A double head bundling machine

Abstract

The application discloses a double-head bundling machine. The bundling machine mainly comprises a rack, left and right support plates symmetrically arranged on the left and right sides of the rack, and left and right heads correspondingly arranged above the support plates. The front end of the rack is provided with a feeding conveying device for automatically conveying the paper box stack to be bundled to the left and right support plates; a discharging conveying device is arranged between the left and right support plates for automatically moving out the paper box stack after bundling. The core of the application is that through the left and right symmetrically arranged heads, the bundling operation of the two ends of the paper box stack on the support plate can be completed at one time. The redundant process of the traditional single-belt bundling machine, which needs two-time operation, manual turning and repeated positioning, is eliminated, the single-piece bundling time is greatly shortened, and the production rhythm and overall bundling efficiency are improved.

Description

Technical Field

[0001] This application relates to the technical field of strapping machines, and more specifically, to a double-head strapping machine. Background Technology

[0002] In the packaging and transportation of rectangular or long strip cardboard boxes, boards, and profiles, strapping is an essential process. It secures the cardboard boxes, prevents them from scattering, and facilitates handling and stacking. Currently, most mainstream automatic strapping equipment on the market uses a single-belt design. For cardboard boxes requiring strapping at both ends ("both ends"), existing single-belt strapping machines require operators to manually remove the cardboard box from the strapping station or adjust its position on the worktable after the first strapping, aligning the other end with the strapping position. The adjusted cardboard box is then fed back into or positioned at the strapping station, and the machine is started for the second strapping. This entire strapping process requires two machine cycles, adding two manual handling, adjustment, and positioning times. For mass production, these repetitive manual operations and waiting times accumulate, severely slowing down the overall production cycle and packaging efficiency. Utility Model Content

[0003] To address the issue that the current single-strapper strapping machine, used for strapping both ends of cardboard boxes, adds two manual handling, adjustment, and positioning steps, resulting in low overall production cycle time and packaging efficiency, this application provides a double-head strapping machine.

[0004] A double-head strapping machine includes a frame, with a left support plate and a right support plate respectively arranged on the left and right sides of the frame. A left head is arranged corresponding to the left support plate, and a right head is arranged corresponding to the right support plate. The left and right support plates are symmetrically arranged to support the two ends of a carton board. The left and right heads are symmetrically arranged to perform strapping operations on the two ends of the carton board. The front end of the frame is also provided with a feeding conveyor for conveying the carton board onto the two support plates. The frame is also provided with a discharging conveyor between the right and left support plates for discharging the carton board.

[0005] Preferably, the left and right machine heads are beak-shaped machine heads.

[0006] Preferably, the feeding and conveying device includes a roller conveyor line for conveying carton boards onto the left support plate and the right support plate, and a material balancing mechanism disposed on the roller conveyor line for neatly stacking the carton boards.

[0007] Preferably, the roller conveyor line includes a first mounting frame, a second mounting frame, and a third mounting frame, which are arranged side by side. One end of the first mounting frame is aligned with the left support plate, and one end of the second and third mounting frames is aligned with the right support plate. The second mounting frame is located between the first and second mounting frames and has a gap with both the first and second mounting frames. The top of each of the first, second, and third mounting frames is provided with a plurality of rotating rollers evenly arranged along their length direction, and a rotation drive assembly is provided to drive the plurality of rotating rollers to rotate synchronously.

[0008] Preferably, the material handling mechanism includes a front baffle assembly, a rear push assembly, and a side pressing assembly. The number of front baffle assemblies is two and they are symmetrically arranged. One front baffle assembly is located between the first mounting frame and the left support plate, and the other front baffle assembly is located between the third mounting frame and the right support plate. The two front baffle assemblies are used to abut the front side of the carton board. The number of rear push assemblies is two and they are symmetrically arranged. One rear push assembly is located between the first mounting frame and the second mounting frame, and the other rear push assembly is located between the second mounting frame and the first mounting frame. The two rear push assemblies are used to press the rear side of the carton board. The number of side pressing assemblies is two and they are symmetrically arranged. One side pressing assembly is located on the side of the first mounting frame away from the second mounting frame to press the left side of the carton board, and the other side pressing assembly is located on the side of the third mounting frame away from the second mounting frame to press the right side of the carton board.

[0009] Preferably, the front windshield assembly includes a bracket, a baffle, and a first cylinder. The first cylinder is vertically fixed to the bracket and its telescopic shaft is arranged upward. The telescopic shaft of the first cylinder is connected and fixed to the baffle.

[0010] Preferably, the rear push assembly includes a slide, a support, a chain drive, a second cylinder, and a rear push plate. The support is slidably connected to the slide, and the chain drive is connected to the support for driving the support to slide along the length of the slide, causing the support to move closer to or away from the front bumper assembly. The second cylinder is vertically mounted on the support with its telescopic shaft facing upwards, and the rear push plate is fixedly connected to the telescopic shaft of the second cylinder.

[0011] Preferably, the side pressure assembly includes a lead screw module, a third cylinder, and a side pressure plate. The lead screw module is connected to the third cylinder to drive the third cylinder to move closer to or away from the second mounting bracket. The third cylinder is vertically arranged and its telescopic shaft faces the second mounting bracket. The side pressure plate is connected and fixed to the telescopic shaft of the third cylinder.

[0012] Preferably, the material conveying device includes two symmetrically arranged rear conveying mechanisms, each of which includes a belt conveyor and a fourth cylinder connected to the belt conveyor, the fourth cylinder driving the belt conveyor to lift up and down.

[0013] Preferably, the frame is provided with a pressing component at the position above the corresponding left support plate and right support plate. The pressing component includes a fifth cylinder and a pressing plate. The fifth cylinder is arranged vertically and its extension axis is downward. The pressing plate is connected and fixed to the extension axis of the fifth cylinder.

[0014] In summary, this application includes at least one of the following beneficial technical effects:

[0015] 1. With symmetrically arranged left and right heads, the cardboard box stacks can be bundled at both ends simultaneously in one go, eliminating the redundant process of traditional single-belt strapping machines that require two separate operations. This eliminates the need for manual handling, adjustment, and positioning in the middle, reducing the bundling time for a single product and significantly improving production cycle time and overall bundling efficiency. The front-end feeding conveyor automatically delivers the cardboard box stacks to the support plate station. After bundling, the unloading conveyor automatically removes them without the need for operator intervention to turn around, handle, or reposition, reducing labor costs and the risk of operational errors.

[0016] 2. The material straightening mechanism is adopted. Before the carton boards are conveyed into the support plate for bundling, the front baffle component, rear push component, and side pressure component of the material straightening mechanism press against the four sides of the carton boards to make the carton boards neatly stacked. This reduces the situation where the carton boards are scattered and do not meet the product standards during bundling due to the misalignment of each layer during the conveying process caused by vibration or forward inertia.

[0017] 3. The pressing component is used to press down on the cardboard boxes during the strapping process, which reduces the risk of the cardboard boxes being misaligned during strapping, resulting in poor strapping quality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a double-headed strapping machine according to this embodiment from a first angle.

[0019] Figure 2 This is a second-angle schematic diagram of a double-headed strapping machine according to this embodiment.

[0020] Figure 3 This is a schematic diagram of the front windshield assembly in this embodiment.

[0021] Figure 4 This is a schematic diagram of the push-back component in this embodiment.

[0022] Figure 5 This is a schematic diagram of the side pressure assembly in this embodiment.

[0023] Figure 6 This is a schematic diagram of the rear conveying mechanism in this embodiment.

[0024] Figure 7 This is a schematic diagram of the pressure-down component in this embodiment.

[0025] Reference numerals: 1. Frame; 2. Left support plate; 3. Right support plate; 4. Left head; 5. Right head; 6. Clearance passage; 7. Feeding conveyor; 71. Roller conveyor line; 711. First mounting frame; 712. Second mounting frame; 713. Third mounting frame; 714. Rotary roller; 715. Rotation drive assembly; 72. Material handling mechanism; 721. Front baffle assembly; 7211. Bracket; 7212. Baffle; 7213. First cylinder; 722. Rear push assembly; 7221. Slide; 7222. Support base; 7223. Chain drive component; 7224. Second cylinder; 7225. Rear push plate; 723. Side pressure assembly; 7231. Screw module; 7232. Third cylinder; 7233. Side pressure plate; 8. Material feeding conveyor; 81. Rear conveying mechanism; 811. Belt conveyor; 812. Fourth cylinder; 9. Lower pressure assembly; 91. Fifth cylinder; 92. Lower pressure plate; Detailed Implementation

[0026] 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.

[0027] Reference Figure 1 and Figure 2A double-head strapping machine includes a frame 1. A left support plate 2 and a right support plate 3 are respectively arranged on the left and right sides of the frame 1, supporting the two ends of a cardboard box. A left head 4 is positioned corresponding to the left support plate 2, and a right head 5 is positioned corresponding to the right support plate 3. Both the left and right heads are beak-shaped strapping heads. The left and right heads perform strapping actions on the two ends of the cardboard box. The beak-shaped strapping head structure includes a beak knotting mechanism, a rocker arm feeding mechanism, a tensioning mechanism, a tape cutting mechanism, a tape guide, a tape clamping device, a transmission system, and a control system. Its knotting principle is as follows: The operation of the beak-shaped strapping head begins with the rocker arm feeding mechanism, which pushes the strapping tape in the tape guide and wraps around the package. Subsequently, the tape clamping device quickly clamps the tape head and tail to a fixed position. The tensioning mechanism then activates: the friction wheel pulls the tape head back to eliminate slack, while simultaneously pulling the tape tail forward with strong force to bring the strapping tape to a preset tension. At this point, the beak knotting mechanism opens and moves to the overlapping area of ​​the tape layers to close and engage, while the clamping device simultaneously releases the tape tail. The beak immediately performs a 180-degree rotation and twisting action, twisting the tape head and tail into a secure knot. Immediately afterwards, the blade of the tape cutting mechanism moves forward instantly, precisely cutting off the excess tape tail behind the knot. Finally, the beak opens and resets, and all mechanisms return to their positions for further operation. The entire process is powered by the transmission system, and the control system strictly coordinates the timing of tape feeding, clamping, tightening, knotting, cutting, and resetting to ensure efficient and continuous binding operations. The beak head is existing technology and will not be described in detail in this embodiment. Furthermore, a clearance channel 6 is provided between the left support plate 2 and the right support plate 3 of the frame 1 to avoid the operation of the rocker arm tape feeding mechanism. The front end of the frame 1 is also equipped with a feeding conveyor 7 for conveying carton boards onto the two support plates, and a discharging conveyor 8 is also provided between the right support plate 3 and the left support plate 2 of the frame 1 for discharging carton boards. In the above structure, the left and right machine heads 5 are symmetrically arranged, and the two ends of the carton stack can be bundled at the same time. This eliminates the redundant process of traditional single-belt strapping machines that require two separate operations, saves the intermediate manual handling, adjustment and positioning links, reduces the bundling time of a single product, and greatly improves the production cycle and overall bundling efficiency. The front-end feeding conveyor 7 automatically sends the carton stack to the support plate station. After bundling, it is automatically removed by the unloading conveyor 8. There is no need for operators to intervene in turning, handling or repositioning, which reduces labor costs and the risk of operational errors.

[0028] Reference Figure 2Furthermore, the feeding and conveying device 7 includes a roller conveyor line 71 and a material straightening mechanism 72. The roller conveyor line 71 includes a first mounting frame 711, a second mounting frame 712, and a third mounting frame 713. The first mounting frame 711, the second mounting frame 712, and the third mounting frame 713 are arranged side by side. One end of the first mounting frame 711 is aligned with the left support plate 2, and one end of the second mounting frame 712 and the third mounting frame 713 is aligned with the right support plate 3. The second mounting frame 712 is located between the first mounting frame 711 and the second mounting frame 712 and has a gap with both the first mounting frame 711 and the second mounting frame 712. The tops of the first mounting frame 711, the second mounting frame 712, and the third mounting frame 713 are all provided with uniformly arranged... The system includes several rotating rollers 714 and a rotation drive assembly 715 that drives the rollers 714 to rotate synchronously. Carton boards are placed on a first mounting frame 711, a second mounting frame 712, and a third mounting frame 713. The rotation drive assembly 715 drives the rollers 714 to rotate, achieving conveying by the friction between the rollers 714 and the carton boards. The rotation drive assembly 715 is a belt drive structure, including at least two pulleys, a belt fitted on the two pulleys, and a motor that drives the pulleys to rotate. The motor drives the pulleys to rotate, thus driving the belt drive. The bottoms of the rollers 714 are in frictional contact with the belt. When the belt moves, the friction drives the rollers 714 to rotate synchronously.

[0029] Reference Figure 2 Furthermore, the material handling mechanism 72 includes a front baffle assembly 721, a rear push assembly 722, and a side pressing assembly 723. There are two front baffle assemblies 721 arranged symmetrically. One front baffle assembly 721 is located between the first mounting frame 711 and the left support plate 2, and the other front baffle assembly 721 is located between the third mounting frame 713 and the right support plate 3. The two front baffle assemblies 721 are used to abut the front side of the carton board. There are also two rear push assemblies 722 arranged symmetrically. One rear push assembly 722 is located between the first mounting frame 711 and the second mounting frame 712, and the other rear push assembly 722 is located between the second mounting frame 712 and the mounting frame. The two rear push assemblies 722 are used to press against the carton board. On the rear side of the carton board, there are two side-pressing components 723 arranged symmetrically. One side-pressing component 723 is located on the side of the first mounting frame 711 away from the second mounting frame 712 to press against the left side of the carton board. The other side-pressing component 723 is located on the side of the third mounting frame 713 away from the second mounting frame 712 to press against the right side of the carton board. By pressing against the four sides of the carton board with the front baffle component 721, the rear push component 722, and the side-pressing component 723 of the straightening mechanism 72 before the carton board is conveyed into the support plate for bundling, the carton board is stacked neatly. This reduces the situation where the carton board is scattered and does not meet the product standards during bundling due to the misalignment of each layer during the conveying process caused by vibration or forward inertia.

[0030] Reference Figure 2 , Figure 3 and Figure 4 Furthermore, the front baffle assembly 721 includes a bracket 7211, a baffle 7212, and a first cylinder 7213. The first cylinder 7213 is vertically fixed to the bracket 7211 with its telescopic shaft facing upward. The telescopic shaft of the first cylinder 7213 is connected and fixed to the baffle 7212. When the carton board is conveyed to the rear end of the roller conveyor line 71, the cylinder drives the baffle 7212 to rise, so that the front side of the carton board abuts against the baffle 7212. The cylinder drives the baffle 7212 to fall, so that the carton board moves forward. The rear push assembly 722 includes a slide 7221, a support 7222, a chain drive 7223, a second cylinder 7224, and a rear push plate 7225. The support 7222 slides against the slide 7221. The slide 7221 extends along the conveying direction of the roller conveyor line 71. The chain drive 7223 is connected to the support 7222, driving the support 7222 to slide back and forth along the length of the slide 7221. The chain conveyor includes two sprockets at both ends of the slide 7221, a chain sleeved on the two sprockets, and a motor that drives the sprockets to rotate. The support 7222 is fixedly connected to the chain. The chain drive is achieved by the motor driving the sprockets to rotate in both directions, which drives the support 7222 to move back and forth along the length of the slide 7221, causing the support 7222 to move closer to or further away from the front stop assembly 721. The chain drive 7223 is existing technology and will not be described in detail in this embodiment. The second cylinder 7224 is vertically mounted on the support base 7222 with its telescopic shaft facing upwards. The rear push plate 7225 is connected and fixed to the telescopic shaft of the second cylinder 7224. The second cylinder 7224 drives the rear push plate 7225 to rise and extend beyond the top of the roller conveyor line 71. The support base 7222 is driven by the chain drive component 7223 to move towards the front stop assembly 721. The rear push plate 7225 presses against the rear side of the carton board and cooperates with the baffle 7212 to apply pressure to the front and rear sides of the carton board, thus aligning the front and rear sides of the carton board. After the baffle 7212 descends, the rear push plate 7225 moves forward to push the carton board onto the left support plate 2 and the right support plate 3, making the feeding of the carton board more stable.

[0031] Reference Figure 2 and Figure 5The side-pressing assembly includes a lead screw module 7231, a third cylinder 7232, and a side-pressing plate 7233. The lead screw module 7231 is connected to the third cylinder 7232 to drive the third cylinder 7232 to move closer to or away from the second mounting bracket 712. The third cylinder 7232 is vertically arranged with its telescopic shaft facing the second mounting bracket 712. The side-pressing plate 7233 is fixedly connected to the telescopic shaft of the third cylinder 7232. The two side-pressing assemblies are symmetrically arranged, so that the two side-pressing plates 7233 are driven by the two third cylinders 7232 to move towards each other or away from each other. The two side-pressing plates 7233 moving towards each other press against the left and right sides of the carton board respectively to straighten the left and right sides of the carton board. The lead screw module 7231 drives the third cylinder 7232 to move the side-pressing plate 7233 to adjust the spacing of the two side-pressing plates 7233 to match carton board of different sizes, which has high compatibility.

[0032] Reference Figure 1 and Figure 6 Furthermore, the feeding and conveying device 8 includes two symmetrically arranged rear conveying mechanisms 81. Each rear conveying mechanism 81 includes a belt conveyor 811 and a fourth cylinder 812 connected to the belt conveyor 811. The fourth cylinder 812 drives the belt conveyor 811 to rise and fall. After the carton board is bundled, the fourth cylinder 812 drives the belt conveyor 811 to rise. The two belt conveyors 811 simultaneously lift the carton board. The operation of the belt conveyor 811 realizes the feeding and conveying of the carton board.

[0033] Reference Figure 1 and Figure 7 Furthermore, the frame 1 is equipped with a pressing component 9 at the position above the corresponding left support plate 2 and right support plate 3. The pressing component 9 includes a fifth cylinder 91 and a pressing plate 92. The fifth cylinder 91 is vertically arranged and its extension axis is downward. The pressing plate 92 is connected and fixed to the extension axis of the fifth cylinder 91. When the left machine head 4 and the right machine head 5 perform the binding action, the pressing plate 92 is driven to descend by the fifth cylinder 91 to press down the carton board, thereby reducing the situation where the carton board is misaligned during the binding process, resulting in low binding quality.

[0034] 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 double-head strapping machine, characterized in that: The machine includes a frame, with a left support plate and a right support plate respectively on the left and right sides. A left machine head is located at the position corresponding to the left support plate, and a right machine head is located at the position corresponding to the right support plate. The left and right support plates are symmetrically arranged to support the two ends of the cardboard box. The left and right machine heads are symmetrically arranged to perform a binding action on the two ends of the cardboard box. The front end of the frame is also provided with a feeding conveyor for conveying the cardboard box to the two support plates. The frame is also provided with a discharging conveyor between the right support plate and the left support plate for conveying and discharging the cardboard box.

2. The double-head strapping machine according to claim 1, characterized in that: The left and right rotor heads are beak-shaped rotor heads.

3. A double-head strapping machine according to claim 1, characterized in that: The feeding and conveying device includes a roller conveyor line for conveying carton boards onto the left support plate and the right support plate, and a material balancing mechanism disposed on the roller conveyor line for neatly stacking the carton boards.

4. A double-head strapping machine according to claim 3, characterized in that: The roller conveyor line includes a first mounting frame, a second mounting frame, and a third mounting frame, which are arranged side by side. One end of the first mounting frame is aligned with the left support plate, and one end of the second and third mounting frames is aligned with the right support plate. The second mounting frame is located between the first and second mounting frames and has a gap with both the first and second mounting frames. The top of each of the first, second, and third mounting frames is provided with a plurality of rotating rollers evenly arranged along their length, and a rotation drive assembly is provided to drive the plurality of rotating rollers to rotate synchronously.

5. A double-head strapping machine according to claim 4, characterized in that: The material handling mechanism includes a front baffle assembly, a rear push assembly, and a side pressing assembly. There are two front baffle assemblies arranged symmetrically. One front baffle assembly is located between the first mounting frame and the left support plate, and the other front baffle assembly is located between the third mounting frame and the right support plate. Both front baffle assemblies abut against the front side of the carton board. There are also two rear push assemblies arranged symmetrically. One rear push assembly is located between the first mounting frame and the second mounting frame, and the other rear push assembly is located between the second mounting frame and the first mounting frame. Both rear push assemblies press against the rear side of the carton board. There are also two side pressing assemblies arranged symmetrically. One side pressing assembly is located on the side of the first mounting frame away from the second mounting frame to press against the left side of the carton board, and the other side pressing assembly is located on the side of the third mounting frame away from the second mounting frame to press against the right side of the carton board.

6. A double-head strapping machine according to claim 5, characterized in that: The front windshield assembly includes a bracket, a baffle, and a first cylinder. The first cylinder is vertically fixed on the bracket with its telescopic shaft facing upward. The telescopic shaft of the first cylinder is connected and fixed to the baffle.

7. A double-head strapping machine according to claim 5, characterized in that: The rear push assembly includes a slide, a support, a chain drive, a second cylinder, and a rear push plate. The support is slidably connected to the slide. The chain drive is connected to the support for driving the support to slide along the length of the slide, causing the support to move closer to or away from the front bumper assembly. The second cylinder is vertically mounted on the support with its telescopic shaft facing upwards. The rear push plate is fixedly connected to the telescopic shaft of the second cylinder.

8. A double-head strapping machine according to claim 5, characterized in that: The side pressure assembly includes a lead screw module, a third cylinder, and a side pressure plate. The lead screw module is connected to the third cylinder to drive the third cylinder to move closer to or away from the second mounting bracket. The third cylinder is vertically arranged and its telescopic shaft faces the second mounting bracket. The side pressure plate is connected and fixed to the telescopic shaft of the third cylinder.

9. A double-head strapping machine according to claim 1, characterized in that: The material conveying device includes two symmetrically arranged rear conveying mechanisms. Each rear conveying mechanism includes a belt conveyor and a fourth cylinder connected to the belt conveyor. The fourth cylinder drives the belt conveyor to move up and down.

10. A double-head strapping machine according to claim 1, characterized in that: The frame is equipped with a pressing assembly above the corresponding left and right support plates. The pressing assembly includes a fifth cylinder and a pressing plate. The fifth cylinder is vertically arranged and its extension shaft is downward. The pressing plate is connected and fixed to the extension shaft of the fifth cylinder.

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