Self-adaptive adjustment mechanical device for tension of heat-sealing film

Abstract

The utility model provides a heat-sealing film tension self-adaptive adjusting mechanical device, and belongs to the technical field of adjusting devices. The device comprises a supporting frame, a driving roller set and a tensioning roller, a first circulation groove is formed in a sliding block, an air pushing column is installed on the first circulation groove, a second circulation groove is formed in the supporting frame, a circulation pipeline is installed on the supporting frame, the two ends of the circulation pipeline are communicated with the first circulation groove and the second circulation groove respectively, and a tensioning block is arranged on the second circulation groove. The tensioning roller is rotationally connected to the tensioning block. By means of the heat-sealing film tension self-adaptive adjusting mechanical device, the tension of a heat-sealing film can be automatically adjusted, the phenomenon that the heat-sealing film is wrinkled or broken is prevented, and the stability and reliability of the heat-sealing film in the conveying process are guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of adjustment device technology, and specifically relates to a mechanical device for adaptive adjustment of heat-sealing film tension. Background Technology

[0002] In the packaging industry, heat-sealing film packaging technology is widely used in many fields such as food, pharmaceuticals, and daily chemicals. Heat-sealing film packaging has many advantages such as good sealing performance, moisture protection, dust protection, and product protection, which can effectively extend the shelf life of products and maintain product quality.

[0003] In the packaging process of heat-sealing film, tension control of the heat-sealing film is a key factor. If the tension of the heat-sealing film is too high, it may be overstretched during transportation and may even break. If the tension of the heat-sealing film is too low, wrinkles may easily appear on the surface of the heat-sealing film, which will not only waste materials, but may also affect the normal packaging process.

[0004] Referring to Chinese patent document CN221163643U, entitled "A Film Tension Adjustment Device for Packaging Machines," the device includes a housing, an adjustment mechanism, and a roller. The adjustment mechanism comprises a threaded rod, a rotating handle, and a movable plate. The housing and adjustment mechanism are arranged in two sets, symmetrically arranged. A threaded rod is vertically installed inside the housing, with a rotating handle at its top. A movable plate is vertically installed inside the housing, extending through the bottom of the housing. The movable plate has threaded grooves that engage with the threaded rod. In use, rotating the rotating handle drives the threaded rod to rotate, causing the movable plate to move vertically up and down under the action of the threaded rod, thereby adjusting the height of the roller and thus regulating the film tension. However, in actual use, the packaging film may experience excessive or insufficient tension at any time, requiring frequent operation of the adjustment mechanism by staff, increasing labor intensity and potentially reducing work efficiency.

[0005] Therefore, a heat-sealing film tension adaptive adjustment mechanism is needed to adjust the tension of the heat-sealing film in a timely manner, prevent wrinkles or cracks in the heat-sealing film, ensure the stability and reliability of the heat-sealing film during transportation, and improve packaging quality and efficiency. Utility Model Content

[0006] The technical problem to be solved by this utility model is: to achieve precise control of the tension of the heat-sealing film, adjust the tension of the heat-sealing film in a timely manner, prevent wrinkles or cracks in the heat-sealing film, and ensure work quality and efficiency.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: it includes a support frame, a drive roller assembly, and a tension roller. The drive roller assembly includes a sliding block that is vertically slidably installed on the support frame. A first flow groove is opened on the sliding block. An air-push column is installed on the first flow groove. A second flow groove is opened on the support frame. A flow pipe is installed on the support frame. The two ends of the flow pipe are respectively connected to the first flow groove and the second flow groove. A tension block is provided on the second flow groove. The tension roller is rotatably connected to the tension block.

[0008] By adopting the above technical solution, the up-and-down displacement of the sliding block can cause the air column to squeeze or expand the gas inside the flow pipe. The change in gas can drive the tensioning block to move, thereby allowing the tensioning roller to move and adjust the tension of the heat-sealing film.

[0009] Optionally, the drive roller assembly also includes a transmission roller mounted on a support frame and a pressing roller mounted on a sliding block, wherein the transmission roller and the pressing roller are configured as two sets and installed symmetrically on the left and right.

[0010] By adopting the above technical solution, the drive roller can transport the heat-sealing film by rotating around its own axis, while the pressing roller can press the heat-sealing film, making the heat-sealing film more stable during the transport process.

[0011] Optionally, a first motor is installed above the support frame, a lead screw is connected to the first motor, a cross frame is installed on the lead screw, a screw drum that meshes with the lead screw is provided on the cross frame, and a connecting rod is installed at the end of each cross frame. The connecting rod passes through the top of the support frame and is fixedly connected to the sliding block. A limiting rod for limiting the cross frame is provided on the support frame.

[0012] By adopting the above technical solution, with the cooperation of the first motor, lead screw and lead drum, the cross frame and connecting rod can move vertically up and down, thereby driving the cross frame to move vertically. The limiting rod can further limit the cross frame, prevent the cross frame from rotating, and ensure the vertical displacement of the cross frame.

[0013] Optionally, a tension tester for determining the tension of the heat-sealing film is installed on the support frame.

[0014] By adopting the above technical solution, the tension detector can monitor the tension of the heat-sealing film in real time and transmit the data to the first motor.

[0015] Optionally, a first auxiliary roller and a second auxiliary roller are installed on the support frame, and the drive roller group is set into two groups.

[0016] By adopting the above technical solution, under the action of the first auxiliary roller and the second auxiliary roller, the heat-sealing film can be wound sequentially on the left drive roller group, the second auxiliary roller, the tension roller, the first auxiliary roller and the right drive roller group, which can ensure the smooth delivery of the heat-sealing film.

[0017] Optionally, a sealed folding sash window is installed on the second flow channel.

[0018] By adopting the above technical solution, the setting of the sealed folding window can maintain the sealing of the flow channel two when the air column squeezes or extracts the gas in the flow channel, avoid gas leakage, and ensure that the air column can stably push the tension block to move.

[0019] Optionally, a second motor is installed on the support frame, and a drive pulley is connected to the output shaft of the second motor. Driven pulleys are installed on the left and right symmetrical transmission rollers, and a transmission belt connects the drive pulley and the two driven pulleys.

[0020] By adopting the above technical solution, the cooperation of the second motor, the driving pulley, the driven pulley and the transmission belt can drive the transmission roller to rotate, thereby realizing the conveying of the heat-sealing film. The structure is simple and the operation is stable.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] Firstly, when the sliding block moves vertically back and forth, the gas can push the tensioning block to make horizontal displacement through the connection between the first and second flow channels, thereby driving the tensioning roller to adjust the tension or relaxation of the heat-sealing film. Under the drive of the tension detector and the first motor, it can automatically adjust in real time according to the tension change of the heat-sealing film to ensure that the heat-sealing film always maintains a suitable tension state during the transportation process.

[0023] Secondly, the first motor drives the cross frame to move vertically, which can move the pressure roller closer to or away from the drive roller. When the heat-sealing film tension is too tight, the pressure roller moves upward, releasing the pressure on the heat-sealing film. Simultaneously, the gas inside the flow channel is compressed, which can push the tension block closer to the first auxiliary roller. Both can simultaneously relax the heat-sealing film that is too tight, preventing the heat-sealing film from breaking due to excessive tension. When the heat-sealing film tension is too loose, the pressure roller moves downward to press the heat-sealing film. Simultaneously, the gas inside the flow channel is released, and the tension block moves away from the first auxiliary roller. Both can simultaneously adjust the tension of the heat-sealing film that is too loose, achieving precise control of the heat-sealing film tension and improving packaging quality and efficiency.

[0024] Thirdly, this utility model has a simple structure and is easy to operate, which can significantly reduce the labor intensity of workers while improving packaging quality and efficiency. Attached Figure Description

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the drive component structure of this utility model;

[0028] Figure 3 This is a front view structural diagram of the present utility model;

[0029] Figure 4 This is a front sectional view of the present invention;

[0030] Figure 5 For the present utility model Figure 4 A magnified schematic diagram of part A in the middle.

[0031] In the diagram: 1. Support frame; 11. Tensioning roller; 12. First auxiliary roller; 13. Second auxiliary roller; 2. Drive roller assembly; 21. Sliding block; 22. Transmission roller; 23. Pressing roller; 24. Second motor; 25. Driving pulley; 26. Driven pulley; 27. Transmission belt; 3. Pneumatic assembly; 31. Flow channel one; 32. Air thrust column; 33. Flow channel two; 34. Flow pipe; 35. Tensioning block; 36. Sealed folding window; 4. Drive assembly; 41. First motor; 42. Lead screw; 43. Cross frame; 44. Spool; 45. Connecting rod; 46. Limiting rod; 47. Tension detector; 5. Controller. Detailed Implementation

[0032] To better understand this utility model, the following embodiments further illustrate its content, but the scope of protection of this utility model is not limited to the embodiments described below. Numerous specific details are set forth in the following description to provide a more thorough understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without one or more of these details.

[0033] like Figure 1-5 As shown, a heat-sealing film tension adaptive adjustment mechanical device includes a support frame 1, a tension roller 11, a drive roller assembly 2, a pneumatic assembly 3, and a drive assembly 4. The support frame 1 consists of two symmetrically arranged concave support plates, an I-shaped top plate, and a support rod connecting the two concave support plates. The tension roller 11 and the drive roller assembly 2 are both installed between the two concave support plates. The drive roller assembly 2 is configured as two sets and installed symmetrically on the left and right sides. The tension roller 11 is used to adjust the tension of the heat-sealing film, and the drive roller assembly 2 is used to convey the heat-sealing film. The pneumatic assembly 3 is configured as two sets and installed symmetrically on the left side of the two concave support plates. The pneumatic assembly 3 can drive the tension roller 11 to make horizontal displacement by compressing or releasing gas. The drive roller assembly 2 includes a sliding block 21 and a transmission roller 22. The drive assembly 4 is used to drive the sliding block 21 and the transmission roller 22 to move vertically reciprocally.

[0034] Reference Figure 3The support frame 1 is also equipped with a first auxiliary roller 12 and a second auxiliary roller 13. The first auxiliary roller 12 and the second auxiliary roller 13 are installed between two concave support plates. The first auxiliary roller 12 is horizontally arranged with the tension roller 11. The second auxiliary roller 13 is located directly above the first auxiliary roller 12 and the tension roller 11. The tension roller 11, the first auxiliary roller 12 and the second auxiliary roller 13 are all located directly below the two sets of drive roller groups 2. The heat-sealing film is sequentially wound around the left drive roller 22, the second auxiliary roller 13, the tension roller 11, the first auxiliary roller 12 and the right drive roller 22.

[0035] Reference Figure 2 The drive roller assembly 2 includes a sliding block 21, a transmission roller 22, and a pressing roller 23. The transmission roller 22 is driven by a second motor 24, a driving pulley 25, a driven pulley 26, and a transmission belt 27 to rotate around its own axis. The transmission roller 22 and the pressing roller 23 are configured as two sets, symmetrically mounted on the concave support plates of the support frame 1. The pressing roller 23 is located directly above the transmission roller 22. The transmission roller 22 is mounted through a rotating shaft base. Vertical grooves are symmetrically opened on both sides of the two concave support plates. The sliding block 21 is slidably disposed in the vertical groove. The two ends of the pressing roller 23 are rotatably connected to the sliding block 21.

[0036] The second motor 24 is mounted on one of the concave support plates of the support frame 1. The driving pulley 25 is connected to the output shaft of the second motor 24. Two driven pulleys 26 are provided, each connected to one end of the transmission roller 22. The driving pulley 25 and the two driven pulleys 26 are on the same vertical horizontal plane. A transmission belt 27 is connected between the driving pulley 25 and the two driven pulleys 26. The two transmission rollers 22 can be rotated simultaneously by the second motor 24, the driving pulley 25, the two driven pulleys 26 and the transmission belt 27.

[0037] Reference Figure 3 , Figure 4 and Figure 5 The pneumatic assembly 3 includes a first flow channel 31, a thrust column 32, a second flow channel 33, a flow pipe 34, a tension block 35, and a sealing folding sash window 36. The pneumatic assembly 3 is configured in two sets, symmetrically mounted on the concave support plate. The first flow channel 31 is vertically opened on the sliding block 21, the thrust column 32 is vertically installed on the first flow channel 31, the second flow channel 33 is opened on the concave support plate of the support frame 1, and the flow pipe 34 is installed on the concave support plate with its two ends connected to the first flow channel 31 and the second flow channel 33, respectively. The flow pipe 34 is sleeved on the first flow channel 31. When the sliding block 21 drives the first flow channel 31 to move up and down, the gas inside the flow pipe 34 is compressed or released.

[0038] Tensioning block 35 is installed on flow channel 2 33. The two ends of tension roller 11 are rotatably connected to the two tensioning blocks 35 respectively. When tensioning block 35 moves left and right, it can drive tension roller 11 to move left and right. A rectangular groove is provided on the concave support plate for moving tension roller 11. A sealing folding window 36 is installed on the rectangular groove. The sealing folding window 36 can prevent gas from leaking from the flow channel 2 33 and the rectangular groove, ensuring that the gas in the flow pipe 34 can stably push the tensioning block 35 to move.

[0039] Reference Figure 1 and Figure 2 The drive assembly 4 includes a first motor 41, a lead screw 42, a cross bracket 43, a screw drum 44, a connecting rod 45, a limit rod 46, a tension detector 47, and a controller 5. An inverted U-shaped support plate is mounted on the I-shaped top plate of the support frame 1. The first motor 41 is mounted on the inverted U-shaped support plate. The lead screw 42 is connected to the output shaft of the first motor 41. A cross bracket 43 is mounted on the lead screw 42. A screw drum 44, which engages with the lead screw 42, is provided on the cross bracket 43. Connecting rods 45 are mounted at each of the four ends of the cross bracket 43. The connecting rods 45 pass through the top of the U-shaped support plate and are fixedly connected to the sliding block 21 in the vertical groove.

[0040] A limiting rod 46 is provided on the support frame 1. The limiting rod 46 is L-shaped, with one of its vertical lines running through the cross frame 43. The limiting rod 46 can further limit the cross frame 43, preventing it from rotating around the lead screw 42 and ensuring vertical displacement of the cross frame 43. A tension detector 47 and a controller 5 are installed on the concave support plate. The tension detector 47 can monitor the tension of the heat-sealing film in real time and transmit the data to the controller 5, thereby controlling the drive of the first motor 41.

[0041] Working principle: First, the heat-sealing film is wound sequentially onto the left drive roller group 2, the second auxiliary roller 13, the tension roller 11, the first auxiliary roller 12, and the right drive roller group 2. Then, the pressing roller is pressed onto the conveying roller to ensure that the heat-sealing film can be more stable when it is conveyed. After the second motor 24 is started, the drive roller 22 is driven to rotate around its own axis through the cooperation of the drive pulley 25, the driven pulley 26, and the transmission belt 27, so as to realize the continuous conveying of the heat-sealing film.

[0042] During the heat-sealing film conveying process, the tension detector 47 monitors the tension status of the heat-sealing film in real time. When the tension of the heat-sealing film is detected to be too large, the tension detector 47 quickly transmits the data to the controller 5. The controller 5 then activates the adjustment mechanism, causing the first motor 41 to drive the lead screw 42 to rotate, which in turn drives the cross frame 43 and the wire drum 44 to move vertically upward on the lead screw 42. The sliding block 21 and the pressure roller 23 also move upward. The pressure roller 23 cancels the pressure on the heat-sealing film, which can reduce the tension of the heat-sealing film.

[0043] As the sliding block 21 moves upward, the air column 32 in the flow channel 31 moves accordingly, compressing the gas in the flow pipe 34. The change in gas pushes the tension block 35 to move horizontally, thereby driving the tension roller 11 to approach the second auxiliary roller 13, which relaxes the heat sealing film and can further reduce the tension of the heat sealing film.

[0044] Conversely, when the heat-sealing film tension is detected to be too low, the tension detector 47 also transmits the data to the controller 5. The controller 5 activates the adjustment mechanism, the first motor 41 works in reverse, and the pressure roller 23 moves downward under the drive of the sliding block 21 to press the heat-sealing film and increase the tension of the heat-sealing film. At this time, the gas in the flow pipe 34 is released, and the tensioning block 35 moves away from the first auxiliary roller 12 under the drive of the gas, thereby further increasing the tension of the heat-sealing film.

[0045] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A mechanical device for self-adaptive adjustment of the tension of a heat-seal film, comprising a support frame (1), a drive roller group (2) and a tensioning roller (11), characterized in that: The drive roller assembly (2) includes a sliding block (21) that is vertically slidably mounted on the support frame (1); The sliding block (21) has a first flow groove (31), and a push column (32) is installed on the first flow groove (31). The support frame (1) has a second flow groove (33), and a flow pipe (34) is installed on the support frame (1). The two ends of the flow pipe (34) are connected to the first flow groove (31) and the second flow groove (33) respectively. A tensioning block (35) is provided on the second flow groove (33), and a tensioning roller (11) is rotatably connected to the tensioning block (35).

2. The heat-sealing film tension adaptive adjustment mechanical device as described in claim 1, characterized in that: The drive roller group (2) also includes a transmission roller (22) mounted on the support frame (1) and a pressing roller (23) mounted on the sliding block (21). The transmission roller (22) and the pressing roller (23) are arranged in two groups and installed symmetrically on the left and right.

3. The heat-sealing film tension adaptive adjustment mechanical device as described in claim 2, characterized in that: A first motor (41) is installed above the support frame (1). A lead screw (42) is connected to the first motor (41). A cross frame (43) is installed on the lead screw (42). A spool (44) that meshes with the lead screw (42) is provided on the cross frame (43). A connecting rod (45) is installed at the end of the cross frame (43). The connecting rod (45) passes through the top of the support frame (1) and is fixedly connected to the sliding block (21). A limiting rod (46) for limiting the cross frame (43) is provided on the support frame (1).

4. The heat-sealing film tension adaptive adjustment mechanical device as described in claim 3, characterized in that: The support frame (1) is equipped with a tension detector (47) for determining the tension of the heat-sealing film.

5. The heat-sealing film tension adaptive adjustment mechanical device as described in claim 4, characterized in that: The support frame (1) is equipped with a first auxiliary roller (12) and a second auxiliary roller (13).

6. The heat-sealing film tension adaptive adjustment mechanical device as described in claim 5, characterized in that: A sealed folding fan window (36) is installed on the second flow channel (33).

7. The heat-sealing film tension adaptive adjustment mechanical device as described in claim 6, characterized in that: The support frame (1) is equipped with a second motor (24), and the output shaft of the second motor (24) is connected to a drive pulley (25). The left and right symmetrical transmission rollers (22) are each equipped with a driven pulley (26), and a transmission belt (27) is connected between the drive pulley (25) and the two driven pulleys (26).

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