structure of the limiting rod 3, and its lower edge is at the same height as the lower surface of the limiting rod 3. Thus, after the height of the limiting rod 3 is adjusted, the sliding sleeve 15 extends to the unloading station of the conveyor belt to ensure that the packaging box 7 is guided. The end of the sliding sleeve 15 away from the conveyor belt conveying direction is provided with an arc-shaped guide corresponding to the packaging box 7 to ensure that the packaging box 7 placed in the unloading station is guided under the limiting rod 3.

[0037] The middle part of the sliding sleeve 15 is provided with a sliding hole extending along its length direction. The corresponding locking bolt passes through the sliding hole and is then threaded onto the limiting rod 3 to achieve fixation.

[0038] In one optional embodiment, the conveyor belt includes two drive chains spaced apart. The two drive chains are synchronously driven by corresponding servo motors. A limiting plate is fixed on the drive chains. The two drive chains are respectively mounted on a fixed plate 2 and a sliding plate 1. The bottom of the sliding plate 1 is provided with a slide rail pointing to the fixed plate 2. The middle of the sliding plate 1 is provided with a threaded screw. One end of the screw passes through the sliding plate 1 and is rotatably connected to the fixed plate 2. By rotating the screw, the distance between the fixed plate 2 and the sliding plate 1 can be adjusted to accommodate packaging boxes 7 of different lengths.

[0039] The fixed plate 2 and the sliding plate 1 are respectively assembled on the main truss of the sealing device. The upper outer edges of the fixed plate 2 and the sliding plate 1 are respectively provided with mounting seats for assembling the corresponding sealing mechanism, so that the sealing mechanism and the corresponding fixed plate 2 and sliding plate 1 maintain a relative position.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be within the scope of protection of the pending claims of the present utility model.

Claims

1. An automatic sealing device for packaging boxes, characterized in that, include: A conveyor belt, on which multiple sets of limiting members are evenly distributed, and between any two sets of limiting members, a corresponding packaging box placement station is formed; A limiting rod is located directly above the conveyor belt, and the distance between the lower surface of the limiting rod and the upper surface of the conveyor belt is adapted to the thickness of the packaging box. The sealing mechanism consists of two sets of sealing mechanisms located on both sides of the conveyor belt to fold the overlapping tongues at both ends of the packaging box. The sealing mechanism includes a disc, a pressing plate, and a folding plate arranged sequentially from front to back.

2. The automatic sealing device for packaging boxes according to claim 1, characterized in that, The discs are horizontally distributed, and there is a push notch on the side of the disc corresponding to the overlapping tongue. The main shaft of the disc is connected to a drive device so that the overlapping tongue on the side away from the conveyor belt is folded towards the end of the packaging box by rotating the disc. The extrusion plates are distributed in parallel on the side of the conveyor belt. One end of the extrusion plate extends to the disc and the other end extends to the folding plate. The end of the extrusion plate near the disc is provided with an arc-shaped guide to drive the overlapping tongue on the side near the conveyor belt conveying direction to fold towards the end of the packaging box. The folding plate includes an upper plate and a lower plate. The upper plate and the lower plate extend horizontally at one end corresponding to the extrusion plate, and the other end extends longitudinally via a knob, so that the upper and lower overlapping tongues fold towards the end of the packaging box, respectively.

3. The automatic sealing device for packaging boxes according to claim 2, characterized in that, The upper and lower plates are provided with positioning plates extending to the end of the conveyor belt on the side away from the extrusion plate.

4. The automatic sealing device for packaging boxes according to claim 2, characterized in that, The width of the extrusion plate is less than the thickness of the packaging box, and the extrusion plate extends between the upper plate and the lower plate.

5. The automatic sealing device for packaging boxes according to claim 1, characterized in that, The side of the conveyor belt is provided with a push rod located on the side of the sealing mechanism away from the conveyor belt's conveying direction, and the side of the conveyor belt is provided with a guide groove corresponding to the push rod.

6. The automatic sealing device for packaging boxes according to claim 1, characterized in that, The limiting rod has a lever hinged at both ends. The upper end of the lever is connected to the support frame via a drive shaft, and a drive rod is correspondingly connected to the drive shaft.

7. The automatic sealing device for packaging boxes according to claim 6, characterized in that, The end of the limiting rod away from the conveyor belt's conveying direction is slidably fitted with a sliding sleeve, and the end of the sliding sleeve away from the conveyor belt's conveying direction is provided with an arc-shaped guide corresponding to the packaging box.

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