Roll changing mechanism of continuous-roll bag making machine

Abstract

The invention discloses a roll changing mechanism of a continuous roll bag making machine. The roll changing mechanism comprises a rack, a rolling device, a finished product output device and a roll changing device. The winding device comprises a first paper pipe fitting and a second paper pipe fitting which are arranged on a winding station, and the first paper pipe fitting and the second paper pipe fitting are arranged left and right and rotationally arranged on the rack. The finished product output device comprises a receiving part which ascends and descends between a winding station and an unloading station; the roll changing device comprises a paper tube conveying part and a tube winding part which enables the disconnected rolling bag body to cover the paper tube, and the tube winding part moves between a standby station and a rolling station; during roll replacement, the receiving component moves downwards to give way after receiving a winding drum at the winding station, the paper tube conveying component conveys a paper tube to the winding station, the two ends of the paper tube are fixed by the first paper tube piece and the second paper tube piece, and the tube winding component moves to the winding station and wraps the paper tube at the winding station with a rolling bag body disconnected from the winding drum. Automatic winding, discharging and paper tube feeding are achieved.

Description

Technical Field

[0001] This invention relates to the field of film bag making machines, specifically a roll changing mechanism for a continuous roll bag making machine. Background Technology

[0002] In a continuous roll bag making machine, the formed bag bodies are connected, and the winding device winds the formed bag bodies onto a paper tube. After winding, the finished roll is unloaded and a new paper tube is installed. Existing continuous roll bag making machines typically use dual-station or multi-station winding units. Multiple winding units are mounted on a turntable. One winding unit winds at a winding station, while another waiting at a waiting station. Once the winding unit at the winding station has finished winding, the turntable rotates the waiting winding unit to the winding station, and the completed winding unit rotates to an empty position for unloading. This structure occupies a large space and requires manual unloading and paper tube loading, therefore existing continuous roll bag making machines still need improvement. Summary of the Invention

[0003] In view of the technical problems existing in the background art, the technical problem to be solved by the present invention is to provide a new type of roll changing mechanism for a continuous roll bag making machine.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: the roll changing mechanism of the continuous roll bag making machine is characterized by including a frame, a winding device, a finished product output device and a roll changing device; The winding device includes a first paper tube and a second paper tube disposed at the winding station. The first paper tube and the second paper tube are disposed side by side and rotatably mounted on the frame. The finished product output device includes a receiving component that moves up and down between the winding station and the unloading station. The roll changing device includes a paper tube conveying component and a tube winding component that covers the disconnected continuous roll bag body outside the paper tube. The tube winding component moves between the standby station and the rewinding station. During roll changing, the receiving component receives the roll at the winding station and then moves downwards to make way. The paper tube conveying component delivers the paper tube to the winding station, and both ends of the paper tube are fixed by the first paper tube fitting and the second paper tube fitting. The winding component moves to the winding station and wraps the continuous roll bag body, which is disconnected from the roll, around the paper tube at the winding station. This invention achieves automatic winding, unloading, and paper tube loading, and has a reasonable structural design and occupies a small area.

[0005] Preferably, the tube winding component includes a first arm, a second arm, and a third arm. The two ends of the second arm are rotatably connected to the first arm and the third arm, respectively. A first pressure roller is rotatably mounted on the first arm, and a second pressure roller and a third pressure roller are rotatably mounted on the third arm. The first pressure roller, the second pressure roller, and the third pressure roller are arranged sequentially. During winding, the first arm moves to the rewinding position, causing the first pressure roller to press against one side of the paper tube and hold the continuous roll bag body in place. The beginning of the continuous roll bag body is at least at the third pressure roller. Then, the second arm swings upward relative to the first arm to the bottom of the paper tube, where the second and third pressure rollers support the continuous roll bag body. Subsequently, the third arm swings upward relative to the second arm to the other side of the paper tube, where the second and third pressure rollers press the continuous roll bag body against the paper tube, causing the continuous roll bag body to cover the surface of the paper tube. The first pressure roller presses the continuous roll bag body against one side of the paper tube, and the second and third arms swing in sequence. The second and third pressure rollers cause the continuous roll bag body to pass under the paper tube and cover the other side of the paper tube. The area of ​​the continuous roll bag body covering the circumference of the paper tube is large, and the first, second, and third pressure rollers press the continuous roll bag body and the paper tube together, increasing the friction between them. In this way, the rotation of the paper tube drives the continuous roll bag body to rewind.

[0006] Preferably, the receiving device includes a front clamp and a rear clamp that can move back and forth; During roll changing, the front and rear clamping plates hold the roll down to below the third pressure roller, which then pushes the continuous roll bag to disconnect it from the roll. The roll is held by the front and rear clamping plates, while the continuous roll bag above is pressed down by the first pressure roller. The swinging of the second arm causes the third pressure roller to push the continuous roll bag, and the continuous roll bag automatically breaks along the break line due to the force applied.

[0007] Preferably, the second and third pressure rollers are positioned below and above the center of the paper tube, respectively, where they press against the paper tube. This reasonably expands the coverage area of ​​the continuous roll bag.

[0008] The first arm is oscillatingly mounted on the frame, and the frame is provided with a first driving component that drives the first arm to oscillate between the standby station and the winding station; The second arm is driven by a second drive member that drives it to swing relative to the first arm, and the third arm is driven by a third drive member that drives it to swing relative to the second arm.

[0009] Preferably, the roll changing device further includes a paper tube compartment, and the bottom of the paper tube compartment is provided with a paper tube outlet; The paper tube conveying component includes a feed plate that moves back and forth and an upper baffle, the upper baffle being above the feed plate; When the paper tube is picked up, the feeding plate moves to a position directly below the paper tube outlet, and the upper baffle moves away from the paper tube outlet; When feeding the paper tube, the feeding plate moves to the winding station, and the upper baffle blocks the paper tube outlet.

[0010] Preferably, the frame includes an outer wall panel and an inner wall panel. The outer wall panel includes a left wall panel, a right wall panel, an upper crossbeam, and a lower crossbeam. The two ends of the upper and lower crossbeams are connected to the left and right wall panels, respectively. The inner wall panel includes a first wall panel and a second wall panel. The first and second wall panels are movably mounted on the upper and lower crossbeams. The first and second wall panels can move relative to each other to adjust the distance between them. The first paper tube and the second paper tube are rotatably mounted on the first wall panel and the second wall panel, respectively. The plugs of the first paper tube and the second paper tube are arranged facing each other and are located between the first wall panel and the second wall panel.

[0011] The spacing between the inner wall panels can be adjusted according to the length of the paper tube, without the need to replace the first and second paper tubes. This makes the operation simple and efficient. Moreover, if the first and second paper tubes remain unchanged, their load-bearing capacity will remain stable and their service life will be long.

[0012] Preferably, the first paper tube is connected to a motor that drives its rotation; Both the first paper tube and the second paper tube include a rotating shaft, the plug is connected to the rotating shaft, and at least one of the rotating shafts of the first paper tube and the second paper tube is capable of axial movement; The axially movable shaft is a movable shaft. A keyway is provided on the circumferential side of the movable shaft. A bushing is fitted over the movable shaft, and the bushing has a key pin that matches the keyway. The movable shaft is rotatably mounted on the corresponding wall plate via the bushing. Axial movement of the shaft actively releases or clamps the paper tube; the cooperation between the movable shaft and the bushing allows the shaft to both rotate and move axially, without affecting each other.

[0013] Preferably, the receiving component includes a lifting seat that can move up and down, and a front clamping plate and a rear clamping plate that can move back and forth. During unloading, the lifting seat drives the front clamp and the rear clamp to rise to the winding station. The front clamp and the rear clamp move towards each other to clamp the roll. Then, the first paper tube and the second paper tube release the paper tube. The lifting seat drives the front clamp and the rear clamp to move the roll down to the unloading station.

[0014] Preferably, the finished product output device further includes a discharge component, which includes a receiving plate. The receiving plate is located below the front clamping plate and the rear clamping plate holding the roll, and the discharge end of the receiving plate extends to the front of the front clamping plate. The front clamping plate moves up and down on the lifting seat. After the front clamping plate and the rear clamping plate receive the material and descend to the unloading position, the front clamping plate and the rear clamping plate release the drum and the front clamping plate moves down to make room.

[0015] Preferably, the roll changing device further includes a paper tube compartment, which includes a first bracket and a second bracket arranged on the left and right sides, respectively mounted on a first wall panel and a second wall panel. The receiving component is provided in two sets, left and right, namely a first receiving component and a second receiving component, which are respectively installed on the first wall panel and the second wall panel. The receiving plate is provided in two sets, left and right, namely the first receiving plate and the second receiving plate, which are respectively installed on the first wall panel and the second wall panel.

[0016] When the length of the paper tube changes, the width of the paper tube compartment and the distance between the two receiving components and the receiving plate also need to be adjusted accordingly. This invention adjusts the width of the paper tube compartment when adjusting the distance between the first wall plate and the second wall plate, without the need for additional adjustments to the paper tube compartment, receiving components, and receiving plates, thus greatly improving adjustment efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the present invention with a short paper tube installed.

[0018] Figure 2 This is a schematic diagram of the present invention with a long paper tube installed.

[0019] Figure 3 This is a side view of the present invention.

[0020] Figure 4 This is the roll-changing state of the present invention. Figure 1 .

[0021] Figure 5 This is the roll-changing state of the present invention. Figure 2 .

[0022] Figure 6 This is the roll-changing state of the present invention. Figure 3 .

[0023] Figure 7 This is the roll-changing state of the present invention. Figure 4 .

[0024] Figure 8 This is the roll-changing state of the present invention. Figure 5 .

[0025] Attached reference numerals: 1. Frame; 11. Left wall panel; 12. Right wall panel; 13. First wall panel; 14. Second wall panel; 15. Upper crossbeam; 16. Lower crossbeam; 17. Guide rail; 2. Paper tube; 21. Roll; 22. Continuous roll bag body; 23. Point break line; 3. Rewinding device; 31. End cap; 32. Rotating shaft; 33. Bushing; 34. Motor; 35. Connecting plate; 36. Cylinder; 37. First paper tube fitting; 38. Second paper tube fitting; 4. Finished product output device 41. First receiving component; 42. Second receiving component; 43. Lifting seat; 44. Front clamping plate; 45. Rear clamping plate; 46. Receiving plate; 5. Paper tube compartment; 51. First bracket; 52. Second bracket; 53. Paper tube outlet; 6. Winding component; 61. First arm; 62. Second arm; 63. Third arm; 64. First pressure roller; 65. Second pressure roller; 66. Third pressure roller; 7. Paper tube conveying component; 71. Feeding plate; 72. Upper baffle; Detailed Implementation

[0026] The following describes the embodiments and related details and working principles of the present invention with reference to the accompanying drawings. The roll-changing mechanism of this continuous roll bag making machine includes a frame 1, a winding device 3, a finished product output device 4, and a roll-changing device; the winding device 3 includes a first paper tube 37 and a second paper tube 38 disposed at the winding station, the first and second paper tubes being arranged side-by-side and rotatably mounted on the frame 1. The first paper tube 37 and the second paper tube 38 fix both ends of the paper tube, and all three rotate together during rotation; the rotation of the first and second paper tubes can be driven by a motor 34 or by a friction roller driving the paper tube to rotate. Figure 1In the process, the first paper tube 37 is rotated by the motor 34, causing the paper tube and the second paper tube 38 to rotate together. The finished product output device 4 includes a receiving component that moves up and down between the winding station and the unloading station. The roll changing device includes a paper tube conveying component 7 and a winding component 6 that wraps the disconnected continuous roll bag body around the paper tube. The winding component 6 moves between the standby station and the winding station. During winding, the first paper tube 37 and the second paper tube 38 fix the paper tube 2. The motor 34 drives the first paper tube 37 to rotate, and the paper tube fixed by the first paper tube 37 and the second paper tube 38 rotate accordingly. The rotation of the paper tube 2 causes the continuous roll bag body to be wound around the paper tube to form a roll 21. The continuous roll bag body 22 is the finished bag body processed from the roll material by the bag making machine. These continuous finished bags are usually subjected to point-cutting treatment when sealing, that is, the adjacent bags are separated by point-cutting knives to form easy-tear point-cutting lines 23. This can keep the bags connected, and the bags can also be separated by external force along the point-cutting lines 23. When the diameter of the roll 21 reaches the preset value or the number of wound bags reaches the preset number, the roll needs to be changed. The roll is unloaded, a new paper tube is installed, and the roll is separated from the continuous roll bag body 22 along the point-cutting lines 23. The separated continuous roll bag body is then wound on the new paper tube. During roll changing, the receiving component receives the roll at the winding station and then moves down to make way. The paper tube conveying component 7 delivers the paper tube to the winding station, and both ends of the paper tube are fixed by the first paper tube component 37 and the second paper tube component 38. The winding component 6 moves to the winding station and wraps the continuous roll bag body, which is disconnected from the roll, around the paper tube at the winding station. The first paper tube component 37 rotates to make the new paper tube rotate for winding, thus realizing automatic roll changing.

[0027] The frame 1 includes an outer wall panel and an inner wall panel, which include, but are not limited to, frame structures and panel structures. The outer wall panel includes a left wall panel 11, a right wall panel 12, an upper crossbeam 15, and a lower crossbeam 16. The two ends of the upper and lower crossbeams are connected to the left and right wall panels, respectively. The base of the frame 1 can also serve as the lower crossbeam 16. The inner wall panel includes a first wall panel 13 and a second wall panel 14, which are movably mounted on the upper and lower crossbeams 15 and 16, respectively. The first and second wall panels can move relative to each other to adjust their spacing. For ease of movement, guide rails 17 are installed on both the upper and lower crossbeams 15 and 16. A first slider and a second slider are slidably mounted on the guide rails 17. The first slider is mounted on the first wall panel, and the second slider is mounted on the second wall panel. The lateral position of the first wall panel 13 and the second wall panel 14 is adjusted by sliding along the guide rails, providing convenient and stable adjustment.

[0028] The first paper tube 37 is rotatably mounted on the first wall plate 13, and the second paper tube 38 is rotatably mounted on the second wall plate 14. The end caps 31 of the first and second paper tubes are arranged facing each other and positioned between the first and second wall plates. During winding, the end caps 31 of the first and second paper tubes 37 and 38 clamp both ends of the paper tube. If the length of the paper tube changes, the distance between the two end caps needs to be adjusted accordingly. This invention changes the distance between the two end caps by adjusting the distance between the first and second wall plates, so that it matches the length of the paper tube. This invention eliminates the need to replace the first and second paper tubes 37 and 38, making operation simpler and more efficient. Moreover, if the first and second paper tubes 37 and 38 remain unchanged, their load-bearing capacity remains stable, resulting in a long service life.

[0029] The plugs 31 of the first paper tube 37 and the second paper tube 38 are frustoconical or conical, with a portion of the plug 31 extending into the inner hole of the paper tube, thus clamping the paper tube and improving the clamping effect. Both the first paper tube 37 and the second paper tube 38 include a rotating shaft 32, and the plug 31 is connected to the rotating shaft 32. At least one rotating shaft 32 of the first paper tube 37 and the second paper tube 38 is axially movable; in the figure, both rotating shafts 32 are axially movable. Before clamping, the first paper tube 37 and the second paper tube 38 increase the distance between them through axial movement. When the paper tube is fed between the two paper tubes, the first paper tube 37 and the second paper tube 38 move towards each other to clamp the paper tube. The rotating shaft 32 needs to move axially and rotate circumferentially. The axially moving shaft is a movable shaft. The circumferential side of the movable shaft has a keyway. A bushing 33 is fitted over the movable shaft, and the bushing has a key pin that matches the keyway. The movable shaft is rotatably mounted on the corresponding wall plate through the bushing. The cooperation between the movable shaft and the bushing allows the rotating shaft 32 to rotate and move axially without affecting each other. A spline shaft is also a type of movable shaft. The winding device 3 includes a cylinder 36 that drives the axial movement of the movable shaft. The cylinder is mounted on the wall plate corresponding to the movable shaft. The movable shaft is connected to a connecting plate 35, and a bearing is provided between the movable shaft and the connecting plate. The driving end of the cylinder 36 is connected to the connecting plate 35. The cylinder drives the connecting plate to move left and right, thereby driving the movable shaft to move axially.

[0030] The roll changing device also includes a paper tube compartment 5, see attached. Figure 3The paper tube bin 5 and the winding component 6 are respectively located behind and in front of the winding station. The front of the winding station is the standby station for the winding component 6, and the rear of the winding station is the paper tube bin 5. Their positions can be interchanged. The bottom of the paper tube bin 5 has a paper tube outlet 53. The paper tube conveying component 7 includes a feed plate 71 that moves back and forth and an upper baffle 72. The upper baffle is above the feed plate. When picking up a paper tube, the feed plate 71 moves backward to be directly below the paper tube outlet 53, the upper baffle 72 moves away from the paper tube outlet, the paper tube outlet opens, and the paper tube in the paper tube bin 5 automatically falls onto the feed plate. When feeding a paper tube, the feed plate moves forward to the winding station, and the upper baffle 72 blocks the paper tube outlet 53 to prevent the paper tube in the paper tube bin 5 from being discharged. After the paper tube is in place, the first paper tube component 37 and the second paper tube clamp the paper tube, at which point the feed plate can retract and reset. The paper tube on the feeding plate 71 is at the same height as the winding station. The feeding plate 71 only needs to move back and forth. The upper baffle 72 is connected to the feeding plate 71. Only one drive unit is needed to realize the feeding and loading of the paper tube. See appendix. Figure 1 The paper tube compartment 5 includes a first bracket 51 and a second bracket 52 arranged on the left and right sides, respectively mounted on a first wall panel and a second wall panel. The first bracket 51 and the second bracket 52 support both ends of the paper tube, and the paper tube is stored horizontally in the paper tube compartment. When the length of the paper tube changes, only the distance between the first wall panel 13 and the second wall panel 14 needs to be adjusted to change the width of the paper tube compartment accordingly, thus eliminating the need for additional adjustment of the paper tube compartment 5 and greatly improving efficiency.

[0031] The winding component 6 includes a first arm 61, a second arm 62, and a third arm 63. The two ends of the second arm are rotatably connected to the first and third arms, respectively. A first pressure roller 64 is rotatably mounted on the first arm 61, and a second pressure roller 65 and a third pressure roller 66 are rotatably mounted on the third arm 63. The first, second, and third pressure rollers are arranged sequentially. During winding, the first arm 61 moves to the winding station, causing the first pressure roller 64 to press against one side of the paper tube and press against the continuous roll bag body. In the figure, the first pressure roller 64 presses against the front side of the paper tube. The beginning of the continuous roll bag body is at least at the third pressure roller, indicating that winding is complete. The receiving component moves upward to the winding station, and the first paper tube component 37 and the second paper tube component 38 loosen the paper tube. The receiving component receives the roll and moves downward to the unloading station. The third pressure roller is between the winding station and the unloading station, and the continuous roll bag body is disconnected from the roll. The end of the continuous roll bag is at least at the third pressure roller, preferably below it. Then, the second arm 62 swings upward relative to the first arm 61 to below the paper tube. The second pressure roller 65 and the third pressure roller 66 support the continuous roll bag, allowing it to pass under the paper tube. Next, the third arm 63 swings upward relative to the second arm 62 to the other side of the paper tube, i.e., the rear side. The second pressure roller 65 and the third pressure roller 66 press the continuous roll bag against the paper tube, covering its surface. To ensure a wide and snug coverage area, the second pressure roller 65 and the third pressure roller 66 are positioned below and above the center of the paper tube, respectively. This ensures a wide coverage area of ​​the paper tube, while the outer circumference of the paper tube is pressed against the first pressure roller 64, the second pressure roller 65, and the third pressure roller 66. This friction between the paper tube and the continuous roll bag causes the paper tube to rotate, driving the continuous roll bag to wind up. To facilitate control of each arm's operation, the first arm 61 is oscillatingly mounted on the frame 1, which is equipped with a first drive unit that drives the first arm 61 to oscillate between the standby and winding positions; the second arm 62 is driven by a second drive unit that drives it to oscillate relative to the first arm 61; and the third arm 63 is driven by a third drive unit that drives it to oscillate relative to the second arm 62. The second and third drive units are respectively mounted on the first arm 61 and the second arm 62, and the drive unit can be a cylinder 36.

[0032] When the paper tube is finished winding, it is unloaded through the finished product output device 4. The receiving component of the finished product output device 4 includes a lifting seat 43 that can move up and down, and a front clamping plate 44 and a rear clamping plate 45 that can move back and forth. During unloading, the lifting seat 43 drives the front clamping plate and the rear clamping plate to rise to the winding station. The front clamping plate and the rear clamping plate are in front of and behind the roll respectively. The front clamping plate and the rear clamping plate move towards each other to clamp the roll. The clamping ends of the front clamping plate 44 and the rear clamping plate 45 are arc-shaped and fit against the surface of the roll, clamping it firmly. Then, the first paper tube 37 and the second paper tube 38 release the paper tube. The lifting seat 43 drives the front clamping plate and the rear clamping plate to move the roll down to the unloading station, and the winding station becomes empty. The first paper tube 37 and the second paper tube 38 then receive new paper tubes for winding. The forward and backward movement of the front clamping plate 44 and the rear clamping plate 45, the lifting and lowering of the lifting seat 43, and the forward and backward movement of the feeding plate 71 can all be driven directly by the cylinder 36 or indirectly by the motor 34 in combination with the lead screw mechanism, synchronous belt, etc.

[0033] The adjacent bags of the continuous roll bag body have a break line 23 between them. After the roll is wound up, the continuous roll bag body and the roll can be separated by external force along the break line 23. This invention separates the continuous roll bag body from the roll through the cooperation of the winding tube component 6 and the receiving component. See attached document. Figure 6-8 When changing rolls, the front and rear clamping plates hold the roll and move it down to below the third pressure roller 66. When the winding tube component 6 performs the winding operation, the third pressure roller swings counterclockwise relative to the roll below. The third pressure roller 66 pushes the continuous roll bag body to disconnect it from the roll. Specifically, the roll is held by the front clamping plate 44 and the rear clamping plate 45, and the continuous roll bag body above is pressed down by the first pressure roller 64. The second arm 62 swings so that the third pressure roller presses against the continuous roll bag body. The continuous roll bag body is subjected to force and automatically disconnects along the point break line 23.

[0034] The finished product output device 4 also includes a discharge component, which includes a receiving plate 46. The receiving plate 46 is located below the front clamping plate and the rear clamping plate, holding the drum. The discharge end of the receiving plate 46 extends to the front of the front clamping plate 44. The front clamping plate 44 moves up and down on the lifting seat 43. After the front clamping plate and the rear clamping plate receive the material and descend to the unloading position, the front clamping plate and the rear clamping plate release the drum, and the front clamping plate 44 moves down to make room. The drum enters the receiving plate 46. If the receiving plate 46 is tilted and the receiving end of the receiving plate 46 is higher than the discharge end, the drum automatically rolls forward to the discharge end, facilitating handling operations. The drum can be pushed forward by external force to leave the unloading position.

[0035] The receiving components are provided in two sets, left and right, namely a first receiving component and a second receiving component, which are respectively mounted on the first wall plate 13 and the second wall plate 14. The receiving plate 46 is provided in two sets, left and right, namely a first receiving plate and a second receiving plate, which are respectively mounted on the first wall plate 13 and the second wall plate 14. Similarly, when the length of the paper tube changes, only the distance between the first wall plate and the second wall plate needs to be adjusted, without the need to adjust the distance between the two receiving components or the receiving plate separately.

[0036] The working principle of the preferred embodiment will be further explained below with reference to the accompanying drawings: Figure 3 In the initial state, the two ends of the paper tube are clamped by the first paper tube component 37 and the second paper tube component 38 and rotate under the drive of the first paper tube component 37. The continuous roll bag body passes over the feed roller above the winding station, enters the winding station and is wound on the paper tube. Figure 4 The front clamping plate 44 and the rear clamping plate 45 clamp the roll at the winding station; Figure 5 The front clamping plate 44 and the rear clamping plate 45 clamp the paper feeding and unloading station, and the feeding plate 71 sends the new paper tube to the winding station. Figure 6 The first arm 61 swings to the winding station; Figure 7 The continuous roll bag body is disconnected from the roll, and the second arm 62 swings to below the paper tube; Figure 8 The continuous roll bag is wound around the outside of the paper tube.

[0037] When the number of bags wound with paper tubes reaches a preset quantity, the lifting seat 43 moves upward, causing the front clamping plate 44 and the rear clamping plate 45 to move to the winding station. The front clamping plate 44 and the rear clamping plate 45 move towards each other to clamp the roll, and the first paper tube component 37 and the second paper tube component 38 release the paper tubes. The lifting seat 43 moves downward to the unloading station, and the feeding plate 71 moves forward to the winding station. The first paper tube component 37 and the second paper tube component 38 clamp the paper tubes on the feeding plate 71, and the feeding plate 71 retracts to reset and receives new paper tubes. The roll is fed to the unloading station. The continuous bag body is between the three pressure rollers and the paper tube. The first arm 61 swings backward to the winding station. The first pressure roller 64 presses against the paper tube and holds the continuous bag body in place. The second arm 62 swings upward to below the paper tube. During its swing, the third pressure roller 66 presses against the continuous bag body, causing it to break along the break line 23. The broken continuous bag body then passes under the paper tube along with the second pressure roller 65 and the third pressure roller 66. The third arm 63 continues to swing upward, and the second pressure roller 65 and the third pressure roller 66 support the continuous bag body and press it against the paper tube, so that the continuous bag body covers the surface of the paper tube. After the first paper tube component 37 and the second paper tube component 38 clamp the paper tube, the paper tube rotates under the drive of the motor 34. When the continuous bag body covers the outside of the paper tube, the paper tube pulls the continuous bag body, causing it to wind around the outside of the paper tube and enter the winding process. After winding is completed, the third arm 63 and the second arm 62 are reset in sequence, and the first arm 61 swings forward to the standby position. After the continuous roll bag body is disconnected, the front clamping plate 44 and the rear clamping plate 45 move forward and backward respectively to release the roll. The front clamping plate 44 moves down to make way for the roll, and the roll moves to the discharge end of the receiving plate 46. The front clamping plate 44 moves up to wait for the next receiving.

Claims

1. A roll-changing mechanism for a continuous roll bag making machine, characterized in that: It includes a frame, a winding device, a finished product output device, and a roll changing device; The winding device includes a first paper tube and a second paper tube disposed at the winding station. The first paper tube and the second paper tube are disposed side by side and rotatably mounted on the frame. The finished product output device includes a receiving component that moves up and down between the winding station and the unloading station. The roll changing device includes a paper tube conveying component and a tube winding component that covers the disconnected continuous roll bag body outside the paper tube. The tube winding component moves between the standby station and the rewinding station. During roll changing, the receiving component receives the roll at the winding station and then moves down to make way. The paper tube conveying component delivers the paper tube to the winding station, and both ends of the paper tube are fixed by the first paper tube component and the second paper tube component. The winding component moves to the winding station and wraps the continuous roll bag body, which is disconnected from the roll, around the paper tube at the winding station.

2. The roll changing mechanism of the continuous roll bag making machine according to claim 1, characterized in that: The tube winding component includes a first arm, a second arm, and a third arm. The two ends of the second arm are rotatably connected to the first arm and the third arm, respectively. A first pressure roller is rotatably mounted on the first arm, and a second pressure roller and a third pressure roller are rotatably mounted on the third arm. The first pressure roller, the second pressure roller, and the third pressure roller are arranged sequentially. During winding, the first arm moves to the winding station, causing the first pressure roller to press against one side of the paper tube and hold down the continuous roll bag body. The beginning of the continuous roll bag body is at least at the third pressure roller. Then, the second arm swings upward relative to the first arm to the bottom of the paper tube. The second and third pressure rollers support the continuous roll bag body. Then, the third arm swings upward relative to the second arm to the other side of the paper tube. The second and third pressure rollers press the continuous roll bag body against the paper tube, so that the continuous roll bag body covers the surface of the paper tube.

3. The roll changing mechanism of the continuous roll bag making machine according to claim 2, characterized in that: The receiving device includes a front clamping plate and a rear clamping plate that can move back and forth. When changing rolls, the front and rear clamping plates hold the roll and move it down to below the third pressure roller. The third pressure roller pushes the continuous roll bag to disconnect it from the roll.

4. The roll changing mechanism of the continuous roll bag making machine according to claim 2, characterized in that: The second and third pressure rollers are pressed against the paper tube at points below and above the center of the paper tube, respectively. The first arm is oscillatingly mounted on the frame, and the frame is provided with a first driving component that drives the first arm to oscillate between the standby station and the winding station; The second arm is driven by a second drive member that drives it to swing relative to the first arm, and the third arm is driven by a third drive member that drives it to swing relative to the second arm.

5. The roll changing mechanism of the continuous roll bag making machine according to claim 1, characterized in that: The roll changing device also includes a paper tube compartment, and the bottom of the paper tube compartment is provided with a paper tube outlet; The paper tube conveying component includes a feed plate that moves back and forth and an upper baffle, the upper baffle being above the feed plate; When the paper tube is picked up, the feeding plate moves to a position directly below the paper tube outlet, and the upper baffle moves away from the paper tube outlet; When feeding the paper tube, the feeding plate moves to the winding station, and the upper baffle blocks the paper tube outlet.

6. The roll changing mechanism of the continuous roll bag making machine according to claim 1, characterized in that: The frame includes an outer wall panel and an inner wall panel. The outer wall panel includes a left wall panel, a right wall panel, an upper crossbeam, and a lower crossbeam. The two ends of the upper and lower crossbeams are connected to the left and right wall panels, respectively. The inner wall panel includes a first wall panel and a second wall panel. The first and second wall panels are movably mounted on the upper and lower crossbeams. The first and second wall panels can move relative to each other to adjust the distance between them. The first paper tube and the second paper tube are rotatably mounted on the first wall panel and the second wall panel, respectively. The plugs of the first paper tube and the second paper tube are arranged facing each other and are located between the first wall panel and the second wall panel.

7. The roll changing mechanism of the continuous roll bag making machine according to claim 6, characterized in that: The first paper tube is connected to a motor that drives its rotation; Both the first paper tube and the second paper tube include a rotating shaft, the plug is connected to the rotating shaft, and at least one of the rotating shafts of the first paper tube and the second paper tube is capable of axial movement; The axially movable shaft is a movable shaft. The circumferential side of the movable shaft is provided with a keyway. The movable shaft is fitted with a bushing, and the bushing is provided with a key pin that matches the keyway. The movable shaft is rotatably mounted on the corresponding wall panel through the bushing.

8. The roll changing mechanism of the continuous roll bag making machine according to claim 6, characterized in that: The receiving component includes a lifting seat that moves up and down, and a front clamping plate and a rear clamping plate that move back and forth. During unloading, the lifting seat drives the front clamp and the rear clamp to rise to the winding station. The front clamp and the rear clamp move towards each other to clamp the roll. Then, the first paper tube and the second paper tube release the paper tube. The lifting seat drives the front clamp and the rear clamp to move the roll down to the unloading station.

9. The roll changing mechanism of the continuous roll bag making machine according to claim 8, characterized in that: The finished product output device also includes a discharge component, which includes a receiving plate. The receiving plate is located below the front clamping plate and the rear clamping plate holding the roll, and the discharge end of the receiving plate extends to the front of the front clamping plate. The front clamping plate moves up and down on the lifting seat. After the front clamping plate and the rear clamping plate receive the material and descend to the unloading position, the front clamping plate and the rear clamping plate release the drum and the front clamping plate moves down to make room.

10. The roll changing mechanism of the continuous roll bag making machine according to claim 9, characterized in that: The roll changing device also includes a paper tube compartment, which includes a first bracket and a second bracket arranged on the left and right sides, respectively mounted on a first wall panel and a second wall panel. The receiving component is provided in two sets, left and right, namely a first receiving component and a second receiving component, which are respectively installed on the first wall panel and the second wall panel. The receiving plate is provided in two sets, left and right, namely the first receiving plate and the second receiving plate, which are respectively installed on the first wall panel and the second wall panel.

Images