A film center winder

Abstract

The present application relates to the technical field of winding machine, specifically relates to a kind of film center winding machine, including rack and friction roller, the rear and front of friction roller are respectively equipped with transmission assembly and transfer assembly, second gas inflation shaft is installed in transfer assembly, and the surface of second gas inflation shaft is in abutment with the surface of friction roller, the surface of friction roller is equipped with roll changing mechanism, and the side of rack is equipped with driving mechanism, by the cooperation of roll changing mechanism and driving mechanism, so that the present application can be in the state of not stopping to the film automatic cutting and automatic winding operation, and the cutting section of film will not appear oblique line, it is beneficial to subsequent processing of winding formed film, effectively improve the winding forming effect of film and overall winding efficiency.

Description

Technical Field

[0001] This invention relates to the field of winding machine technology, and more specifically to a film center winding machine. Background Technology

[0002] A film winding machine is an auxiliary device used in film production lines to wind the produced film onto a paper core to form a roll. Currently, some winding machines require manual cutting of the film after winding so that it can be transported away.

[0003] Chinese Patent Publication No. CN213894580U discloses an automatic cutting and winding machine, including a frame, a main shaft rubber roller mounted on the frame, the main shaft rubber roller being driven and connected to a first drive motor, a first swing frame, a cutting assembly, and a second swing frame mounted near the main shaft rubber roller on the frame, an air shaft placement part mounted on the first swing frame, the first swing frame being driven and connected to the second drive motor, an air shaft pushing part mounted on the second swing frame, an air shaft rolling slide corresponding to the air shaft pushing part mounted on the frame, the second swing frame being connected to the first swing drive cylinder, and a third swing frame mounted on one side of the second swing frame, the third swing frame being equipped with an air shaft holding part, the third swing frame being connected to the second swing drive cylinder. The invention has a simple structure, reasonable design, and good working stability, enabling non-stop winding and automatic cutting of wound materials, effectively improving the overall working efficiency of winding operations.

[0004] However, there is still a problem when using the above invention. Since the film is always moving, and the position of the cutting component relative to the main shaft rubber roller in the above invention has not changed, the cutting component will cut the film and make the cut surface of the film diagonal. This makes it difficult for the film within the diagonal range to be used in subsequent processing, resulting in poor winding effect.

[0005] Therefore, further improvements are necessary. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the prior art, the present invention provides a film center winding machine, which can effectively solve the problem that the cross-section of the film is oblique when it is cut, which is not conducive to subsequent processing of the film and results in poor film winding effect.

[0007] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a film center winding machine, including a frame and a friction roller rotatably connected to the frame. A power source for driving the friction roller to rotate is installed on the frame. A transmission assembly and a transfer assembly are respectively installed at the rear and front of the friction roller. A second air shaft for winding the film is installed in the transfer assembly, and the surface of the second air shaft abuts against the surface of the friction roller. A roll-changing mechanism for automatic roll changing is assembled on the surface of the friction roller. A drive mechanism is installed on the side of the frame. The drive mechanism includes a drive box fixed to the surface of the frame and a stabilizer rod rotatably connected to the frame. A spline shaft is rotatably connected in the drive box. A forward transmission assembly and a reverse transmission assembly for driving the roll-changing mechanism are respectively installed at both ends of the spline shaft. A drive cylinder for controlling the operation of the forward transmission assembly and the reverse transmission assembly is fixed in the drive box.

[0008] Preferably, the transfer assembly includes a transfer swing arm and a load-bearing swing arm rotatably connected to the frame, and a first cylinder and a second cylinder are hinged to the surface of the frame. The output ends of the first cylinder and the second cylinder are respectively hinged to the middle of the transfer swing arm and the load-bearing swing arm. The top of the transfer swing arm and the load-bearing swing arm are both provided with grooves for placing the second air shaft. The transmission assembly includes a steering roller, a tension roller and a guide roller rotatably connected to the frame, and the film passes through the steering roller, the tension roller, the guide roller, the friction roller and the winding mechanism in sequence and is wound around the second air shaft.

[0009] Preferably, the roll changing mechanism includes a fixed housing fixed to the frame surface at both ends of the friction roller. A drive wheel is installed inside the fixed housing, and a fixed cylinder is fixed to the surface of the frame. The output end of the fixed cylinder abuts against the surface of the drive wheel. A bearing seat is rotatably connected to the end of the friction roller. The bearing seat is fixedly connected to the drive wheel, and the drive wheel is coaxially connected to the friction roller. A roll changing frame is fixed to the surface of the bearing seat. A movable frame is hinged to the surface of the roll changing frame, and the included angle between the movable frame and the roll changing frame forms a U-shaped groove. A first air shaft for replacing the second air shaft is placed in the U-shaped groove, and the surface of the first air shaft abuts against the surface of the friction roller. A pulley is rotatably connected to the bottom of the movable frame, and the pulley abuts against the outer periphery of the fixed housing. The outer periphery of the fixed housing is the same as the outer periphery of the friction roller.

[0010] Preferably, a slide rail perpendicular to the film's forward direction is fixed between the roll changers at both ends of the friction roller. A guide rod for supporting the film's movement and a blade are slidably connected to the surface of the slide rail along its length. A rodless cylinder for driving the blade to reciprocate is installed inside the slide rail.

[0011] Preferably, a slave synchronizing pulley is coaxially connected to the surface of the spline shaft, the slave synchronizing pulley is meshed with the spline shaft, and the slave synchronizing pulley is rotatably connected to a master synchronizing pulley fixed at one end of the friction roller via a synchronizing belt.

[0012] Preferably, the forward transmission assembly includes splines fixed to both ends of the spline shaft, and the spline at one end of the spline shaft is coupled to the spline fixed to the end of the stabilizer bar. The spline at the other end of the spline shaft is connected to the reverse transmission assembly. Both ends of the stabilizer bar are fixed with synchronous pulleys, and the surfaces of the drive wheels at both ends of the friction roller are rotatably connected to the synchronous pulleys at both ends of the stabilizer bar via synchronous belts.

[0013] Preferably, the reverse transmission assembly includes a hollow rod rotatably connected to the drive box, with a spline fixed at one end and coupled to the end of the spline shaft. A first set of synchronizing pulleys is fixed on the surface of the hollow rod. A rotating shaft parallel to the axial direction of the spline shaft is rotatably connected inside the drive box. A second set of synchronizing pulleys and a second connecting gear are fixed at both ends of the rotating shaft, and the second set of synchronizing pulleys and the first set of synchronizing pulleys are rotatably connected via a synchronous belt. A first connecting gear is fixed at the end of the stabilizer rod, and the first connecting gear meshes with the second connecting gear.

[0014] Preferably, the output end of the drive cylinder is coaxially arranged with the spline shaft, and the output end of the drive cylinder passes through the interior of the hollow rod and is rotatably connected to the end of the spline shaft.

[0015] Preferably, the power source includes a drive motor and a geared motor. The output end of the drive motor is connected to the geared motor. The other end of the friction roller and the output end of the geared motor are both fixed with synchronous pulleys, and the other end of the friction roller and the output end of the geared motor are connected by a synchronous belt.

[0016] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects: by using the combination of the roll changing mechanism and the drive mechanism, the present invention can automatically cut and automatically rewind the film without stopping the machine, and the cut surface of the film will not be oblique, which is beneficial to the subsequent processing of the rewound film, effectively improving the film rewinding effect and the overall rewinding efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure from another perspective of the present invention; Figure 3 This is a front view of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of the cross-sectional structure along the AA direction; Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point C; Figure 6 For the present invention Figure 3 Schematic diagram of the cross-sectional structure in the middle BB direction; Figure 7 This is a partial structural diagram of the present invention; Figure 8 For the present invention Figure 7 Enlarged schematic diagram of the intermediate roll changing mechanism; Figure 9 For the present invention Figure 3 A schematic diagram of the cross-sectional structure of the drive box; Figure 10 For the present invention Figure 7 A schematic diagram of the structure when the second air shaft begins to wind up; Figure 11 For the present invention Figure 7 A schematic diagram of the structure of the second air expansion shaft after it has been wound up for a period of time; Figure 12 For the present invention Figure 7 A schematic diagram of the structure when the thin film on the surface of the second air shaft is cut; Figure 13 For the present invention Figure 7 A schematic diagram of the structure when the second air expansion shaft is transferred.

[0019] The labels in the diagram represent: 1. Frame; 2. Friction roller; 3. Roll changing mechanism; 30. First air shaft; 31. Fixed housing; 32. Bearing seat; 33. Drive wheel; 34. Fixed cylinder; 35. Roll changing frame; 36. Movable frame; 37. Slide rail; 371. Blade; 38. Rodless cylinder; 39. Guide rod; 4. Transmission assembly; 41. Directional roller; 42. Tensioning roller; 43. Guide roller; 5. Transfer assembly; 51. 511 Transfer swing arm; 521 First cylinder; 532 Bearing swing arm; 542 Second cylinder; 6. Second air shaft; 7. Drive motor; 8. Drive mechanism; 85. Splined shaft; 86. First connecting gear; 87. First auxiliary synchronous pulley; 88. Driven cylinder; 89. Driven synchronous pulley; 80. Rotating shaft; 91. Second auxiliary synchronous pulley; 92. Second connecting gear; 93. Stabilizer bar; 94. Hollow bar. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] The present invention will be further described below with reference to embodiments.

[0022] Example: Figure 1-13 As shown, a film center winding machine includes a frame 1, on which a friction roller 2 is rotatably connected. The friction roller 2 is driven at its end by the output end of a power source mounted on the frame 1, thereby demonstrating... Figure 1 From the observation perspective, a transmission assembly 4 for transferring the film is mounted behind the friction roller 2, and a transfer assembly 5 for transferring the film is mounted in front of the friction roller 2. A second air shaft 6 for winding the film is movably mounted on the transfer assembly 5, and the surface of the second air shaft 6 is in contact with the surface of the friction roller 2. When the winding machine starts working, the film passes downward through the surface of the friction roller 2 via the guidance of the transmission assembly 4, between the second air shaft 6 and the friction roller 2, and is wound around the surface of the second air shaft 6. As the friction roller 2 starts to rotate, the film will move under the friction force applied to it by the friction roller 2 and the second air shaft 6, and the moving speed is equal to the outer circumferential linear velocity of the friction roller 2. At the same time, the film will continuously wrap around the surface of the second air shaft 6 and follow the rotation of the second air shaft 6, ultimately achieving the purpose of winding the film.

[0023] As described above, when the outer diameter of the film wound on the surface of the second air shaft 6 continuously increases until it reaches the predetermined outer diameter, the film needs to be cut and removed. In the prior art, this step requires stopping the winding machine, manually cutting the film with a blade, and then removing the second air shaft 6 with the film wound on it. At the same time, a second air shaft 6 without film wound on it is then installed on the winding machine for subsequent film winding operations. This process can be called a roll changing operation. Obviously, this method of stopping the machine to change rolls makes it difficult to improve the overall film winding efficiency. Therefore, the present invention installs a roll changing mechanism 3 for automatic roll changing at the end of the friction roller 2, so that the winding machine can achieve automatic film cutting and automatic roll changing without stopping the machine, thereby improving the overall film winding efficiency.

[0024] Specifically, such as Figure 8As shown, the roll changing mechanism 3 includes a fixed housing 31 fixed to the surface of the frame 1 at both ends of the friction roller 2. A drive wheel 33 is installed inside the fixed housing 31. A bearing seat 32 is rotatably connected to the end of the friction roller 2. The bearing seat 32 is fixedly connected to the drive wheel 33, and the drive wheel 33 is coaxially connected to the friction roller 2. A roll changing frame 35 is fixed to the surface of the bearing seat 32. A movable frame 36 is hinged to the surface of the roll changing frame 35. A pulley is rotatably connected to the bottom of the movable frame 36, and the pulley abuts against the outer periphery of the fixed housing 31. The outer periphery of the fixed housing 31 is the same as the outer periphery of the friction roller 2. It is worth mentioning that... Figure 5 As shown, a U-shaped groove is formed between the roll changing frame 35 and the movable frame 36, and a first air shaft 30 for replacing the second air shaft 6 is placed in the U-shaped groove. The surface of the first air shaft 30 abuts against the surface of the friction roller 2. As can be seen from the above, when the drive wheel 33 rotates, it will drive the bearing seat 32 to rotate, thereby driving the roll changing frame 35 to rotate, so that the first air shaft 30 in the U-shaped groove moves accordingly, and the movement path of the first air shaft 30 is the same as the outer peripheral contour of the friction roller 2. When the roll changing frame 35 gradually rotates to the position of the second air shaft 6, the opening direction of the U-shaped groove will gradually be downward until the first air shaft 30 in the U-shaped groove can roll to the position of the second air shaft 6, thereby completing the purpose of roll changing.

[0025] Since the film needs to be cut before changing rolls, existing technologies employ two methods: one is manual cutting, which is inconvenient and labor-intensive; the other is automatic cutting with a cutter, but because the cutter's cutting direction is perpendicular to the film's forward direction, the film roll section on the second air shaft 6 will be oblique, which is detrimental to subsequent processing and results in poor winding. Therefore, to avoid this, this invention fixes a slide rail 37 perpendicular to the film's forward direction between the roll changers 35 at both ends of the friction roller 2. A blade 371 is slidably connected to the surface of the slide rail 37, and a rodless cylinder 38 for driving the blade 371 to reciprocate is installed inside the slide rail 37. Simultaneously, a guide rod 39 for supporting the film's forward movement is fixed along the length of the slide rail 37 to prevent the film from being scratched by the edge of the slide rail 37 during movement. It should be noted that... Figure 1 and 8As shown, the film's forward direction is as follows: it first passes between the first air shaft 30 and the friction roller 2 from behind the friction roller 2 and moves upward. Then, it moves downward and to the front side of the friction roller 2 via the guide rod 39, passing between the friction roller 2 and the second air shaft 6 and winding around the surface of the second air shaft 6. When the surface of the second air shaft 6 is about to be fully wrapped with film and needs to be transferred and removed, during this time period, the drive mechanism 8 drives the drive wheel 33 to rotate, making the drive wheel 33 rotate synchronously with the friction roller 2. At this time, since the linear velocity of the blade 371 following the rotation of the roll changer 35 is equal to the outer peripheral linear velocity of the friction roller 2, the blade 371 is relatively stationary with respect to the film during rotation. Therefore, under the action of the rodless cylinder 38, the blade 371 moves along the slide rail 37 and cuts the film, and the cut section is perpendicular to the forward direction of the film, thereby effectively improving the film winding efficiency. As a result, after the film is cut, the film belonging to the second air shaft 6 will be transferred away under the action of the transfer component 5. The other film will be wound onto the surface of the first air shaft 30 under the friction action of the first air shaft 30 and the friction roller 2. At this time, the drive wheel 33 is stopped rotating, and the film begins to be wound on the surface of the first air shaft 30. Through the operation of the transfer component 5, when the transfer arm 51 that originally placed the second air shaft 6 returns to the initial position, the drive wheel 33 continues to rotate under the action of the drive mechanism 8 until the first air shaft 30 in the U-shaped groove rolls to the original position where the second air shaft 6 was placed. At this time, the drive wheel 33 needs to rotate in the opposite direction until it drives the roll changer 35 back to the initial position to achieve the reset purpose, and then another first air shaft 30 is taken out and placed in the U-shaped groove. The above process is repeated, so as to finally complete the purpose of non-stop roll change and automatic film cutting.

[0026] Specifically, the transmission assembly 4 consists of a steering roller 41, a tensioning roller 42, and a guide roller 43, all of which are rotatably connected to the frame 1, such as... Figure 10 As shown, the film moves in the direction between the rollers. The transfer assembly 5 includes a transfer arm 51 rotatably connected to the frame 1 and a support arm 52. Both the transfer arm 51 and the support arm 52 have grooves on their tops for placing the second air shaft 6. The first air shaft 30 has the same structure as the second air shaft 6. The middle of the transfer arm 51 is hinged to the output end of the first cylinder 511, and the middle of the support arm 52 is hinged to the output end of the second cylinder 521. Both the first cylinders 511 and 522 are hinged to the surface of the frame 1. Figure 10-13 As shown, by controlling the extension and retraction of the output ends of the first cylinder 511 and the second cylinder 521, the relative approach and distance between the transfer arm 51 and the bearing arm 52 are controlled, thereby transferring the second air shaft 6 at the top of the transfer arm 51 to the top of the bearing arm 52. The second air shaft 6 at the top of the bearing arm 52 is then removed using external equipment, and the system is finally restored to its original position. Figure 10 The state shown.

[0027] To achieve forward and reverse rotation of the drive wheel 33 and meet the requirements of automatic roll changing and automatic film cutting, a drive mechanism 8 is installed on the surface of the frame 1. The drive mechanism 8 includes a drive box fixed to the surface of the frame 1 and a stabilizer bar 90 rotatably connected within the frame 1. Both ends of the stabilizer bar 90 are fixed with synchronous pulleys, which are rotatably connected to the drive wheels 33 located at both ends of the friction roller 2 via a synchronous belt. This ensures that the drive wheels 33 located at both ends of the friction roller 2 maintain stable synchronous rotation. Figure 2 and 9 As shown, a main synchronous pulley 85 is fixed at one end of the friction roller 2. A splined shaft 81 and a driven synchronous pulley 86 are rotatably connected inside the drive box. The driven synchronous pulley 86 and the main synchronous pulley 85 are rotatably connected by a synchronous belt. The inner ring of the driven synchronous pulley 86 is engaged with the surface of the splined shaft 81 and simultaneously slidably connected. That is, the splined shaft 81 can slide left and right along the axis of the driven synchronous pulley 86. The two ends of the splined shaft 81 are respectively equipped with a forward transmission component and a reverse transmission component for driving the winding mechanism 3.

[0028] Specifically, the forward transmission assembly includes splines fixed at both ends of a spline shaft 81, wherein the spline at one end of the spline shaft 81 can couple with the spline at the end of the stabilizer bar 90 when the spline shaft 81 moves. The reverse transmission assembly includes a hollow rod 91 rotatably connected to the drive housing, wherein the spline at the other end of the spline shaft 81 can couple with the spline at the end of the hollow rod 91 when the spline shaft 81 moves. A first set of synchronizer pulleys 83 is fixed to the surface of the hollow rod 91. A rotating shaft 87 parallel to the axial direction of the spline shaft 81 is rotatably connected inside the drive housing. A second set of synchronizer pulleys 88 and a second connecting gear 89 are fixed to both ends of the rotating shaft 87, respectively. The second set of synchronizer pulleys 88 and the first set of synchronizer pulleys 83 fixed to the surface of the hollow rod 91 are connected by a synchronous belt. The rotating connection allows the second connecting gear 89 to mesh with the first connecting gear 82 fixed at the end of the stabilizer bar 90, ultimately enabling the stabilizer bar 90 to rotate forward and backward. It should be noted that the power source on the frame 1 consists of a drive motor 7 and a reduction motor. Synchronous pulleys are fixed at one end of the friction roller 2 and at the output end of the reduction motor. The two synchronous pulleys are rotatably connected by a synchronous belt. Through the operation of the drive motor 7 and the reduction action of the reduction motor, the friction roller 2 is driven to rotate under the transmission of the synchronous belt, thus achieving the purpose of winding. At the same time, under the rotation action of the main synchronous pulley 85 at the other end of the friction roller 2, the power of the friction roller 2 is transmitted to the drive box and finally output to the stabilizer bar 90, so as to achieve the purpose of non-stop winding of the winding mechanism 3.

[0029] It is worth mentioning that, in order to control the left and right movement of the spline shaft 81 along the axial direction from the synchronous pulley 86, a drive cylinder 84 is fixed inside the drive housing. The output direction of the drive cylinder 84 is coaxially arranged with the spline shaft 81, and the output end of the drive cylinder 84 passes through the interior of the hollow rod 91 and is rotatably connected to the end of the spline shaft 81. Figure 9 As shown, by controlling the output end of the drive cylinder 84 to extend to the left, the spline shaft 81 is driven to slide to the left until it is coupled with the spline at the end of the stabilizer bar 90, thus achieving the forward rotation of the stabilizer bar 90, that is, the drive wheel 33 and the friction roller 2 rotate in the same direction and synchronously. By controlling the output end of the drive cylinder 84 to retract to the right, the spline shaft 81 is driven to slide to the right until it is coupled with the spline at the end of the hollow rod 91, thus achieving the reverse rotation of the stabilizer bar 90, that is, the drive wheel 33 and the friction roller 2 rotate in opposite directions. At this time, the purpose of resetting the roll changer 35 can be achieved.

[0030] It should be noted that the aforementioned drive wheel 33 is stopped from rotating by a fixed cylinder 34, such as... Figure 1-2 As shown, a fixing cylinder 34 is fixed on the surface of the frame 1, and the fixing cylinder 34 is respectively located at both ends of the friction roller 2. At the same time, the output end of the fixing cylinder 34 can abut against the surface of the drive wheel 33. That is, when the two ends of the spline shaft 81 are not in contact with the stabilizer bar 90 and the hollow bar 91, the output end of the fixing cylinder 34 is extended by controlling it to abut against the drive wheel 33, thereby preventing the drive wheel 33 from rotating due to inertia, thus improving the stability of the roll changing mechanism 3 during roll changing operation.

[0031] Working principle: such as Figure 10 As shown, after the end of the film to be wound passes through the steering roller 41, tension roller 42 and guide roller 43 in sequence, it passes between the friction roller 2 and the first air shaft 30, and then passes through the top of the guide rod 39 and between the friction roller 2 and the second air shaft 6. After that, a portion of the film is wound onto the surface of the second air shaft 6. At this time, the drive motor 7 is started, and the friction roller 2 starts to rotate in the forward direction. Under the action of the friction force generated when the second air shaft 6 and the friction roller 2 come into contact with each other, the second air shaft 6 is driven to rotate in the reverse direction, and the portion of the film wound on the surface of the second air shaft 6 rotates synchronously, thereby achieving the purpose of film winding. like Figure 9 , 11As shown in Figure 12, with the continuous rotation of the second air shaft 6, the radial dimension of the film on the surface of the second air shaft 6 gradually increases, forcing the end of the transfer swing arm 51 to begin moving away from the friction roller 2. When the radial dimension of the film matches the size during winding, under the synchronous rotation of the main synchronous wheel 85 and the friction roller 2, the synchronous belt drives the synchronous wheel 86 to rotate, and then, under the meshing action, drives the spline shaft 81 to rotate. At this time, the output end of the drive cylinder 84 extends to push the spline shaft 81 to move to the left until the end of the spline shaft 81 couples with the end of the stabilizer bar 90. Thus, under the rotation of the spline shaft 81, the stabilizer bar 90 rotates, causing the two ends of the stabilizer bar 90 to rotate simultaneously. The step wheel rotates and, under the transmission of the synchronous belt, drives the drive wheels 33 at both ends of the friction roller 2 to rotate, which in turn drives the roll changer 35 to rotate. At this time, the roll changer 35 rotates synchronously with the friction roller 2, so that the speed of the blade 371 when it moves is the same as the speed of the film when it advances on the surface of the friction roller 2. At the same time, the rodless cylinder 38 starts to work to push the blade 371 to quickly swipe across the film surface, thereby cutting the film. At this time, the film cross-section is perpendicular to its length direction, and the film on the surface of the second air shaft 6 achieves the purpose of winding. At the same time, the end face of the film to be wound is wound onto the surface of the first air shaft 30 under its inertia and friction between the friction roller 2 and the first air shaft 30. like Figure 13 As shown, after the second air shaft 6, wrapped with a thin film, moves from the end of the transfer arm 51 to the end of the bearing arm 52, it is moved away using an external device. At this time, under the action of the retraction of the output end of the first cylinder 511, the end of the transfer arm 51 rotates to the surface of the friction roller 2. Meanwhile, the first air shaft 30 slides from the U-shaped groove into the groove at the end of the transfer arm 51 under its own gravity. Considering that the first air shaft 30 has its own speed when it moves to the vicinity of the groove at the end of the transfer arm 51, therefore... This will increase the impact force when the first air shaft 30 hits the groove during the slide, causing the first air shaft 30 to be unstable during winding. At this time, the output end of the control drive cylinder 84 retracts, so that the end of the spline shaft 81 is disconnected from the stabilizer bar 90, so that the drive wheel 33 loses its power source. At the same time, the output end of the fixing cylinder 34 extends to fix the drive wheel 33 and prevent it from rotating due to inertia until the first air shaft 30 slides stably into the groove at the end of the transfer arm 51. At this time, the film wrapped on the surface of the first air shaft 30 abuts against the surface of the friction roller 2. Next, the output end of the drive cylinder 84 is retracted, causing the end of the splined shaft 81 to couple with the end of the hollow rod 91, thus rotating the hollow rod 91. This, in turn, causes the first synchronous pulley 83 to rotate, and under the transmission of the synchronous belt, the second synchronous pulley 88 rotates, which in turn causes the second connecting gear 89 to rotate. Under meshing, the first connecting gear 82 rotates in the opposite direction, causing the stabilizer bar 90 to rotate in the opposite direction, which in turn causes the drive wheel 33 to rotate in the opposite direction, causing the winding frame 35 to rotate in the opposite direction, i.e., opposite to the rotation direction of the friction roller 2, thus returning the winding frame 35 to its initial position. Figure 10 As shown, at this time, the output end of the control drive cylinder 84 extends, so that both ends of the spline shaft 81 are disconnected from the stabilizer 90 and the hollow rod 91. At the same time, the output end of the fixing cylinder 34 extends to fix the drive wheel 33, so that the roll changer 35 remains stable on the surface of the friction roller 2, and finally realizes automatic winding and automatic film cutting without stopping the winding machine.

[0032] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A film center winding machine, comprising a frame (1) and a friction roller (2) rotatably connected to the frame (1), wherein a power source for driving the friction roller (2) to rotate is mounted on the frame (1), characterized in that, A transmission assembly (4) and a transfer assembly (5) are respectively installed at the rear and front of the friction roller (2). A second air shaft (6) for winding the film is installed in the transfer assembly (5), and the surface of the second air shaft (6) abuts against the surface of the friction roller (2). A roll-changing mechanism (3) for automatic roll changing is assembled on the surface of the friction roller (2), and a drive mechanism (8) is installed on the side of the frame (1). The drive mechanism (8) includes a drive box fixed to the surface of the frame (1) and a stabilizer rod (90) rotatably connected in the frame (1). A spline shaft (81) is rotatably connected in the drive box. A forward transmission assembly and a reverse transmission assembly for driving the roll-changing mechanism (3) are respectively installed at both ends of the spline shaft (81), and a drive cylinder (84) for controlling the operation of the forward transmission assembly and the reverse transmission assembly is fixed in the drive box. The roll changing mechanism (3) includes a fixed housing (31) fixed to the surface of the frame (1) at both ends of the friction roller (2). A drive wheel (33) is installed inside the fixed housing (31), and a fixed cylinder (34) is fixed to the surface of the frame (1). The output end of the fixed cylinder (34) abuts against the surface of the drive wheel (33). A bearing seat (32) is rotatably connected to the end of the friction roller (2). The bearing seat (32) is fixedly connected to the drive wheel (33), and the drive wheel (33) is coaxially connected to the friction roller (2). A rewinding frame (35) is fixed to the surface of the friction roller (2). A movable frame (36) is hinged to the surface of the rewinding frame (35). The included angle between the movable frame (36) and the rewinding frame (35) is a U-shaped groove. A first air shaft (30) for replacing the second air shaft (6) is placed in the U-shaped groove. The surface of the first air shaft (30) abuts against the surface of the friction roller (2). A pulley is rotatably connected to the bottom of the movable frame (36). The pulley abuts against the outer periphery of the fixed shell (31). The outer periphery of the fixed shell (31) is the same as the outer periphery of the friction roller (2). The surface of the spline shaft (81) is coaxially connected to a slave synchronous pulley (86), the slave synchronous pulley (86) is meshed with the spline shaft (81), and the slave synchronous pulley (86) is rotatably connected to the master synchronous pulley (85) fixed at one end of the friction roller (2) via a synchronous belt; The forward transmission assembly includes splines fixed at both ends of the spline shaft (81), and the spline at one end of the spline shaft (81) is coupled to the spline fixed at the end of the stabilizer bar (90). The spline at the other end of the spline shaft (81) is connected to the reverse transmission assembly. Both ends of the stabilizer bar (90) are fixed with synchronous pulleys. The surfaces of the drive wheels (33) at both ends of the friction roller (2) are rotatably connected to the synchronous pulleys at both ends of the stabilizer bar (90) via synchronous belts. The reverse transmission assembly includes a hollow rod (91) rotatably connected to the drive box. The end of the hollow rod (91) is fixed with a spline and coupled to the end of the spline shaft (81). A first pair of synchronous pulleys (83) is fixed on the surface of the hollow rod (91). A rotating shaft (87) parallel to the axial direction of the spline shaft (81) is rotatably connected inside the drive box. A second pair of synchronous pulleys (88) and a second connecting gear (89) are fixed at both ends of the rotating shaft (87). The second pair of synchronous pulleys (88) and the first pair of synchronous pulleys (83) are rotatably connected by a synchronous belt. A first connecting gear (82) is fixed at the end of the stabilizer rod (90). The first connecting gear (82) and the second connecting gear (89) are meshed together. The output end of the drive cylinder (84) is coaxially arranged with the spline shaft (81), and the output end of the drive cylinder (84) passes through the interior of the hollow rod (91) and is rotatably connected to the end of the spline shaft (81). The transfer assembly (5) includes a transfer swing arm (51) and a bearing swing arm (52) rotatably connected to the frame (1), and a first cylinder (511) and a second cylinder (521) are hinged to the surface of the frame (1). The output ends of the first cylinder (511) and the second cylinder (521) are respectively hinged to the middle of the transfer swing arm (51) and the bearing swing arm (52). The top of the transfer swing arm (51) and the bearing swing arm (52) are both provided with grooves for placing the second air shaft (6). The transmission assembly (4) includes a steering roller (41), a tension roller (42) and a guide roller (43) rotatably connected to the frame (1). The film passes through the steering roller (41), the tension roller (42), the guide roller (43), the friction roller (2) and the winding mechanism (3) in sequence and is wrapped with the second air shaft (6). A slide rail (37) perpendicular to the film forward direction is fixed between the roll changer (35) at both ends of the friction roller (2). A guide rod (39) for supporting the film movement and a blade (371) are slidably connected to the surface of the slide rail (37) along its length direction. A rodless cylinder (38) for driving the blade (371) to reciprocate is installed inside the slide rail (37). When the output end of the drive cylinder (84) extends to the left, the spline shaft (81) is splined with the end of the stabilizer bar (90), the stabilizer bar (90) rotates in the forward direction, and the drive wheel (33) rotates in the same direction and synchronously with the friction roller (2); when the output end of the drive cylinder (84) retracts to the right, the spline shaft (81) is splined with the end of the hollow rod (91), the stabilizer bar (90) rotates in the reverse direction, and the drive wheel (33) rotates in the opposite direction to the friction roller (2), causing the roll changer (35) to reset; and in the During the period when the first air shaft (30) slides from the U-shaped groove into the end groove of the transfer arm (51) under its own gravity, the output end of the drive cylinder (84) retracts, causing the end of the spline shaft (81) to disconnect from the stabilizer bar (90), the drive wheel (33) loses its power source, and at the same time the output end of the fixing cylinder (34) extends to fix the drive wheel (33) to prevent it from rotating due to inertia, until the first air shaft (30) slides stably into the end groove of the transfer arm (51).

2. A film center winding machine according to claim 1, characterized in that, The power source includes a drive motor (7) and a geared motor. The output end of the drive motor (7) is connected to the geared motor. The other end of the friction roller (2) and the output end of the geared motor are both fixed with synchronous pulleys. The other end of the friction roller (2) and the output end of the geared motor are connected by a synchronous belt.

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