Winding mechanism of rewinding machine and rewinding machine

Abstract

The invention relates to a rewinding machine winding mechanism and a rewinding machine, and relates to the field of rewinding machines, the rewinding machine winding mechanism comprises a rack, two pressing discs, two driving discs, a driving assembly and a rotating assembly, the two pressing discs are coaxially arranged, each pressing disc is provided with a conical surface abutting against the inner edge of the end face of a paper tube, and a plurality of elastic pieces evenly distributed in the circumferential direction are fixed to the end face of each pressing disc; embedding teeth are arranged at the free ends of the elastic pieces, protruding blocks are fixed to the peripheral face of the driving disc and located between every two adjacent elastic pieces, a driving rod is coaxially fixed to the driving disc, and the driving rod and the pressing disc axially slide and are in rotation stopping fit; the driving assembly has two sections of driving, the pressure plate is driven to move towards the other pressure plate during one section of driving of the driving assembly, the driving rod and the driving plate are driven to axially move during second section of driving of the driving assembly, the outer edge of the end face of the driving plate abuts against the elastic piece to force the elastic piece to elastically deform, and the embedding teeth are embedded into the inner wall of the paper tube; the rotating assembly is used for driving the pressing disc to rotate. The winding stability can be improved.

Description

Technical Field

[0001] The present application relates to the field of rewinding machines, and in particular to a rewinding mechanism and a rewinding machine for a rewinding machine. Background Art

[0002] The existing rewinding mechanisms of rewinding machines include an air-expanding shaft type and a pressure plate type. For the air-expanding shaft type, the air-expanding shaft is detachably connected to the machine frame. The air-expanding shaft passes through the paper tube. After the air-expanding shaft is inflated, it is fixed to the paper tube. The air-expanding shaft has strong support and positioning for the paper tube and is suitable for rewinding finished paper with a large mass. However, the process of removing the finished paper from the air-expanding shaft is rather cumbersome, affecting the production efficiency.

[0003] The pressure plate type rewinding mechanism includes two support arms and two pressure plates. The pressure plate has a conical surface that abuts against the inner edge of the end face of the paper tube. The pressure plate is installed on the support arm, and the support arm can drive the pressure plate to move so as to clamp the paper tube between the two pressure plates or release the clamping of the paper tube. The advantage is that the displacement of the pressure plate can be mechanically controlled, enabling rapid positioning and release of the paper tube, facilitating loading and unloading, and having a relatively high production efficiency.

[0004] However, when the pressure plate is equipped with a drive source, the drive source can achieve tension control during rewinding, improving the rewinding effect. The torque of the drive source is mainly transmitted through the abutting friction force between the conical surface of the pressure plate and the inner edge of the end face of the paper tube, and the abutting friction force is mainly positively correlated with the clamping pressure and the clamping area of the pressure plate. Since the clamping area of the paper tube is extremely small, the greater the clamping pressure, the greater the torque upper limit of the paper tube. Especially for rewinding finished paper with a relatively large mass, a greater torque needs to be output to the paper tube, and the corresponding clamping pressure is also greater. However, a large clamping pressure easily causes the end face of the paper tube to be pressed and deformed, affecting the rewinding state of the rewound paper on the paper tube and also resulting in a decline in the appearance quality. Summary of the Invention

[0005] In order to improve the stability of rewinding large-mass finished paper, the present application provides a rewinding mechanism and a rewinding machine for a rewinding machine.

[0006] A rewinding mechanism for a rewinding machine provided by the present application adopts the following technical solutions: A rewinding mechanism for a rewinder, comprising a frame, two pressure plates, two driving discs, a driving assembly and a rotating assembly. The two pressure plates are coaxially arranged. The pressure plate has a conical surface that abuts against the inner edge of the end face of the paper tube. A plurality of elastic pieces are fixedly arranged on the end face of the pressure plate and are evenly arranged in a circumferential direction. The free end of the elastic piece is provided with an embedding tooth. A convex block is fixedly arranged on the outer peripheral surface of the driving disc, and the convex block is located between two adjacent elastic pieces. The driving disc is coaxially fixed with a driving rod, and the driving rod is axially slidable and non-rotatablely matched with the pressure plate. The driving assembly has two-stage driving. When the driving assembly drives in one stage, it will drive the pressure plate to move towards the other pressure plate. When the driving assembly drives in the second stage, it will drive the driving rod and the driving disc to move axially. The outer edge of the end face of the driving disc abuts against the elastic piece to force the elastic piece to elastically deform, so that the embedding tooth is embedded into the inner wall of the paper tube. The rotating assembly is used to drive the pressure plate to rotate.

[0007] By adopting the above technical solution, during the rewinding operation, first place the paper tube between the two pressure plates. The driving assembly performs one-stage driving to drive the pressure plate to move towards the other pressure plate. The conical surfaces of the two pressure plates simultaneously abut against the inner edge of the end face of the paper tube to realize the positioning and preliminary clamping and fixing of the paper tube, so as to ensure the coaxiality between the paper tube and the rotation axis of the pressure plate. Then the driving assembly performs two-stage driving to drive the driving rod and the driving disc to move axially. The outer edge of the end face of the driving disc abuts against the elastic piece to force the elastic piece to elastically deform radially outward along the paper tube, so that the embedding tooth of the elastic piece is embedded into the inner wall of the paper tube to realize the fixation between the elastic piece and the paper tube, thereby realizing the final clamping and fixing. Then wind the paper around the outside of the paper tube. The rotating assembly is used to drive the pressure plate to rotate. The torque of the pressure plate is transmitted to the paper tube through the elastic piece and the embedding tooth, thereby driving the paper tube to rotate to complete the rewinding.

[0008] After the rewinding is completed, the rotating assembly stops the rotation of the pressure plate. The driving assembly first retracts the driving rod and the driving disc. The driving disc releases the abutment against the elastic piece, and the elastic piece recovers its deformation, so that the embedding tooth disengages from the inner wall of the paper tube. Then the driving assembly drives the driving disc and the pressure plate to move away from the paper tube to release the positioning and clamping of the paper tube for easy feeding.

[0009] In summary, by setting the driving disk, the driving component and the elastic piece, and using the two-stage driving of the driving component, not only can the positioning and preliminary clamping and fixing of the paper tube be realized, but also the elastic piece can be forced to elastically deform radially outward along the paper tube, so that the embedding teeth of the elastic piece are embedded into the inner wall of the paper tube to realize the fixation of the elastic piece and the paper tube. Through the embedding fixation method, the fixing strength of the paper tube is improved, thereby improving the torque transmission effect of the pressing disk, further improving the stability of the winding of the large-quality finished paper, and at the same time reducing the degree of structural deformation of the paper tube and ensuring the winding state of the finished paper; and through the setting of the convex block, the convex block circumferentially limits the elastic piece, the torque of the pressing disk can be transmitted to the paper tube through the elastic piece, and the torque of the pressing disk can also be sequentially transmitted to the elastic piece and the paper tube through the driving rod, the driving disk and the convex block, thereby greatly improving the torque transmission effect of the elastic piece and further improving the stability of the winding of the large-quality finished paper.

[0010] Optionally, it further includes a supporting component. The supporting component includes two moving seats. The moving seats are slidably matched with the machine frame in a direction close to or away from the other moving seat. A plurality of triangular plates arranged side by side at intervals are fixed on the moving seats. The triangular plates of the two moving seats are arranged in a staggered manner, and the inclined surface of the triangular plate is set as the supporting surface.

[0011] By adopting the above technical solution, when placing the paper tube, the two moving seats move towards each other, and the supporting surfaces of the triangular plates of the two moving seats jointly support the outer peripheral surface of the paper tube to ensure that the axis of the paper tube is at a certain height position, that is, the axis of the paper tube is approximately coincident with the axis of the pressing disk. Then, the pressing disk positions and clamps the paper tube. After the positioning and clamping, the two moving seats move away from each other, so that the supporting surface of the triangular plate disengages from the outer peripheral surface of the paper tube to avoid the increase of friction when the paper tube rotates subsequently.

[0012] After the rewinding is completed, the two moving seats move towards each other, and the supporting surfaces of the triangular plates of the two moving seats jointly support the outer peripheral surface of the paper tube to reduce the interference effect of the self-weight of the paper tube on the retraction of the pressing disk and the elastic piece, that is, the pressing disk and the elastic piece can retract smoothly and disengage from the paper tube. Then, the two moving seats move away from each other, so that the supporting surface of the triangular plate disengages from the outer peripheral surface of the paper tube, and the paper tube loses support. Under the action of gravity, the paper tube can fall to the collection area, that is, the blanking efficiency is improved.

[0013] Optionally, the driving component includes a driving cylinder and a compression spring. The driving cylinder is installed on the machine frame. The end of the driving rod is coaxially rotatably matched with the end of the telescopic rod of the driving cylinder. The pressing disk is coaxially fixed with a driving cylinder. The rotating component is used to drive the driving cylinder to rotate. A first plate body is fixed on the driving rod, and a second plate body is fixed on the driving cylinder. The second plate body blocks the moving path of the first plate body along the direction away from the pressing disk. The compression spring is used to force the pressing disk to move relative to the driving rod in the direction towards the other pressing disk.

[0014] By adopting the above technical solution, when the driving cylinder makes a first-stage drive, the telescopic rod of the driving cylinder drives the driving rod to move forward a certain distance. The forward acting force of the driving rod is applied to the driving cylinder and the pressure plate through the compression spring to drive the pressure plate forward. The conical surfaces of the two pressure plates simultaneously abut against the inner edge of the end face of the paper tube, and at the same time, the compression spring is elastically compressed. The elastic force of the compression spring is applied to the pressure plate to increase the clamping force of the pressure plate on the paper tube. When the driving cylinder makes a second-stage drive, the telescopic rod of the driving cylinder drives the driving rod to move forward a further distance. At this time, the pressure plate cannot continue to move axially due to the limitation of the paper tube, and the driving rod moves forward a certain distance relative to the pressure plate, so that the outer edge of the end face of the driving plate abuts against the elastic sheet, forcing the elastic sheet to elastically deform outward in the radial direction of the paper tube, and enabling the embedding teeth of the elastic sheet to embed into the inner wall of the paper tube, so as to realize the fixation of the elastic sheet and the paper tube, thereby realizing the final clamping and fixation.

[0015] After the rewinding is completed, the rotating assembly stops the rotation of the pressure plate. The driving cylinder first retracts the driving rod and the driving plate. The driving plate releases the abutment against the elastic sheet, and the elastic sheet recovers its deformation, so that the embedding teeth disengage from the inner wall of the paper tube. Then the driving cylinder drives the driving rod and the driving plate to retract a certain distance. Since the first plate body moving with the driving rod abuts against the second plate body, it drives the second plate body, the driving cylinder and the pressure plate to retract, thereby releasing the positioning and clamping of the paper tube.

[0016] Optionally, the elastic sheet includes a fixed section, a first arc section, a first inclined section and a second inclined section which are integrally formed and connected in sequence. The fixed section is fixedly connected to the end face of the pressure plate. The shortest distance between the two symmetric first inclined sections gradually decreases along the axis away from the pressure plate, and the shortest distance between the two symmetric second inclined sections gradually increases along the axis away from the pressure plate. The end of the second inclined section is bent to form the embedding teeth. The inclined surface of the first inclined section is used for the outer edge of the end face of the driving plate to abut against. The convex block is located in the circumferential gap between the first inclined sections of two adjacent elastic sheets.

[0017] By adopting the above technical solution, when the driving cylinder makes a second-stage drive, the telescopic rod of the driving cylinder drives the driving rod to move forward a further distance. The outer edge of the end face of the driving plate abuts against the inclined surface of the first inclined section of the elastic sheet, forcing the first inclined section and the second inclined section of the elastic sheet to elastically deform outward in the radial direction of the paper tube, and enabling the embedding teeth of the elastic sheet to embed into the inner wall of the paper tube, so as to realize the fixation of the elastic sheet and the paper tube, thereby realizing the final clamping and fixation.

[0018] Optionally, a cylindrical convex rod is fixed to the convex block, and the first inclined section blocks the moving path of the convex rod as the driving rod retracts.

[0019] By adopting the above technical solution, when the driving cylinder drives the driving rod and the driving disc to retract, the driving disc releases the abutment against the elastic piece, and the elastic piece restores its deformation, so that the embedding teeth disengage from the inner wall of the paper tube. At the same time, the convex rod retracts with the driving disc, and the convex rod abuts against the first inclined section to drive the first inclined section to move radially inward along the paper tube, that is, to accelerate the reset of the first inclined section, thereby improving the speed and stability of the embedding teeth disengaging from the paper tube.

[0020] Optionally, the elastic piece includes a fixed section, a second arc section, a third inclined section, a third arc section, a fourth inclined section, and a horizontal section that are integrally formed and connected in sequence. The fixed section is fixedly connected to the end face of the pressure disc. The shortest distance between two symmetric third inclined sections gradually decreases along the axis away from the pressure disc. The inclined surface of the third inclined section is used for the outer edge of the end face of the driving disc to abut. The fourth inclined section is parallel to the third inclined section. The end of the horizontal section is bent to form the embedding teeth; the convex block is located in the circumferential gap between two adjacent third inclined sections of the elastic piece; a cylindrical convex rod is fixed to the convex block. The third inclined section blocks the moving path of the convex rod retracting with the driving rod, and the fourth inclined section blocks the moving path of the convex rod pushing forward with the driving rod.

[0021] By adopting the above technical solution, when the driving cylinder performs two-stage driving, the telescopic rod of the driving cylinder drives the driving rod to move forward a further distance. The outer edge of the end face of the driving disc abuts against the inclined surface of the third inclined section of the elastic piece, so as to force the third inclined section, the fourth inclined section, and the horizontal section to elastically deform radially outward along the paper tube. At the same time, the convex rod of the driving disc also abuts against the fourth inclined section of the elastic piece, so as to force the fourth inclined section and the horizontal section to elastically deform radially outward along the paper tube, that is, the moving paths of the horizontal section and the embedding teeth are affected by two driving directions. The two driving moving paths are superimposed, so that the moving path direction of the embedding teeth is approximately the radial direction of the paper tube, so as to increase the embedding depth and embedding stability of the embedding teeth, and further improve the torque transmission effect.

[0022] Optionally, a sliding cylinder is fixed to the frame. The sliding cylinder is coaxially arranged with the driving cylinder. A ring groove is formed in the end face of the driving cylinder away from the pressure disc. The sliding cylinder is axially slidably and rotationally engaged with the ring groove.

[0023] Optionally, the rotating assembly includes a motor fixed to the frame. A first gear is fixed to the output shaft of the motor. A second gear is coaxially sleeved and fixed outside the driving cylinder. The second gear meshes with the first gear, and the axial length of the second gear is greater than or equal to the axial displacement stroke of the driving cylinder.

[0024] By adopting the above technical solution, it is ensured that the second gear remains meshed with the first gear during the axial movement of the driving cylinder with the driving assembly, so as to facilitate the stable transmission of the torque of the motor.

[0025] A rewinder provided by the present application adopts the following technical solutions: A rewinder includes a rewinder winding mechanism.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: By providing a driving disk, a driving component and an elastic sheet, and using the two-stage driving of the driving component, not only can the positioning and preliminary clamping and fixing of the paper tube be realized, but also the elastic sheet can be forced to elastically deform radially outward along the paper tube, so that the embedding teeth of the elastic sheet are embedded into the inner wall of the paper tube to realize the fixation of the elastic sheet and the paper tube. Through the embedding method, the fixing strength of the paper tube is improved, thereby improving the torque transmission effect of the pressure plate, and further improving the stability of the winding of large-quality finished paper; and through the setting of the convex block, the convex block circumferentially limits the elastic sheet, and the torque of the pressure plate can be transmitted to the paper tube through the elastic sheet, and the torque of the pressure plate can also be transmitted to the elastic sheet and the paper tube through the driving rod, the driving disk and the convex block in sequence, thereby greatly improving the torque transmission effect of the elastic sheet, further improving the stability of the winding of large-quality finished paper, and at the same time reducing the structural deformation degree of the paper tube and ensuring the winding state of the finished paper; Through the abutment of the outer edge of the end face of the driving disk and the abutment of the convex rod of the driving disk, the movement paths of the horizontal section and the embedding teeth are affected by the driving in two inclined directions, and the two driving movement paths are superimposed, so that the movement path direction of the embedding teeth is approximately in the radial direction of the paper tube, so as to increase the embedding depth and embedding stability of the embedding teeth, and further improve the torque transmission effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of Embodiment 1.

[0028] Figure 2 is a schematic diagram of the supporting component of Embodiment 1.

[0029] Figure 3 is a sectional view of the overall structure of Embodiment 1.

[0030] Figure 4 is Figure 3 a partial enlarged view of part A in

[0031] Figure 5 is a partial sectional view of Embodiment 1 for showing the positional relationship between the driving disk and the elastic sheet.

[0032] Figure 6 is a schematic diagram of the pressure plate of Embodiment 1.

[0033] Figure 7 is a schematic diagram of the pressure plate and the driving disk of Embodiment 1.

[0034] Figure 8It is a schematic diagram showing the change process of the elastic deformation of the elastic piece in Embodiment 1.

[0035] Figure 9 It is a partial cross-sectional view showing the positional relationship between the driving disk and the elastic piece in Embodiment 2.

[0036] Figure 10 It is a schematic diagram of the pressure plate and the driving disk in Embodiment 2.

[0037] Figure 11 It is a partial cross-sectional view showing the positional relationship between the driving disk and the elastic piece in Embodiment 3.

[0038] Figure 12 It is a schematic diagram showing the change process of the elastic deformation of the elastic piece in Embodiment 3.

[0039] Explanation of reference numerals: 1, pressure plate; 2, driving disk; 3, elastic piece; 5, driving cylinder; 100, paper tube; 101, support plate; 102, connecting arm; 103, slide rail; 104, moving seat; 105, triangular plate; 106, sliding cylinder; 107, motor; 108, first gear; 109, second gear; 11, conical surface; 12, driving cylinder; 13, annular groove; 14, keyway; 140, perforation; 15, second plate body; 16, third plate body; 21, driving rod; 22, key block; 23, first plate body; 24, compression spring; 25, convex block; 26, convex rod; 30, first arc segment; 31, fixed segment; 32, first inclined segment; 33, second inclined segment; 34, embedding tooth; 35, second arc segment; 36, third inclined segment; 37, third arc segment; 38, fourth inclined segment; 39, horizontal segment. Detailed implementation manners

[0040] The following will Figure 1 - with reference to the Figure 12 drawings, a further detailed description of the present application will be given.

[0041] Embodiment 1. Embodiment 1 discloses a rewinder winding mechanism. As Figure 1 、 Figure 2 、 Figure 3 shown, the rewinder winding mechanism includes a frame, two pressure plates 1, two driving disks 2, a driving assembly, a rotating assembly, and a supporting assembly. The frame includes two support plates 101 and two connecting arms 102. The support plates 101 are vertically arranged, the two support plates 101 are oppositely arranged, the connecting arms 102 are horizontally arranged, and the two ends of the connecting arms 102 are respectively fixedly connected to the two support plates 101.

[0042] The supporting component initially supports the paper tube 100, making the axis of the paper tube 100 approximately coincide with the axis of the pressure plate 1, so as to facilitate the positioning and clamping of the paper tube 100 by the pressure plate 1. Secondly, after rewinding, the supporting component can also support the finished paper, so as to facilitate the release of the positioning and clamping by the pressure plate 1.

[0043] As Figure 2 shown, the supporting component includes two moving seats 104. The moving seats 104 are slidably matched with the frame along the direction of approaching or separating from the other moving seat 104. Specifically, a slide rail 103 is fixed between the two connecting arms 102. The slide rail 103 is horizontally perpendicular to the connecting arms 102. Both moving seats 104 are slidably matched with the slide rail 103. The movement of the moving seats 104 can be driven by manual pushing, or a linear driving structure such as a cylinder or an electric cylinder can be added to the frame as the power source for the moving seats 104.

[0044] A plurality of triangular plates 105 arranged side by side at intervals along the length direction of the connecting arm 102 are fixed on the side surface of the moving seat 104. The triangular plates 105 are vertically arranged. The triangular plates 105 of the two moving seats 104 are arranged in a staggered manner. The inclined surface of the triangular plate 105 is set as the supporting surface, and the supporting surface faces upward.

[0045] As Figure 3 、 Figure 4 shown, the two pressure plates 1 are coaxially arranged. The pressure plate 1 has a conical surface 11 that abuts against the inner edge of the end face of the paper tube 100. A driving cylinder 12 is coaxially fixed on the disk surface of the pressure plate 1 away from the other pressure plate 1. A sliding cylinder 106 is fixed on the support plate 101. The sliding cylinder 106 is coaxially arranged with the driving cylinder 12. An annular groove 13 is formed in the end face of the driving cylinder 12 away from the pressure plate 1. The sliding cylinder 106 is axially slidably and rotationally matched with the annular groove 13.

[0046] The rotating component is used to drive the pressure plate 1 to rotate. Specifically, Figure 1 、 Figure 4 the rotating component includes a motor 107 fixed on the support plate 101. A first gear 108 is fixed on the output shaft of the motor 107. A second gear 109 is coaxially sleeved and fixed on the outside of the driving cylinder 12. The second gear 109 meshes with the first gear 108, and the axial length of the second gear 109 is greater than or equal to the axial displacement stroke of the driving cylinder 12.

[0047] As Figure 5 、 Figure 6As shown, a plurality of elastic pieces 3 evenly arranged in a circle are fixed to the end face of the pressure plate 1. The elastic piece 3 includes a fixed section 31, a first arc section 30, a first inclined section 32, and a second inclined section 33 that are integrally formed and connected in sequence. The fixed section 31 is fixedly connected to the end face of the pressure plate 1 through bolts. The shortest distance between two first inclined sections 32 that are centrosymmetric about the axis of the pressure plate 1 gradually decreases along the axis away from the pressure plate 1. The shortest distance between two second inclined sections 33 that are centrosymmetric about the axis of the pressure plate 1 gradually increases along the axis away from the pressure plate 1. An embedding tooth 34 is formed by bending the end of the second inclined section 33.

[0048] As Figure 4 , Figure 6 shown, a driving rod 21 is coaxially fixed to the driving disk 2. The driving rod 21 is axially slidable and rotationally stopped with the pressure plate 1. Specifically, a through hole 140 penetrates through the center of the pressure plate 1. The driving rod 21 passes through the through hole 140. A keyway 14 is provided on the inner wall of the through hole 140. A key block 22 is fixed to the outer wall of the driving rod 21. The key block 22 is slidably engaged with the keyway 14, so that the torque of the pressure plate 1 can be transmitted to the driving rod 21 and the driving disk 2 through the cooperation of the key block 22 and the keyway 14, and the driving rod 21 can axially slide relative to the pressure plate 1.

[0049] As Figure 5 , Figure 7 shown, the outer edge of the end face of the driving disk 2 abuts against the inclined surface of the first inclined section 32. A convex block 25 is fixed to the outer peripheral surface of the driving disk 2. The convex block 25 is located in the circumferential gap between two adjacent first inclined sections 32 of the elastic piece 3.

[0050] The driving assembly has two-stage driving. When the driving assembly drives in one stage, it will drive the pressure plate 1 to move towards the direction of another pressure plate 1. When the driving assembly drives in the second stage, it will drive the driving rod 21 and the driving disk 2 to axially move, so that the outer edge of the end face of the driving disk 2 abuts against the elastic piece 3 to force the elastic piece 3 to elastically deform, and the embedding tooth 34 is embedded into the inner wall of the paper tube 100.

[0051] Specifically, as Figure 4 , Figure 8 shown, the driving assembly includes a driving cylinder 5 and a compression spring 24. The driving cylinder 5 is installed on the support plate 101. The end of the driving rod 21 is rotationally and coaxially engaged with the end of the telescopic rod of the driving cylinder 5. A ring-shaped first plate body 23 is fixed to the driving rod 21. A ring-shaped second plate body 15 and a ring-shaped third plate body 16 are fixed to the driving cylinder 12. The second plate body 15 and the third plate body 16 are respectively located on the axial two sides of the first plate body 23. Among them, the second plate body 15 blocks the path of the first plate body 23 moving in the direction away from the pressure plate 1. The two ends of the compression spring 24 respectively abut against the opposite surfaces of the first plate body 23 and the third plate body 16. The elastic force of the compression spring 24 is used to force the pressure plate 1 to move relative to the driving rod 21 in the direction towards another pressure plate 1.

[0052] The implementation principle of Embodiment 1 is as follows: When placing the paper tube 100, the two moving seats 104 move towards each other. The supporting surfaces of the triangular plates 105 of the two moving seats 104 jointly support the outer peripheral surface of the paper tube 100 to ensure that the axis of the paper tube 100 is at a certain height position, that is, to make the axis of the paper tube 100 approximately coincide with the axis of the pressure plate 1. Then, the driving cylinder 5 is driven for a period. The telescopic rod of the driving cylinder 5 drives the driving rod 21 to move forward a certain distance. The forward acting force of the driving rod 21 is applied to the driving cylinder 12 and the pressure plate 1 through the compression spring 24 to drive the pressure plate 1 to move forward. The tapered surfaces 11 of the two pressure plates 1 simultaneously abut against the inner edge of the end face of the paper tube 100 to achieve the positioning and preliminary clamping and fixing of the paper tube 100, so as to ensure the coaxiality of the rotation axis of the paper tube 100 and the pressure plate 1. At the same time, the compression spring 24 is elastically compressed, and the elastic force of the compression spring 24 is applied to the pressure plate 1 to increase the clamping force of the pressure plate 1 on the paper tube 100. Then, the driving cylinder 5 is driven for a second stage. The telescopic rod of the driving cylinder 5 drives the driving rod 21 to move forward another certain distance. At this time, due to the limitation of the paper tube 100, the pressure plate 1 cannot continue to move axially. The driving rod 21 and the driving disc 2 move forward a certain distance relative to the pressure plate 1. The outer edge of the end face of the driving disc 2 abuts against the inclined surface of the first inclined section 32 of the elastic piece 3 to force the first inclined section 32 and the second inclined section 33 of the elastic piece 3 to elastically deform outward along the radial direction of the paper tube 100 (see Figure 8 ), so that the embedding teeth 34 of the elastic piece 3 are embedded into the inner wall of the paper tube 100 to realize the fixation of the elastic piece 3 and the paper tube 100, thereby realizing the final clamping and fixing.

[0053] By means of embedding and fixing, the fixing strength of the paper tube 100 is improved, thereby improving the torque transmission effect of the pressure plate 1, and further improving the stability of the winding of large-quality finished paper. At the same time, the structural deformation degree of the paper tube 100 is also reduced and the shape stability of the finished paper is ensured.

[0054] After positioning and clamping, the two moving seats 104 move away from each other, so that the supporting surface of the triangular plate 105 disengages from the outer peripheral surface of the paper tube 100 to avoid the increase of friction when the paper tube 100 rotates subsequently.

[0055] Then, the paper is wound and fixed on the outside of the paper tube 100. The motor 107 drives the driving cylinder 12 and the pressure plate 1 to rotate through gear transmission. The torque of the pressure plate 1 is transmitted to the paper tube 100 through the elastic piece 3 and the embedding teeth 34, thereby driving the paper tube 100 to rotate. At the same time, since the convex block 25 circumferentially limits the elastic piece 3, the torque of the pressure plate 1 can be transmitted to the elastic piece 3 and the paper tube 100 successively through the driving rod 21, the driving disc 2 and the convex block 25, thereby greatly improving the torque transmission effect of the elastic piece 3 and further improving the stability of the winding of large-quality finished paper; the paper tube 100 rotates to complete the rewinding.

[0056] After the rewinding is completed, the rotating assembly stops the rotation of the pressing disc 1, and the two moving seats 104 move towards each other. The supporting surfaces of the triangular plates 105 of the two moving seats 104 jointly support the outer peripheral surface of the paper tube 100, so as to reduce the interference effect of the self-weight of the paper tube 100 on the backward movement of the pressing disc 1 and the elastic piece 3. The driving cylinder 5 first retracts the driving rod 21 and the driving disc 2, and the driving disc 2 releases the abutment against the elastic piece 3. The elastic piece 3 resumes deformation, so that the embedded teeth 34 disengage from the inner wall of the paper tube 100. Then the driving cylinder 5 drives the driving rod 21 and the driving disc 2 to retract a certain distance. Since the first plate body 23 moving with the driving rod 21 abuts against the second plate body 15, the second plate body 15, the driving cylinder 12 and the pressing disc 1 are driven to retract away from the paper tube 100, thereby releasing the positioning and clamping of the paper tube 100.

[0057] Then the two moving seats 104 move away from each other, so that the supporting surfaces of the triangular plates 105 disengage from the outer peripheral surface of the paper tube 100. The paper tube 100 loses support. Under the action of gravity, the paper tube 100 can fall to the collection area, that is, the blanking efficiency is improved.

[0058] Embodiment 1 also discloses a rewinder, including the rewinding mechanism of the above-mentioned rewinder.

[0059] Embodiment 2, the difference between Embodiment 2 and Embodiment 1 is that, as Figure 9 、 Figure 10 shown, a cylindrical convex rod 26 is fixed to the convex block 25, and the first inclined section 32 blocks the moving path of the convex rod 26 retracting with the driving rod 21.

[0060] When the driving cylinder 5 drives the driving rod 21 and the driving disc 2 to retract, the driving disc 2 releases the abutment against the elastic piece 3. The elastic piece 3 resumes deformation, so that the embedded teeth 34 disengage from the inner wall of the paper tube 100. At the same time, the convex rod 26 retracts with the driving disc 2, and the convex rod 26 abuts against the first inclined section 32 to drive the first inclined section 32 to move radially inward along the paper tube 100, that is, to accelerate the reset of the first inclined section 32, thereby improving the speed and stability of the embedded teeth 34 disengaging from the paper tube 100.

[0061] Embodiment 3, the difference between Embodiment 3 and Embodiment 1 is that, as Figure 11 、 Figure 12 shown, the elastic piece 3 includes a fixed section 31, a second arc section 35, a third inclined section 36, a third arc section 37, a fourth inclined section 38 and a horizontal section 39 which are integrally formed and connected in sequence. The fixed section 31 is fixedly connected to the end face of the pressing disc 1 by bolts. The shortest distance between the two third inclined sections 36 symmetrically centered on the axis of the pressing disc 1 gradually decreases along the axis away from the pressing disc 1. The inclined surface of the third inclined section 36 is used for the outer edge of the end face of the driving disc 2 to abut against. The fourth inclined section 38 is parallel to the third inclined section 36, and the end of the horizontal section 39 is bent to form the embedded teeth 34.

[0062] The bump 25 is located in the circumferential gap between the third inclined segments 36 of two adjacent elastic pieces 3; a cylindrical convex rod 26 is fixed to the bump 25, the third inclined segment 36 blocks the moving path of the convex rod 26 when it retracts with the driving rod 21, and the fourth inclined segment 38 blocks the moving path of the convex rod 26 when it advances with the driving rod 21.

[0063] In the initial state, the fourth inclined segment 38 is parallel to the third inclined segment 36. When the driving cylinder 5 performs two-stage driving, the telescopic rod of the driving cylinder 5 drives the driving rod 21 to advance a further distance, and the outer edge of the end face of the driving disc 2 abuts against the inclined surface of the third inclined segment 36 of the elastic piece 3, so as to force the third inclined segment 36, the fourth inclined segment 38 and the horizontal segment 39 to elastically deform radially outward along the paper tube 100. At the same time, the convex rod 26 of the driving disc 2 also abuts against the fourth inclined segment 38 of the elastic piece 3, so as to force the fourth inclined segment 38 and the horizontal segment 39 to elastically deform radially outward along the paper tube 100 (at this time, the fourth inclined segment 38 is not parallel to the third inclined segment 36), that is, the moving paths of the horizontal segment 39 and the embedding teeth 34 are affected by two driving directions, and the two driving moving paths are superimposed, so that the moving path direction of the embedding teeth 34 is approximately the radial direction of the paper tube 100, so as to increase the embedding depth and the embedding stability of the embedding teeth 34, and further improve the torque transmission effect.

[0064] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A rewinder winding mechanism, characterized in that: It includes a frame, two pressure plates (1), two drive disks (2), a drive assembly, and a rotating assembly. The two pressure plates (1) are coaxially arranged. The pressure plate (1) has a conical surface (11) that abuts against the inner edge of the end face of the paper tube (100). A plurality of elastic pieces (3) evenly arranged in a circle are fixed to the end face of the pressure plate (1). The free end of the elastic piece (3) is provided with an embedding tooth (34). A convex block (25) is fixed to the outer peripheral surface of the drive disk (2). The convex block (25) is located between two adjacent elastic pieces (3). The drive disk (2) is coaxially fixed with a drive rod (21). The drive rod (21) is axially slidable and non-rotatablely engaged with the pressure plate (1). The drive assembly has two-stage driving. When the drive assembly drives in one stage, it will drive the pressure plate (1) to move towards the other pressure plate (1). When the drive assembly drives in the second stage, it will drive the drive rod (21) and the drive disk (2) to move axially. The outer edge of the end face of the drive disk (2) abuts against the elastic piece (3) to force the elastic piece (3) to elastically deform, so that the embedding tooth (34) is embedded into the inner wall of the paper tube (100). The rotating assembly is used to drive the pressure plate (1) to rotate.

2. The rewinding mechanism of the rewinder according to claim 1, characterized in that: It further includes a supporting assembly. The supporting assembly includes two moving seats (104). The moving seats (104) are slidably engaged with the frame in a direction close to or away from the other moving seat (104). A plurality of triangular plates (105) arranged side by side at intervals are fixed to the moving seats (104). The triangular plates (105) of the two moving seats (104) are arranged in a staggered manner, and the inclined surface of the triangular plate (105) is set as the supporting surface.

3. The rewinding mechanism of the rewinder according to claim 1 or 2, characterized in that: The drive assembly includes a drive cylinder (5) and a compression spring (24). The drive cylinder (5) is installed on the frame. The end of the drive rod (21) is coaxially and rotatably engaged with the end of the telescopic rod of the drive cylinder (5). The pressure plate (1) is coaxially fixed with a drive cylinder (12). The rotating assembly is used to drive the drive cylinder (12) to rotate. A first plate body (23) is fixed to the drive rod (21). A second plate body (15) is fixed to the drive cylinder (12). The second plate body (15) blocks the path of the first plate body (23) moving away from the pressure plate (1). The compression spring (24) is used to force the pressure plate (1) to move relative to the drive rod (21) in a direction towards the other pressure plate (1).

4. The rewinding mechanism of the rewinder according to claim 3, characterized in that: The elastic piece (3) includes a fixed section (31), a first arc section (30), a first inclined section (32), and a second inclined section (33) that are integrally formed and connected in sequence. The fixed section (31) is fixedly connected to the end face of the pressure plate (1). The shortest distance between two symmetric first inclined sections (32) gradually decreases along the axis away from the pressure plate (1). The shortest distance between two symmetric second inclined sections (33) gradually increases along the axis away from the pressure plate (1). The end of the second inclined section (33) is bent to form the embedding tooth (34). The inclined surface of the first inclined section (32) is used for the outer edge of the end face of the drive disk (2) to abut against. The convex block (25) is located in the circumferential gap between the first inclined sections (32) of two adjacent elastic pieces (3).

5. The rewinder winding mechanism according to claim 4, characterized in that: The bump (25) is fixed with a cylindrical convex rod (26), and the first inclined section (32) blocks the moving path of the convex rod (26) as it retracts with the driving rod (21).

6. The rewinder winding mechanism according to claim 3, characterized in that: The elastic sheet (3) includes a fixed section (31), a second bent arc section (35), a third inclined section (36), a third bent arc section (37), a fourth inclined section (38), and a horizontal section (39) that are integrally formed and connected in sequence. The fixed section (31) is fixedly connected to the end face of the pressure plate (1). The shortest distance between two symmetric third inclined sections (36) gradually decreases along the axis away from the pressure plate (1). The inclined surface of the third inclined section (36) is used for the outer edge of the end face of the driving disc (2) to abut against. The fourth inclined section (38) is parallel to the third inclined section (36). The end of the horizontal section (39) is bent and formed with the embedding teeth (34). The bump (25) is located in the circumferential gap between the third inclined sections (36) of two adjacent elastic sheets (3). The bump (25) is fixed with a cylindrical convex rod (26). The third inclined section (36) blocks the moving path of the convex rod (26) as it retracts with the driving rod (21), and the fourth inclined section (38) blocks the moving path of the convex rod (26) as it is pushed forward with the driving rod (21).

7. The rewinder winding mechanism according to claim 3, characterized in that: The frame is fixed with a sliding cylinder (106). The sliding cylinder (106) is coaxially arranged with the driving cylinder (12). An annular groove (13) is formed in the end face of the driving cylinder (12) away from the pressure plate (1). The sliding cylinder (106) is in axial sliding fit with the annular groove (13) and is in rotational fit with the annular groove (13).

8. The rewinding mechanism of the rewinder according to claim 3, characterized in that: The rotating assembly includes a motor (107) fixed to the frame. The output shaft of the motor (107) is fixed with a first gear (108). A second gear (109) is coaxially sleeved and fixed on the outside of the driving cylinder (12). The second gear (109) meshes with the first gear (108), and the axial length of the second gear (109) is greater than or equal to the axial displacement stroke of the driving cylinder (12).

9. A rewinder, characterized in that: It includes the rewinder winding mechanism described in Claim 1.

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