Full-automatic joint following alternate membrane replacing structure

Abstract

The application discloses a full-automatic joint following alternating film replacing structure, which comprises a placing table and an auxiliary slope, an adjusting groove is symmetrically arranged on one side of the top of the placing table, and a second lead screw is arranged in the adjusting groove. In the application, a feeding frame and a blanking seat are adopted. When the device is used, the feeding frame and the raw material box can cooperate to release and move the stretching film cylinder, so that the new stretching film cylinder can be placed on the work frame. Meanwhile, the blanking seat can timely take out the used stretching film cylinder and place it outside, which facilitates the replacement and installation of the subsequent stretching film cylinder and the timely processing of personnel, is convenient for better operation, and can effectively reduce the labor intensity of personnel, and make personnel away from the work area, so that the occurrence of danger can be avoided, the use safety of the device is improved, and the device is convenient to use, has the advantages of labor saving and high safety.

Description

Technical Field

[0001] This invention relates to the field of packaging equipment technology, and in particular to a fully automatic sequential coupling film replacement structure. Background Technology

[0002] Stretch film wrapping machines, also known simply as wrapping machines, are distinguished from other wrapping machines by the fact that they use stretch film (also called wrapping film) as a consumable material. They are also called pallet packing machines, pallet wrapping machines, and other names. This type of packaging machine emerged as demands for logistics efficiency increased, aiming to reduce labor, save packaging costs, and achieve streamlined loading and unloading. It has gradually become an essential packaging machine for large enterprises, especially export-oriented companies. Furthermore, it has gradually become a common packaging method in certain specialized industries, such as for tire cord fabric and tin cans.

[0003] A publicly available patent application (CN201620574090.X) discloses a stretch film wrapping machine, comprising a frame, a turntable, and a control panel. The turntable is located on the left side of the frame, at the same horizontal level as the bottom of the frame and fixedly connected. A first motor is installed at the bottom of the left side of the frame and connected to the turntable. A slide groove is provided in the middle of the side of the frame facing the turntable, and a movable rectangular box is placed in the slide groove. A second motor is fixed on the upper surface of the frame directly above the slide groove, and the second motor drives the rectangular box to move up and down along the slide groove. A rotating shaft is provided inside the rectangular box, and the stretch film is wrapped on the rotating shaft. The first motor and the second motor are respectively connected to the control panel. By setting a rotatable turntable at the bottom and a frame with corresponding slide grooves and rectangular boxes on the right side of the turntable, automatic wrapping of stretch film on objects can be achieved, saving manpower, especially when the object is tall, thus reducing the inconvenience of manual wrapping and improving production efficiency.

[0004] Currently used stretch film wrapping machines all require manual film replacement. The operator must enter the rotating area of ​​the working arm to replace the film. During the film replacement process, the equipment must be powered off, which affects the working efficiency of the equipment and the safety of the personnel, posing certain safety hazards. In addition, the operator needs to constantly monitor the remaining amount of stretch film, which can easily lead to untimely film replacement, further reducing the working efficiency of the equipment. Overall, the usage effect is not ideal. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a fully automatic shunting joint membrane replacement structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a fully automatic sequential joint replacement membrane structure, comprising a placement platform and an auxiliary slope. The placement platform has symmetrically arranged adjustment grooves on one side of its top. A second lead screw is installed inside the adjustment groove, with one end of the second lead screw passing through one side of the adjustment groove and connected to a second motor. Two sets of adjustment grooves, second motors, and second lead screws are provided, each independently configured. A feeding frame and a discharging seat are respectively sleeved around the outer periphery of the second lead screw, and both the feeding frame and the discharging seat are slidably connected to the adjustment groove. A fourth motor is installed inside the discharging seat, with the output end of the fourth motor passing through one side of the discharging seat and connected to the discharging plate. The feeding rack and the unloading plate are symmetrically provided with several sets of mounting slots. A movable block is symmetrically slidably connected inside each mounting slot. A hydraulic rod is mounted on one end of each movable block, located inside the mounting slot. A clamping arm is welded to one end of each movable block, and the surface of the clamping arm has an arc-shaped groove. A bearing plate is slidably connected to one side of the bottom of the feeding rack. A spring is connected to one end of the bearing plate, located inside the bottom of the feeding rack. Support plates are welded to the bottom of the unloading plate and the top of the unloading seat. Several sets of support rods rotate around the support plates, and the support rods are welded to the bottom of the unloading plate.

[0007] As a further description of the above technical solution:

[0008] A working groove is formed in the middle of one side surface of the placement platform. A third lead screw is installed inside the working groove. One end of the third lead screw passes through one side of the working groove and is connected to a third motor. A movable seat is sleeved on the outer periphery of the third lead screw. A working frame is welded to one end of the movable seat. Several sets of fourth cylinders are symmetrically installed on the inner sides of both ends of the working frame. A limit plate is installed at one end of the fourth cylinder. A docking post is installed in the middle of the surface of the limit plate. The docking post is connected to the surface of the working frame. A contact plate is installed around the bottom of the docking post at the inner surface of the working frame. A weighing sensor is installed at the contact point between the bottom of the contact plate and the surface of the working frame.

[0009] As a further description of the above technical solution:

[0010] The working frame has several sets of drive slots staggered on its inner surface. A first lead screw is installed inside each drive slot. One end of the first lead screw passes through one side of the working frame and is connected to a first motor. A moving head is sleeved around the outer periphery of the first lead screw. An auxiliary roller is rotatably connected to the top of the moving head.

[0011] As a further description of the above technical solution:

[0012] The work frame has symmetrical moving slots on both sides of one end surface. A second cylinder is located inside the moving slot. One end of the second cylinder is connected to an outer extension arm, which is slidably connected to the moving slot. A first cylinder is installed inside one side surface of the outer extension arm. One end of the first cylinder is connected to a connecting plate, which is slidably connected to the outer extension arm. An adsorption strip is fixedly installed between the connecting plates. Several sets of suction cups are evenly installed on the surface of the adsorption strip.

[0013] As a further description of the above technical solution:

[0014] An air pump is installed on one side of the top of the work frame, and the air pump is connected to the suction cup through a pipe and a solenoid valve.

[0015] As a further description of the above technical solution:

[0016] An electric turntable is installed at the top center of the placement platform.

[0017] As a further description of the above technical solution:

[0018] An auxiliary ramp is installed on one side of the top of the placement platform, located on the outer periphery of the electric turntable.

[0019] As a further description of the above technical solution:

[0020] A raw material box is fixedly installed directly above the feeding rack on the surface of the placement table. The raw material box has a placement hole inside, and a partition plate is slidably connected inside the placement hole. One end of the partition plate passes through one side of the raw material box and is connected to the third cylinder.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. This invention employs a feeding rack and a discharge seat. During operation, the feeding rack and material box work together to release and move the stretch film cylinder, allowing new stretch film cylinders to be placed on the work frame. Simultaneously, the discharge seat can promptly remove used stretch film cylinders and place them outwards, facilitating subsequent replacement and installation, as well as timely handling by personnel. This improves operation. Since the replacement of the stretch film cylinder does not require manual operation, it effectively reduces labor intensity and keeps personnel away from the work area, preventing accidents and improving the safety of the device. It offers advantages such as labor-saving operation and high safety.

[0023] 2. In this invention, a weighing sensor is used. When the device is in use, the weight on the contact plate can be detected by the weighing sensor on the work frame. Since the weighing plate is in direct contact with the stretch film cylinder, the detected weight is the weight of the stretch film cylinder. The remaining amount of stretch film can be determined by the change in weight, which facilitates timely replacement of the stretch film cylinder. This eliminates the need for long-term visual observation by personnel, ensures timely processing of the stretch film, maintains continuous operation, avoids long-term downtime and equipment idling affecting the processing effect, and has the advantage of timely film replacement. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the embodiments will be briefly described below.

[0025] Figure 1 This is a schematic diagram of a fully automatic liner replacement membrane structure proposed in this invention;

[0026] Figure 2 This is an enlarged bottom view of the work frame for a fully automatic sequential joint membrane replacement structure proposed in this invention;

[0027] Figure 3 This is an enlarged view of the connection position of the working frame and the outer extension arm of the fully automatic sequential joint alternating membrane structure proposed in this invention;

[0028] Figure 4 This is a schematic diagram showing the connection between the feeding plate and the feeding seat of a fully automatic sequential joint alternating membrane structure proposed in this invention;

[0029] Figure 5 This is a partial schematic diagram of the surface of a feeding rack with a fully automatic sequential joint alternating membrane structure proposed in this invention;

[0030] Figure 6 This is a schematic diagram of the contact plate of a fully automatic unibody coupling with an alternating membrane structure proposed in this invention;

[0031] Figure 7 This is a schematic diagram of the limiting disk and docking column of a fully automatic sequential joint membrane replacement structure proposed in this invention;

[0032] Figure 8 This is a schematic diagram showing the connection between the feeding rack and the support plate of a fully automatic sequential joint membrane replacement structure proposed in this invention.

[0033] Legend:

[0034] 1. Placement table; 2. Electric turntable; 3. First cylinder; 4. Moving slot; 5. Second cylinder; 6. Drive slot; 7. First lead screw; 8. First motor; 9. Weighing sensor; 10. Contact plate; 11. Adjustment slot; 12. Second lead screw; 13. Bearing plate; 14. Spring; 15. Feeding rack; 16. Second motor; 17. Mounting slot; 18. Moving block; 19. Hydraulic rod; 20. Clamping arm; 21. Moving head; 22. Moving base; 23. Raw material box 24. Auxiliary roller; 25. Separator plate; 26. Working frame; 27. Third cylinder; 28. Placement hole; 29. ​​Working groove; 30. Third lead screw; 31. Third motor; 32. Limiting plate; 33. Connecting column; 34. Air pump; 35. Fourth cylinder; 36. Outer extension arm; 37. Connecting plate; 38. Adsorption strip; 39. Suction cup; 40. Feeding plate; 41. Support rod; 42. Support plate; 43. Fourth motor; 44. Feeding seat; 45. Auxiliary slope. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0036] Example 1, refer to Figure 1-8 A fully automatic sequential coupling and replacement membrane structure includes a placement platform 1 and an auxiliary slope 45. A symmetrical adjustment groove 11 is provided on one side of the top of the placement platform 1. A second lead screw 12 is installed inside the adjustment groove 11. One end of the second lead screw 12 passes through one side of the adjustment groove 11 and is connected to a second motor 16. Two sets of adjustment grooves 11, second motors 16, and second lead screws 12 are provided, and each is independently configured. A feeding frame 15 and a discharging seat 44 are respectively sleeved on the outer periphery of the second lead screw 12. Both the feeding frame 15 and the discharging seat 44 are slidably connected to the adjustment groove 11. A fourth motor 43 is installed inside the discharging seat 44. The output end of the fourth motor 43 passes through one side of the discharging seat 44 and is connected to a discharging plate 40. The surfaces of the feeding frame 15 and the discharging plate 40 are... Several sets of mounting slots 17 are symmetrically provided. Moving blocks 18 are symmetrically slidably connected inside the mounting slots 17. A hydraulic rod 19 is installed at one end of the moving block 18 and is located inside the mounting slot 17. A clamping arm 20 is welded to one end of the moving block 18. The surface of the clamping arm 20 is provided with an arc groove. A bearing plate 13 is slidably connected to one side of the bottom of the feeding rack 15. A spring 14 is connected to one end of the bearing plate 13 at the bottom of the feeding rack 15. Support plates 42 are welded to the bottom of the unloading plate 40 and the top of the unloading seat 44. Several sets of support rods 41 are rotated around the support plates 42. The support rods 41 are welded to the bottom of the unloading plate 40. The clamping arm 20 is set to clamp the stretch film cylinder for easy replacement operation.

[0037] Example 2, refer to Figure 1 and Figure 2 A working groove 29 is provided in the middle of one side surface of the placement platform 1. A third lead screw 30 is installed inside the working groove 29. One end of the third lead screw 30 passes through one side of the working groove 29 and is connected to a third motor 31. A movable seat 22 is sleeved on the outer periphery of the third lead screw 30. A working frame 26 is welded to one end of the movable seat 22. Several sets of fourth cylinders 35 are symmetrically installed on the inner sides of both ends of the working frame 26. A limit plate 32 is installed at one end of the fourth cylinder 35. A docking post 33 is installed in the middle of the surface of the limit plate 32. The docking post 33 penetrates the surface of the working frame 26. The contact plate 10 is installed around the bottom of the inner surface of the working frame 26 on the outer periphery of the docking column 33. A weighing sensor 9 is installed at the contact position between the bottom of the contact plate 10 and the surface of the working frame 26. The weighing sensor 9 is set to detect the weight on the contact plate 10 and determine the amount of stretch film remaining on the stretch film cylinder based on the change in weight, so as to facilitate timely replacement of the stretch film cylinder. Since the weighing sensor 9 and its corresponding application technology are mature, personnel can make corresponding adjustments and selections, which will not be elaborated on here.

[0038] Example 3, referring to Figure 1 The working frame 26 has several sets of drive grooves 6 staggered on its inner surface. A first lead screw 7 is installed inside the drive groove 6. One end of the first lead screw 7 passes through one side of the working frame 26 and is connected to the first motor 8. A moving head 21 is sleeved on the outer periphery of the first lead screw 7. An auxiliary roller 24 is rotatably connected to the top of the moving head 21. The auxiliary roller 24 is set to assist in guiding the stretching film, ensuring the stability of the stretching film's movement and the flatness of the stretching.

[0039] Example 4, refer to Figure 1 , Figure 3 and Figure 5 The working frame 26 has symmetrically arranged moving grooves 4 on both sides of one end surface. A second cylinder 5 is located inside the moving groove 4. One end of the second cylinder 5 is connected to an outer extension arm 36, which is slidably connected to the moving groove 4. A first cylinder 3 is installed inside one side surface of the outer extension arm 36, and one end of the first cylinder 3 is connected to a connecting plate 37, which is slidably connected to the outer extension arm 36. An adsorption strip 38 is fixedly installed between the connecting plates 37. Several sets of suction cups 39 are evenly installed on the surface of the adsorption strip 38. The movement of the outer extension arm 36 and the adsorption strip 38 is to ensure that the use of the stretch film cylinder is not affected when it is in use. After the stretch film cylinder is replaced, the stretch film can be adsorbed and pulled outward, which is convenient for personnel to use and avoids the danger of personnel directly putting their arms into the working frame 26, thus ensuring the safety of the structure.

[0040] Example 5, refer to Figure 1An air pump 34 is installed on one side of the top of the work frame 26. The air pump 34 is connected to the suction cup 39 through pipes and a solenoid valve. The purpose of the air pump 34 is to extract the gas between the suction cup 39 and the stretch film, thereby creating a negative pressure, which enables the suction cup 39 to adsorb the stretch film, facilitating subsequent stretching of the stretch film and making it easier for personnel to use. Since the negative pressure adsorption technology of the suction cup 39 is a mature technology and its supporting equipment is also mature equipment, personnel can flexibly choose appropriate equipment for use. The air pump 34 and solenoid valve involved in this application can also be replaced. This is for reference only and will not be elaborated further here.

[0041] Example 6, refer to Figure 1 An electric turntable 2 is installed at the top center of the placement platform 1. The electric turntable 2 is set up to rotate the packaging box placed on its surface, so that the stretch film can be fully wrapped around the packaging box to achieve full packaging operation.

[0042] Example 7, refer to Figure 1 An auxiliary ramp 45 is installed on one side of the top of the placement platform 1, located on the outer periphery of the electric turntable 2. The auxiliary ramp 45 is designed to facilitate the movement of packaging boxes containing disposable items that need to be packaged by personnel, making subsequent film-wrapping operations easier.

[0043] Example 8, refer to Figure 1 A raw material box 23 is fixedly installed on the surface of the placement table 1 directly above the feeding rack 15. The raw material box 23 has a placement hole 28 inside, and a partition plate 25 is slidably connected inside the placement hole 28. One end of the partition plate 25 passes through one side of the raw material box 23 and is connected to the third cylinder 27. The raw material box is set up to facilitate the storage of stretch film cylinders used for subsequent replacements, making them convenient for subsequent use. Subsequently, by opening the partition plates 25 one by one, the stretch film cylinders can be released one by one, thereby realizing continuous film replacement operations. At the same time, in order to avoid large changes in the height of the stretch film cylinder at one time, the partition plate 25 where the lower stretch film is located can be returned to its original position after the lower stretch film is released, and then the upper partition plate 25 can be opened. This way, the upper stretch film cylinder can be released to its original position, thereby realizing the release operation of the drop difference, ensuring the stability and integrity of the stretch film cylinder release. At the same time, the change of drop difference can facilitate the clamping arm 20 on the feeding rack 15 to accurately clamp and fix the stretch film cylinder, facilitating subsequent replacement operations.

[0044] Working principle: In actual use, the auxiliary slope 45 allows personnel to easily place the items to be packaged onto the electric turntable 2. Then, by pulling one side of the stretch film, it is attached to the items to be packaged. The rotation of the electric turntable 2 continuously stretches the stretch film, causing it to wrap around the surface of the items. Simultaneously, as the electric turntable 2 rotates, the operation of the third motor 31 drives the third lead screw 30 to rotate, causing the unknown movable seat 22 on its surface to move the entire work frame 26 upwards. This allows the stretch film to be fully coated and packaged. Furthermore, a weighing sensor 9 is located at the bottom of the contact plate 10 where the stretch film cylinder is located. The remaining amount of stretch film can be determined by the weight change detected by the weighing sensor 9. After the stretch film is used up, the operation of the third motor 31 can move the entire work frame 26 to the top position of the placement table 1. Then, the first motor 8 at the bottom of the work frame 26 can rotate, thereby driving the first lead screw 7 to rotate. The operation of the first lead screw 7 can drive the moving head 21 connected to it to move outward, thereby causing the auxiliary rollers 24 to move away from each other. At this time, the operation of the second motor 16 can drive the second lead screw 12 to rotate. The second lead screw 12 can drive the feeding frame 15 or the unloading seat 44 at its surface position to move. Since the second motor 16 and the second lead screw 12 are each set independently, When the feeding rack 15 and the unloading seat 44 are moved, there is no interference between the two sets, thus ensuring that the device can operate smoothly and normally. Then, when the unloading seat 44 moves to the inner position, the hydraulic rod 19 can push out and then return to its original position to move the clamping arm 20 to the outer periphery of the stretching film cylinder and clamp it. At the same time, the fourth cylinders 35 at both ends of the working frame 26 can push outward synchronously. At this time, the limiting plate 32 can drive the docking column 33 away from the stretching film cylinder. At this time, the second motor 16 at the position of the unloading seat 44 can reverse to move the clamped stretching film cylinder outward. When it moves to the outermost position, the operation of the fourth motor 43 inside the unloading seat 44 can drive the unloading plate 40 to move outward. The feed plate 40 rotates, and during rotation, it is supported and limited by the bottom support rod 41 and support plate 42 to ensure operational stability. At this time, the feed plate 40 can place the used stretch film cylinder on the outside of the placement table 1, which facilitates subsequent processing by personnel. After the stretch film cylinder is released, the feed plate 40 can return to its original position, waiting for the next feeding operation. Then, after the stretch film cylinder is released, the third cylinder 27 at the designated position can drive the partition plate 25 to move outward, thereby opening the bottom of the raw material box 23. At this time, the stretch film cylinder above the partition plate 25 can fall naturally downward and land on the bearing plate 13 at the top of the feeding rack 15. And at the same time as the stretch film cylinder falls...The relative movement of the clamping arms 20 enables a slow inward movement, clamping the stretching film cylinder as it falls onto the support plate 13. This prevents the stretching film cylinder from tilting and affecting subsequent assembly operations. After the stretching film cylinder is clamped, the clamping arms 20 can slowly move towards the position of the work frame 26 via the operation of the second lead screw 12. When moving closer, the support plate 13 will contact the bottom of the work frame 26, and the compression of the spring 14 will cause the support plate 13 to retract into the feeding frame 15. This prevents the feeding rack 15 from becoming too long and prevents the clamping arm 20 from being unable to extend into the working frame 26 due to the fixed bearing plate 13. After the feeding rack 15 moves to the designated position, the clamping arm 20 can move the stretching film cylinder between the two sets of contact plates 10. Then, the return of the fourth cylinder 35 can drive the docking column 33 to return to its original position, thereby realizing the fixing operation of the stretching film cylinder for convenient subsequent use. Then the feeding rack 15 can return to its original position, and the second cylinder 5 retracts to drive the outer extension arm 36 to move closer to the stretching film cylinder. When the outer extension arm 36 moves, it can drive the connecting plate 37 to move synchronously. Then, when the outer extension arm 36 moves to the designated position, the retraction of the first cylinder 3 can drive the connecting plate 37 to move inward, thereby causing the adsorption strip 38 on its surface to move towards the surface of the stretch film cylinder. This allows the suction cup 39 on the surface of the adsorption strip 38 to contact the stretch film on the surface of the stretch film cylinder. Then, the operation of the vacuum pump 34 can cause the suction cup 39 to adsorb the stretch film. After resetting, the stretch film can be pulled outward, which facilitates subsequent use by personnel. At the same time, after the stretch film is pulled out, the return of the two sets of auxiliary rollers 24 can guide the stretch film. Since the maximum movable distance of the auxiliary rollers 24 has a certain difference, there can be a certain front and back area between the two auxiliary rollers 24, which allows the stretch film to have a certain pulling tendency between the auxiliary rollers 24, thus ensuring the flatness and temperature of the stretch film output, which facilitates better subsequent coating and packaging of cartons containing disposable products. The device as a whole has the advantages of easy operation, high safety, and timely film replacement.

[0045] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A fully automatic sequential joint membrane replacement structure, comprising a placement platform (1) and an auxiliary slope (45), characterized in that, The placement platform (1) has symmetrical adjustment slots (11) on one side of its top. A second lead screw (12) is installed inside the adjustment slot (11). One end of the second lead screw (12) passes through one side of the adjustment slot (11) and is connected to a second motor (16). The adjustment slot (11), the second motor (16), and the second lead screw (12) are all provided in two sets and are all independently set. A feeding frame (15) and a feeding seat (44) are respectively sleeved on the outer periphery of the second lead screw (12). The feeding frame (15) and the feeding seat (44) are slidably connected to the adjustment slot (11). A fourth motor (43) is installed inside the feeding seat (44). The output end of the fourth motor (43) passes through one side of the feeding seat (44) and is connected to the feeding plate (40). The surface of the feeding frame (15) and the surface of the feeding plate (40) are respectively connected to the feeding plate (15). Several sets of mounting slots (17) are symmetrically provided. A moving block (18) is symmetrically slidably connected inside the mounting slot (17). A hydraulic rod (19) is installed at one end of the moving block (18). The hydraulic rod (19) is located inside the mounting slot (17). A clamping arm (20) is welded to one end of the moving block (18). An arc groove is provided on the surface of the clamping arm (20). A bearing plate (13) is slidably connected to one side of the bottom of the feeding rack (15). A spring (14) is connected to one end of the bearing plate (13) at the bottom of the feeding rack (15). A support plate (42) is welded to the bottom of the unloading plate (40) and the top of the unloading seat (44). Several sets of support rods (41) are rotated around the support plates (42). The support rods (41) are welded to the bottom of the unloading plate (40).

2. The fully automatic sequential joint membrane replacement structure according to claim 1, characterized in that, A working groove (29) is provided in the middle of one side surface of the placement platform (1). A third lead screw (30) is installed inside the working groove (29). One end of the third lead screw (30) passes through one side of the working groove (29) and is connected to a third motor (31). A movable seat (22) is sleeved on the outer periphery of the third lead screw (30). A working frame (26) is welded to one end of the movable seat (22). Several sets of fourth cylinders (35) are symmetrically installed on the inner sides of both ends of the working frame (26). A limit plate (32) is installed at one end of the fourth cylinder (35). A docking column (33) is installed in the middle of the surface of the limit plate (32). The docking column (33) is connected to the surface of the working frame (26). A contact plate (10) is installed around the bottom of the inner surface of the working frame (26) of the docking column (33). A weighing sensor (9) is installed at the bottom of the contact plate (10) where it contacts the surface of the working frame (26).

3. The fully automatic sequential joint replacement membrane structure according to claim 2, characterized in that, The working frame (26) has several sets of drive slots (6) staggered on its inner surface. A first lead screw (7) is installed inside the drive slot (6). One end of the first lead screw (7) passes through one side of the working frame (26) and is connected to the first motor (8). A moving head (21) is sleeved on the outer periphery of the first lead screw (7). An auxiliary roller (24) is rotatably connected to the top of the moving head (21).

4. The fully automatic sequential joint replacement membrane structure according to claim 2, characterized in that, The working frame (26) has symmetrical moving slots (4) on both sides of one end surface. A second cylinder (5) is located inside the moving slot (4). One end of the second cylinder (5) is connected to an outer extension arm (36). The outer extension arm (36) is slidably connected to the moving slot (4). A first cylinder (3) is installed inside one side surface of the outer extension arm (36). One end of the first cylinder (3) is connected to a connecting plate (37). The connecting plate (37) is slidably connected to the outer extension arm (36). An adsorption strip (38) is fixedly installed between the connecting plates (37). Several sets of suction cups (39) are evenly installed on the surface of the adsorption strip (38).

5. The fully automatic sequential joint membrane replacement structure according to claim 2, characterized in that, An air pump (34) is installed on one side of the top of the work frame (26). The air pump (34) is connected to the suction cup (39) through a pipe and a solenoid valve.

6. The fully automatic sequential joint membrane replacement structure according to claim 1, characterized in that, An electric turntable (2) is installed at the top center of the placement platform (1).

7. The fully automatic sequential joint membrane replacement structure according to claim 1, characterized in that, An auxiliary ramp (45) is installed on one side of the top of the placement platform (1) at the outer periphery of the electric turntable (2).

8. The fully automatic sequential joint membrane replacement structure according to claim 1, characterized in that, A raw material box (23) is fixedly installed on the surface of the placement platform (1) directly above the feeding rack (15). The raw material box (23) has a placement hole (28) inside. A partition plate (25) is slidably connected inside the placement hole (28). One end of the partition plate (25) passes through one side of the raw material box (23) and is connected to the third cylinder (27).

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