Belt coordinated film picking device for film wrapping machine

Abstract

This invention discloses a belt-assisted film-picking device for a film-wrapping machine, belonging to the technical field of film-wrapping equipment for packaged products. The film-picking device of this invention includes a frame, a synchronous drive assembly, a film-picking rod, and a film-sweeping belt assembly. The frame is positioned on both sides of the conveyor belt. The synchronous drive assembly includes a synchronous shaft and sprocket assemblies fixedly connected to the frame at both ends of the synchronous shaft. The film-picking rod is fixedly connected to the inside of the sprocket assembly. The film-sweeping belt assembly includes support rods and a flat belt. The support rods are suspended above the conveyor belt, and the flat belt connects the front and rear support rods. In practical use, as the packaged product is conveyed by the conveyor belt, the film-picking rod picks up the cut film. The film-picking rod, in conjunction with the flat belt above the conveyor belt, uses the friction between the flat belt and the film to clamp the film. After clamping and smoothing the film, the film is then placed over the packaged product. This solves the technical problem of film slippage during film picking in existing film-wrapping machines for packaged products.

Description

Technical Field

[0001] This invention relates to the field of film wrapping equipment for packaging products, and more specifically to a belt-driven film-picking device for a film wrapping machine. Background Technology

[0002] A film wrapping machine is used to wrap plastic film around an object and uses a heat-shrink device to shrink the plastic film to form a package around the object to be packaged. The film wrapping machine wraps the plastic film onto the object while it is being conveyed on a conveyor belt. When wrapping the plastic film, a film-lifting device is generally used, which uses a cyclically moving film-lifting rod to lift the film and place it over the object to be packaged.

[0003] In the operation of a film wrapping machine, the film needs to be smoothly and reliably picked up from the film roll and pulled to the packaging station of the items to be packaged. Traditional film picking mechanisms often use a single film picking rod or a simple clamp, which has problems such as unstable film picking, easy film slippage, and inaccurate control of film tension. Especially under high-speed packaging conditions, single-rod film picking is prone to failure due to inertia or film adhesion, which will cause equipment downtime and affect production efficiency. Summary of the Invention

[0004] The technical problem that the invention aims to solve To address the problem of film slippage during film picking in existing film wrapping machines, this invention provides a belt-assisted film picking device for film wrapping machines. The flat belt and the film picking rod work together to clamp and smooth the film before covering it onto the product to be packaged. This achieves stable and reliable film picking and traction, thereby improving wrapping quality, equipment efficiency, and process adaptability.

[0005] Technical solution To achieve the above objectives, the technical solution provided by the present invention is as follows: A belt-coated film-picking device for a film-packing machine includes a frame, a synchronous drive assembly, a film-picking rod, and a film-sweeping belt assembly. The frame is positioned on both sides of a conveyor belt. The synchronous drive assembly includes a synchronous shaft and a sprocket assembly fixedly connected to the frame at both ends of the synchronous shaft. The film-picking rod is fixedly connected to the inside of the sprocket assembly. The film-sweeping belt assembly includes a support rod and a flat belt. The support rod is suspended above the conveyor belt, and the flat belt connects the front and rear support rods. In actual use, as the packaged item is conveyed along the conveyor belt, the film-picking rod picks up the cut film. The film-picking rod and the flat belt above the conveyor belt work together to clamp the film using the friction between the flat belt and the film. After clamping and smoothing the film, the film is placed on the packaged item, achieving stable and reliable film picking, clamping, traction, and covering.

[0006] Further, the belt-coordinated film-picking device for the film wrapping machine includes a sliding adjustment ring for the film sweeping belt assembly; there are two or more flat belts, and the number of flat belts is determined according to the friction requirements between the flat belts, the film and the film-picking rod. The flat belts are slidably connected to the support rods through the sliding adjustment rings to accommodate packages of different widths. After the two ends of the flat belts pass through the sliding adjustment rings, they hang down naturally above the conveyor belt, and the hanging flat belt ends have a smoothing effect on the film.

[0007] Further, for the belt-assisted film-picking device used in the film wrapping machine, when the flat belt passes through the sliding adjustment ring, a redundant ring is reserved on the side of the sliding adjustment ring to accommodate different flat belt end length requirements.

[0008] A further belt-driven film-picking device for a film-wrapping machine includes synchronous lifting assemblies fixedly connected to the frame and arranged on both sides of the conveyor belt. The synchronous lifting assembly includes a screw, a lifting guide plate, a lifting block, and a transverse guide plate. The two lifting guide plates are fixedly connected to the frame on both sides of the conveyor belt. The screw is vertically rotatably connected to the lifting guide plate, and the transverse guide plate is rotatably connected to the screw. A guide head is connected to the outer side of the lifting block, and a chain platform is provided on the inner side. The lifting block slides laterally on the transverse guide plate and obliquely on the lifting guide plate through the guide head. The chain of the sprocket assembly is slidably connected to the chain platform to accommodate the requirements of packages of different heights and specifications.

[0009] Further, the belt-driven film-picking device for the film wrapping machine also includes a guide block in the synchronous drive assembly. The inner end of the guide block is close to the lifting block. The chain table receives the chain transmitted by the guide block and guides the chain to move in a directional cycle, preventing the chain from slipping.

[0010] A further belt-driven film-picking device for a film wrapping machine has two transverse guide rods fixedly connected to the inner side of the lifting guide plate, and a lifting block is slidably connected to the guide rod body to guide the lifting block to slide.

[0011] Furthermore, in the belt-coordinated film-picking device for the film wrapping machine, a support plate is fixedly connected to the inner side of the lifting block, and a hook is provided at the outer end of the support plate; the support rod is suspended above the conveyor belt through the hook, which facilitates the disassembly of the flat belt.

[0012] Further, a belt-driven film-picking device for film wrapping machines has multiple hooks arranged vertically to accommodate different height specifications of the items to be packaged. It can work in conjunction with a synchronous lifting assembly to increase the adjustment range of the height requirements of the items to be packaged.

[0013] Further, a belt-coordinated film-picking device for a film wrapping machine has a gear reversing device fixedly connected to the top of the lifting guide plate. The gear reversing devices on both sides of the conveyor belt are synchronously driven by a transmission shaft. The top of the screw is rotatably connected to the gear reversing device, and the output end of a motor is connected to the gear reversing device to realize the synchronous lifting of the lifting block.

[0014] Further, a belt-driven film-picking device for a film wrapping machine has a guide rail groove fixedly connected to the surface of the frame; the guide rail groove, guide block, and chain table form a chain circulation line; a scale is opened on one side of the lifting guide plate to quantitatively adjust the synchronous lifting of the lifting block.

[0015] Beneficial effects Compared with the prior art, the technical solution provided by this invention has the following advantages: The present invention relates to a belt-assisted film-picking device for a film-wrapping machine. The flat belt works in conjunction with the film-picking rod, replacing the intermittent movement of the rod with continuous operation of the flat belt, eliminating start-stop shocks, resulting in smoother movement and lower noise. Furthermore, the device utilizes the friction between the flat belt and the film for clamping, providing gentle and uniform force to effectively prevent film damage and deformation. Simultaneously, the motor drive enables precise speed synchronization with film feeding, film pushing, and component pushing processes, ensuring stable and reliable wrapping quality. Finally, by adjusting the flat belt spacing, speed, and tension, the device can accommodate films and components of different lengths, widths, and heights, demonstrating good versatility. Attached Figure Description Figure 1 This is an isometric schematic diagram of a belt-driven film-picking device for a film-wrapping machine according to a specific embodiment; Figure 2 This is a front view schematic diagram of a belt-driven film-picking device for a film wrapping machine according to a specific embodiment; Figure 3 for Figure 2 Sectional view along axis AA; Figure 4 This is an isometric view of the film-scanning belt assembly according to a specific embodiment; Figure 5 This is a side view schematic diagram of a belt-driven film-picking device for a film wrapping machine according to a specific embodiment; Figure 6 This is a partial schematic diagram of the synchronous lifting component in a specific embodiment.

[0016] In the diagram: 1-Frame; 2-Synchronous drive assembly; 3-Synchronous lifting assembly; 4-Waste film sweeping belt assembly; 5-Support plate; 6-Waste film lifting rod; 7-Conveyor belt; 20-Guide block; 21-Drive sprocket; 22-Synchronous shaft; 23-Straight roller chain; 24-Guide groove; 25-Guide wheel; 30-Gear commutator; 31-Drive shaft; 32-Screw; 33-Lifting guide plate; 331-Guide inclined hole; 34-Lifting block; 341-Chain table; 35-Transverse guide plate; 351-Guide transverse hole; 36-Guide rod; 37-Guide head; 38-Scale; 41-Support rod; 42-Flat belt; 43-Sliding adjusting ring; 44-Redundant ring; 51-Hook. Detailed Implementation

[0017] To further understand the content of this invention, a detailed description of the invention is provided in conjunction with the accompanying drawings.

[0018] Example 1 The belt-driven film-picking device for the film wrapping machine in this embodiment, such as Figure 1 , 2 As shown in Figures 3 and 4, the system includes a frame 1, a synchronous drive assembly 2, film-picking rods 6, and a film-sweeping belt assembly 4. The frame 1 is positioned on both sides of the conveyor belt 7. The synchronous drive assembly 2 includes a synchronous shaft 22 and two sprocket assemblies fixedly connected to the frame 1 at both ends of the synchronous shaft 22 and arranged symmetrically. The sprocket assembly includes a drive sprocket 21, a guide wheel 25, a chain, and a circulation circuit. The drive sprocket 21 is connected to the output end of an external motor. The chain surrounds the circulation circuit. The film-picking rods 6 are fixedly connected to the inside of the chain and move cyclically with the chain. The number of film-picking rods 6 can be multiple in parallel, and their number can be designed according to the conveying frequency of the packaged items. The film-sweeping belt assembly 4 includes support rods 41 and a flat belt 42. The support rods 41 are suspended above the conveyor belt 7, and the flat belt 42 is connected between the front and rear support rods 41. The middle part of the flat belt 42 between the two support rods 41 hangs down in a natural arc shape due to its own weight.

[0019] In this embodiment, the belt-coated film-picking device for the film-packing machine operates as follows: during the process, the package to be packaged is conveyed and transferred along the conveyor belt 7. After the film-picking rod 6 picks up the sheet film cut in the previous process, the film-picking rod 6 works in conjunction with the flat belt 42 above the conveyor belt 7 to clamp the film using the friction between the flat belt 42 and the film. After clamping and smoothing the film, the film is then placed on the package to be packaged, thus achieving stable and reliable film picking, clamping, traction, and covering.

[0020] Example 2 The belt-driven film-picking device for a film wrapping machine in this embodiment has the same basic structure as in Embodiment 1, with the following differences or improvements: Figure 1 , 2As shown in Figures 3, 5, and 6, the system also includes two sets of synchronous lifting assemblies 3 fixedly connected to the frame 1 and arranged on both sides of the conveyor belt 7. Each synchronous lifting assembly 3 includes a screw 32, a lifting guide plate 33, a lifting block 34, and a transverse guide plate 35. The two lifting guide plates 33 are fixedly connected to the frame 1 on both sides of the conveyor belt 7. The screw 32 is vertically rotatably connected to the lifting guide plate 33, and the transverse guide plate 35 is rotatably connected to the screw 32. The outer side of the lifting block 34 is connected to a guide head 37, and the inner side is provided with a chain platform 341. The lifting block 34 slides laterally on the guide head 37. A transverse guide plate 35 slides obliquely on a lifting guide plate 33. The lifting guide plate 33 is a triangular plate with an oblique guide hole 331 on its hypotenuse. The transverse guide plate 35 has a guide hole 351. Each transverse guide plate 35 is adapted to two symmetrical lifting blocks 34. Two guide heads 37 slide towards or away from each other in the guide hole 351. After passing through the guide hole 351, the guide heads 37 guide the lifting blocks 34 to move obliquely up and down in the guide hole 331 to accommodate different height specifications of the packages. The chain of the sprocket assembly is slidably connected to the chain table 341. A gear reversing device 30 is fixedly connected to the top of the lifting guide plate 33. The gear reversing devices 30 on both sides of the conveyor belt 7 are synchronously driven by a drive shaft 31. The top of the screw 32 is rotatably connected to the gear reversing device 30. One gear reversing device 30 is externally connected to the output end of a motor, and the synchronous lifting of the lifting blocks 34 is achieved through the drive shaft 31.

[0021] Example 3 The belt-driven film-picking device for the film wrapping machine in this embodiment has the same basic structure as in Embodiment 2, with the following differences or improvements: Figure 4 As shown, the film-sweeping belt assembly 4 also includes a sliding adjusting ring 43; there are two or more flat belts 42, the number of which is determined according to the friction requirements between the flat belts 42, the film, and the film-picking rod 6. The flat belts 42 are slidably connected to the support rod 41 via the sliding adjusting ring 43, and the distance between the two flat belts 42 is adjusted by the sliding adjusting ring 43 to accommodate packages of different widths. After passing through the sliding adjusting ring 43, both ends of the flat belts 42 hang naturally above the conveyor belt 7, and the hanging ends of the flat belts 42 have a smoothing effect on the film. When the flat belts 42 pass through the sliding adjusting ring 43, a redundant ring 44 is reserved on the side of the sliding adjusting ring 43 to accommodate different length requirements of the end of the flat belts 42. Example 4 The belt-driven film-picking device for the film wrapping machine in this embodiment has the same basic structure as in embodiment 3, with the following differences or improvements: Figure 1 , 5As shown, the synchronous drive assembly 2 also includes a guide block 20. The inner end of the guide block 20 is close to the lifting block 34. A guide arc-shaped hole is opened inside the guide block 20 to guide the chain transmission. The chain platform 341 receives the chain transmitted by the guide block 20, guides the chain to move in a directional cycle, and prevents the chain from slipping. The chain is a straight roller chain 23. A guide rail groove 24 is fixedly connected to the surface of the frame 1. The guide rail groove 24, the guide block 20, and the chain platform 341 form the chain circulation line. A scale 38 is opened on one side of the lifting guide plate 33 to quantitatively adjust the synchronous lifting of the lifting block 34.

[0022] Example 5 The belt-driven film-picking device for the film wrapping machine in this embodiment has the same basic structure as in embodiment 4, with the following differences or improvements: Figure 6 As shown, two horizontal guide rods 36 are fixedly connected to the inner side of the lifting guide plate 33, and the lifting block 34 is slidably connected to the body of the guide rods 36 to guide the lifting block 34 to slide laterally.

[0023] The inner side of the lifting block 34 is also fixedly connected to the support plate 5, and the outer end of the support plate 5 is provided with a hook 51; the support rod 41 is suspended above the conveyor belt 7 through the hook 51, which facilitates the disassembly of the flat belt 42.

[0024] The hooks 51 are arranged in multiple rows to accommodate different height specifications of the items to be packaged. They can work in conjunction with the synchronous lifting assembly 3 to increase the adjustment range of the height requirements of the items to be packaged.

[0025] In this embodiment, the belt-coordinated film-picking device for a film-wrapping machine operates by starting the motor of the synchronous drive component 2, which drives the drive sprocket 21 to rotate, thereby driving two straight roller chains 23 to rotate continuously in the same direction and at the same linear speed. After the front cutter cuts the film, the edge of the film is fed to the entrance between the two flat belts 42. The running film-picking rod 6 and the curved, drooping flat belt 42 immediately clamp it and pull the film forward smoothly at a linear speed slightly higher than the speed of the packaged item on the conveyor belt 7. After the film is pulled out by the film-picking rod 6, its front end is first pressed against the packaged item, such as the bottom of a bottle. With the coordinated movement of the bottle assembly and the flat belt 42, the film is completely smoothed and wrapped around the bottle. After wrapping, the flat belt 42 separates from the film and enters the next working cycle. The entire film-picking, traction, and wrapping process is completed in one go, continuously and efficiently. Moreover, by adjusting the spacing, speed, and tension of the flat belts 42, it can be used for different specifications of films and bottle types, making it highly versatile.

[0026] Example 6 The belt-driven film-picking device for the film wrapping machine in this embodiment has the same basic structure as in embodiment 5, but the difference or improvement is that: the synchronous shaft 22 is not required, the gear commutator 30 is replaced by a servo motor, and the conveying end of the servo motor directly drives the screw 32; the two servo motors drive the two screws 32 synchronously through a PLC (programmable logic controller), and the two screws 32 drive the lifting block 34 to rise and fall synchronously, which can achieve precise speed synchronization with processes such as film feeding, film pushing, and bottle pushing, and the film wrapping quality is stable and reliable.

[0027] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention. The actual structure and manufacturing steps are not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A belt-driven film-picking device for a film-wrapping machine, characterized in that, include: The frame is arranged on both sides of the conveyor belt; A synchronous drive assembly, comprising a synchronous shaft and sprocket assemblies fixedly connected to frames at both ends of the synchronous shaft; The film-picking rod is fixedly connected to the inside of the sprocket assembly; The film sweeping belt assembly includes support rods and a flat belt; the support rods are suspended above the conveyor belt, and the flat belt is connected between the front and rear support rods.

2. The belt-driven film-picking device for a film-wrapping machine according to claim 1, characterized in that: The sweeping belt assembly also includes a sliding adjustment ring; there are two or more flat belts, which are slidably connected to the support rod through the sliding adjustment ring, and the two ends of the flat belt pass through the sliding adjustment ring and hang down naturally above the conveyor belt.

3. The belt-driven film-picking device for a film-wrapping machine according to claim 2, characterized in that: When the flat belt passes through the sliding adjustment ring, a redundant ring is reserved on the side of the sliding adjustment ring.

4. The belt-driven film-picking device for a film wrapping machine according to any one of claims 1-3, characterized in that: It also includes synchronous lifting assemblies fixedly connected to the frame and arranged on both sides of the conveyor belt; the synchronous lifting assembly includes a screw, a lifting guide plate, a lifting block and a transverse guide plate; the two lifting guide plates are fixedly connected to the frame on both sides of the conveyor belt respectively; the screw is vertically rotatably connected to the lifting guide plate, and the transverse guide plate is rotatably connected to the screw; the outer side of the lifting block is connected to a guide head, and the inner side is provided with a chain platform; the lifting block slides laterally on the transverse guide plate and obliquely on the lifting guide plate through the guide head respectively; the chain of the sprocket assembly is slidably connected to the chain platform.

5. The belt-driven film-picking device for a film wrapping machine according to claim 4, characterized in that: The synchronous drive assembly also includes a guide block, with its inner end close to the lifting block, and the chain platform receiving the chain transmitted by the guide block.

6. The belt-driven film-picking device for a film wrapping machine according to claim 5, characterized in that: A guide rod is fixedly connected to the inner side of the lifting guide plate, and the lifting block is slidably connected to the guide rod.

7. The belt-driven film-picking device for a film wrapping machine according to claim 5, characterized in that: The inner side of the lifting block is also fixedly connected to a support plate, and a hook is provided at the outer end of the support plate; the support rod is suspended above the conveyor belt through the hook.

8. The belt-driven film-picking device for a film wrapping machine according to claim 5, characterized in that: The hooks are multiple, arranged side by side.

9. The belt-driven film-picking device for a film wrapping machine according to claim 5, characterized in that: A gear commutator is fixedly connected to the top of the lifting guide plate, and the gear commutators on both sides of the conveyor belt are synchronously driven by a transmission shaft; the top of the screw is rotatably connected to the gear commutator.

10. The belt-driven film-picking device for a film wrapping machine according to claim 5, characterized in that: The frame surface is fixedly connected with guide rail grooves; the lifting guide plate has a scale on one side.

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