Rewinding machine capable of limiting end part of paper

Abstract

The utility model discloses a rewinding machine capable of limiting the end part of paper, which comprises a rewinding machine body and a plurality of sets of limiting mechanisms, the plurality of sets of limiting mechanisms are sleeved on the same support shaft, and each set of limiting mechanism comprises two symmetrically arranged limiting wheels; bottom rollers are arranged below the multiple sets of limiting mechanisms, the bottom rollers are arranged below the supporting shaft in parallel, and the limiting wheels and the bottom rollers are distributed on the upper side and the lower side of the paper. The two ends of the bottom roller and the two ends of the supporting shaft are each provided with a support and a transmission mechanism, the ends of the bottom roller and the ends of the supporting shaft are sleeved with the transmission mechanisms, and the transmission mechanisms are installed on the supports. The limiting mechanism is arranged, the bottom roller is arranged below the limiting mechanism, meanwhile, the bottom roller and the limiting mechanism are distributed on the two sides of the paper, and the bottom roller and the limiting mechanism are both in contact with the paper, so that movement of the end of the paper can be limited under the cooperation of the limiting mechanism and the bottom roller, and convenience is provided for regular rolling of the paper.

Description

Technical Field

[0001] This utility model relates to the field of paper rewinding technology, specifically a rewinding machine that can restrict the ends of paper. Background Technology

[0002] On a paper production line, the paper exiting the paper machine is typically a continuous, large web, and may exhibit uneven tension, irregular edges, and other defects. A rewinder can rewind this raw paper into rolls with appropriate tension, according to the requirements of subsequent processing or use, resulting in a tighter, smoother, and more regular winding. For example, it can cut wide-width raw paper into multiple narrow-width rolls, facilitating subsequent printing, packaging, and other processing steps.

[0003] In addition, based on customer needs, large rolls of paper can be slit into smaller rolls of different widths and diameters to meet diverse market demands. For example, in the packaging industry, different product packaging may require paper of different widths. Rewinders can slit large rolls of packaging paper into the corresponding widths, and can also adjust the diameter and number of winding layers of the paper rolls as needed.

[0004] As mentioned above, the main function of a rewinder is to wind paper. Ensuring neat winding of the paper ends during rewinding is a key factor in guaranteeing the quality of the paper roll. However, existing rewinders have many shortcomings in this regard and struggle to meet increasingly stringent production demands.

[0005] On the one hand, traditional rewinders lack effective measures to restrict the paper ends. During the rewinding process, due to factors such as the paper's own flexibility, tension fluctuations, and vibrations during equipment operation, the paper is prone to lateral movement, resulting in uneven paper ends. Such uneven paper rolls not only have poor appearance quality but also easily lead to problems like loosening and edge collapse during subsequent handling and storage, causing significant inconvenience to production and use. For example, in the printing industry, uneven paper rolls affect the paper feeding accuracy of printing equipment, causing printed patterns to shift, reducing the quality of printed products and production efficiency.

[0006] On the other hand, some rewinders have movable limiting plates on both sides of the rewinding shaft. These limiting plates can be adjusted according to the width of the paper. The distance between the limiting plates is changed by an adjusting device (such as a combination of a lead screw, nut, and drive motor) to make them fit precisely against the two edges of the paper. During rewinding, the limiting plates prevent lateral movement of the paper, ensuring that the ends of the paper are neatly wound onto the rewinding shaft. However, if the paper tension is uneven during rewinding, it may cause wrinkles or deformation near the limiting plates. For example, when the local tension of the paper is too high, it may cause bulges or wrinkles to appear at the edges of the paper that contact the limiting plates, affecting the paper quality. Utility Model Content

[0007] The purpose of this invention is to provide a rewinder that can restrict the ends of paper, thereby improving the problem that rewinders lack paper end restricting structures or whose restricting structures need improvement.

[0008] This utility model is implemented as follows: A rewinding machine capable of restricting the ends of paper includes a rewinding machine body and a restricting mechanism. Multiple sets of restricting mechanisms are provided and are sleeved on the same support shaft. Each set of restricting mechanisms includes two symmetrically arranged restricting wheels. A bottom roller is provided below the multiple sets of restricting mechanisms and is arranged parallel to the support shaft. The restricting wheels and the bottom roller are distributed on the upper and lower sides of the paper. A bracket and a transmission mechanism are provided at both ends of the bottom roller and the support shaft. The transmission mechanism is sleeved on the ends of the bottom roller and the support shaft and is mounted on the bracket.

[0009] Preferably, the two limiting wheels are arranged in a figure-eight shape, and a tube is fixedly installed in the middle of each limiting wheel. A first limiting bolt is threaded through the end of the tube. The two tubes are sleeved on the same sleeve, and the end of the first limiting bolt extends into the limiting groove of the sleeve.

[0010] Preferably, a plurality of threaded grooves are provided on the support shaft, the plurality of threaded grooves are distributed along the length direction of the support shaft, the sleeve is sleeved on the support shaft, and a second limiting bolt is provided through the middle of the sleeve, the end of the second limiting bolt being threaded into the threaded groove.

[0011] Preferably, the transmission mechanism includes a first bearing seat and a second bearing seat, which are respectively sleeved on the ends of the support shaft and the bottom roller; a first gear is also sleeved on the end of the bottom roller, a second gear is meshed and connected to the side of the first gear, a second wheel body is coaxially arranged on the side of the second gear, and a first wheel body is sleeved on the end of the support shaft, with the first wheel body and the second wheel body connected.

[0012] Preferably, a snap-fit ​​post is fixedly provided on the side wall of the second bearing housing, and an end plate is provided at the end of the central shaft of the second gear and the second wheel body. The side wall of the end plate is provided with a snap-fit ​​groove, and the end plate is fitted to the side wall of the second bearing housing. At the same time, the snap-fit ​​post passes through the snap-fit ​​groove.

[0013] Preferably, a driven wheel is provided at one end of the support shaft, and the driven wheel is connected to the power wheel of the rewinder body via a chain or belt.

[0014] Preferably, the support includes a base plate, a base frame, a first fixing plate, and a top pipe. The base frame and the base plate are both configured as L-shaped structures. A vertical pipe and a threaded rod are provided on the base plate. The vertical pipe and the threaded rod are provided through the bottom of the base frame, and two nuts threaded onto the threaded rod are distributed on the upper and lower sides of the base frame. The first fixing plate is installed on the top of the base frame, and the top pipe is installed on the top of the first fixing plate.

[0015] Preferably, a pull-down mechanism is provided on the side of the first fixed plate. The pull-down mechanism includes a second fixed plate and a spring. The second fixed plate is arranged parallel to the top of the first fixed plate, and a first sleeve frame is fixedly provided on the side of the second fixed plate. A second sleeve frame is provided below the first sleeve frame. Both the first sleeve frame and the second sleeve frame are sleeved on the top pipe. End plates are provided on the sides of both the first sleeve frame and the second sleeve frame. The spring is arranged between the two end plates and is in an extended state.

[0016] Preferably, the first bearing housing and the second bearing housing are respectively installed on the side of the second fixing plate and the first fixing plate that are close to each other.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model is equipped with a limiting mechanism, and a bottom roller is provided below the limiting mechanism. The bottom roller and the limiting mechanism are distributed on both sides of the paper, and both the bottom roller and the limiting mechanism are in contact with the paper. The movement of the paper end can be restricted by the cooperation of the limiting mechanism and the bottom roller, which facilitates the neat winding of the paper.

[0019] 2. Each limiting mechanism in this utility model includes two symmetrical limiting wheels, which are arranged in a figure-eight pattern. The rolling of the limiting wheels can apply an outward force to the edge of the paper, forcing the paper to spread out and thus making the paper neatly rolled up. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a structural schematic diagram of the limiting mechanism, bottom roller, and support of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the support shaft of this utility model;

[0023] Figure 4 This is a schematic diagram of the limiting mechanism of this utility model;

[0024] Figure 5 This is a structural schematic diagram of the bracket, transmission mechanism, and pull-down mechanism of this utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the bracket of this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the pull-down mechanism of this utility model;

[0027] Figure 8 This is a schematic diagram of the end plate and spring of this utility model;

[0028] Figure 9 This is a schematic diagram of the transmission mechanism of this utility model;

[0029] Figure 10 This is a schematic diagram of the end plate and the second bearing seat of this utility model.

[0030] In the diagram: 1. Rewinder body; 2. Restriction mechanism; 21. Sleeve; 22. Restriction groove; 23. Restriction wheel; 24. First limit bolt; 25. Second limit bolt; 3. Support shaft; 31. Driven wheel; 32. Threaded groove; 4. Bottom roller; 5. Bracket; 51. Base plate; 52. Vertical tube; 53. Threaded rod; 54. Base frame; 55. Threaded hole; 56. Top tube; 57. First fixed plate; 6. Transmission mechanism; 61. First bearing seat; 62. Second bearing seat; 63. End plate; 64. First wheel body; 65. First gear; 66. Second gear; 67. Clip groove; 68. Clip post; 7. Pull-down mechanism; 71. Second fixed plate; 72. First sleeve frame; 73. Spring; 74. End plate; 75. Second sleeve frame; 76. Blocking post; 77. Spiral groove. Detailed Implementation

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0033] In order to restrict the ends of the paper during the rewinding process of the rewinder and avoid paper winding disorder caused by uneven stress, this embodiment provides a structure for restricting the ends of the paper. The structure is installed on the rewinder, and the paper passes through the structure, and the movement of the ends of the paper is controlled by the structure.

[0034] like Figure 1As shown, before introducing the structure that restricts the movement of the paper end, a brief introduction to the publicly disclosed rewinder (hereinafter referred to as rewinder body 1) is given here. It includes an unwinding mechanism, a paper feeding mechanism, a rewinding mechanism, a cutting mechanism, and a control system. The unwinding mechanism includes a paper holder and an unwinding tension control system; the paper holder is used to hold the paper roll to be rewound and usually has an adjustable support structure to accommodate paper rolls of different widths and diameters; the unwinding tension control system detects the paper tension in real time through sensors and automatically adjusts the unwinding speed according to the set value to ensure that the paper maintains a constant tension during the unwinding process. The paper feeding mechanism includes a paper feeding roller group and a tension adjustment device; the paper feeding roller group consists of multiple paper feeding rollers, which transport the paper from the unwinding mechanism to the rewinding mechanism through the rotation of the rollers; the tension adjustment device, in addition to controlling the unwinding tension, also needs to further adjust the paper tension during the paper feeding process. The tension adjustment device can use cylinders, springs, or electric actuators to make precise adjustments according to the characteristics of the paper and the rewinding requirements. The rewinding mechanism includes a rewinding shaft and a drive unit. The drive unit provides power to the rewinding shaft, enabling it to rotate at a set speed and direction. The drive unit typically uses a combination of a motor and a reducer, transmitting power to the rewinding shaft via a transmission system (such as a belt, chain, or gears). The cutting mechanism includes a cutter and a cutter drive system. The control system includes an electrical control cabinet and an operation panel. The electrical control cabinet integrates various electrical components and controllers, such as a PLC (Programmable Logic Controller), frequency converter, and relays, used to coordinate the operation of all components of the rewinding machine.

[0035] like Figure 1 As shown, the structure used to limit the position of the paper ends is located upstream of the rewinding shaft. That is, the paper first passes through this structure and is then wound onto the rewinding shaft. The paper is then wound in a regular manner through the operation of this structure.

[0036] like Figure 2As shown, specifically, the structure for restricting the paper end includes a restricting mechanism 2, a support shaft 3, a bottom roller 4, a bracket 5, and a transmission mechanism 6. Multiple sets of restricting mechanisms 2 are provided, all mounted on the support shaft 3, thus controlling the synchronous rotation of multiple sets of restricting mechanisms 2 under the action of the support shaft 3. The support shaft 3 is arranged parallel above the bottom roller 4, and both ends of the support shaft 3 and the bottom roller 4 are fitted with transmission mechanisms 6. The transmission mechanisms 6 are mounted on the bracket 5, which is mounted on the rewinder body 1, thus stably supporting the support shaft 3 and the bottom roller 4, and enabling the support shaft 3 and the bottom roller 4 to rotate in opposite directions under the action of the transmission mechanism 6, so as to restrict the paper end when the paper passes through the space formed by the support shaft 3 and the bottom roller 4. In order to control the rotation of the support shaft 3 and the bottom roller 4, a driven wheel 31 is provided at the end of the support shaft 3. In addition, a power wheel is provided on a certain power roller of the rewinder body 1. The driven wheel 31 is connected to the power wheel of the rewinder body 1 through a chain or belt, so that when the roller of the rewinder body 1 rotates, it drives the support shaft 3 and the bottom roller 4 to rotate.

[0037] like Figure 6 As shown, to stably install the support shaft 3 and the bottom roller 4, the bracket 5 includes a base plate 51, a base frame 54, a first fixing plate 57, and a top tube 56. Both the base frame 54 and the base plate 51 are L-shaped structures. The base plate 51 is bolted to the frame of the rewinding machine body 1. A vertical tube 52 and a threaded rod 53 are fixedly installed on the top of the base plate 51, and the vertical tube 52 and threaded rod 53 penetrate the bottom of the base frame 54. To ensure the base frame 54 is stably positioned relative to the base plate 51, two nuts are threaded onto the threaded rod 53, distributed on the upper and lower sides of the base frame 54. The two nuts allow the base frame 54 to be stably installed on the base plate 51 and provide support for adjusting the position of the base frame 54 relative to the base plate 51 as needed. The first fixing plate 57 is installed on the top of the base frame 54, and the top tube 56 is installed on the top of the first fixing plate 57.

[0038] like Figure 5-7 As shown, a second fixing plate 71 is provided above the first fixing plate 57. A first sleeve frame 72 is fixedly provided on the side of the second fixing plate 71. The first sleeve frame 72 is sleeved on the jacking pipe 56, realizing the movable connection between the first sleeve frame 72 and the jacking pipe 56. A second sleeve frame 75 is also sleeved on the jacking pipe 56. A bolt is provided through the side wall of the second sleeve frame 75. The end of the bolt is threaded into a threaded hole 55 of the jacking pipe 56. Therefore, the second sleeve frame 75 is stationary relative to the jacking pipe 56.

[0039] like Figure 5 , Figure 7As shown, end plates 74 are provided on the sides of both the first frame 72 and the second frame 75. A spring 73 is disposed between the two end plates 74 and is in an extended state. Therefore, the second fixed plate 71 can be pulled up and down under the action of the spring 73. In addition, a first bearing seat 61 and a second bearing seat 62 are respectively provided on the side of the second fixed plate 71 and the first fixed plate 57 that are close to each other, and the ends of the support shaft 3 and the bottom roller 4 are respectively inserted through the first bearing seat 61 and the second bearing seat 62. Under the condition that the support shaft 3 and the bottom roller 4 are stably installed, the support shaft 3 can be moved relative to the bottom roller 4, and the movement of the paper end can be restricted by the cooperation of the limiting mechanism 2 and the bottom roller 4. The spring 73, the first frame 72 and the second frame 75, etc. constitute the pull-down mechanism 7.

[0040] like Figure 8 As shown, to stably mount the spring 73 between the two end plates 74, a through hole is provided on the end plate 74, and a helical groove 77 is provided on the side wall of the through hole. The end of the spring 73 extends into the helical groove 77. Additionally, a blocking post 76 is bolted to the through hole, extending into the through hole and contacting the spring 73, thereby restricting the stable mounting of the spring 73. Alternatively, welding technology can be used to weld the end of the spring 73 to the end plate 74.

[0041] like Figure 9 As shown, in order to control the opposite rotation of the support shaft 3 and the bottom roller 4 through the operation of the transmission mechanism 6, the transmission mechanism 6 includes a first bearing seat 61, a second bearing seat 62, a first gear 65, a second gear 66, a second wheel body, and a first wheel body 64. As can be seen from the above, the first bearing seat 61 and the second bearing seat 62 are respectively mounted on the second fixed plate 71 and the first fixed plate 57. The first gear 65 is sleeved on the end of the bottom roller 4, and the second gear 66 is meshed and connected to the side of the first gear 65. A second wheel body is coaxially arranged on the side of the second gear 66, and the first wheel body 64 is sleeved on the end of the support shaft 3. The first wheel body 64 and the second wheel body are connected by a belt or chain. With the cooperation of the first gear 65 and the second gear 66, the second wheel body can rotate in the opposite direction to the bottom roller 4, thereby controlling the opposite rotation of the support shaft 3 relative to the bottom roller 4 through the cooperation of the second wheel body and the first wheel body 64.

[0042] like Figure 10As shown, in order to adjust the tension of the chain and belt after the support shaft 3 is raised or lowered, a locking post 68 is fixedly installed on the side wall of the second bearing seat 62. An end plate 63 is provided at the end of the central shaft of the second gear 66 and the second wheel body. The side wall of the end plate 63 has a locking groove 67 with a central angle greater than 180°. The end plate 63 is fitted against the side wall of the second bearing seat 62, and the locking post 68 penetrates the locking groove 67. Therefore, with the cooperation of the locking post 68 and the locking groove 67, the end plate 63 is stably and adjustablely installed on the bearing seat, facilitating the adjustment of the position of the second gear 66 and the second wheel body. To ensure stable installation of the end plate 63 relative to the bearing seat, a bolt is threaded through the side wall of the locking groove 67. The end of the bolt presses against the locking post 68, thereby controlling the stable placement of the end plate 63 relative to the bearing seat under the action of the bolt, achieving power transmission.

[0043] like Figure 4 As shown, in order to restrict the movement trajectory of the paper end through the limiting mechanism 2, each limiting mechanism 2 includes a sleeve 21 and two symmetrically arranged limiting wheels 23. The two limiting wheels 23 are arranged in a V-shape, and a tube is fixedly installed in the middle of each limiting wheel 23. A first limiting bolt 24 is threaded through the end of the tube. A limiting groove 22 is provided on the sleeve 21, and the limiting groove 22 is arranged along the length of the sleeve 21. The two tubes are sleeved on the same sleeve 21, and the end of the first limiting bolt 24 extends into the limiting groove 22. Therefore, the resistance to the movement of the tube relative to the sleeve 21 can be increased under the action of the first limiting bolt 24, thereby making the limiting wheel 23 stably installed relative to the sleeve 21. In addition, since the tube and the sleeve 21 are adjustablely connected, the distance between the two limiting wheels 23 can be easily adjusted according to the width of the paper to be cut.

[0044] like Figure 3 As shown, in order to stably mount the sleeve 21 onto the support shaft 3, multiple threaded grooves 32 are provided on the support shaft 3. The multiple threaded grooves 32 are distributed along the length direction of the support shaft 3. The sleeve 21 is mounted on the support shaft 3, and a second limiting bolt 25 is provided through the middle of the sleeve 21. The end of the second limiting bolt 25 is threaded into the threaded groove 32.

[0045] The number of limiting mechanisms 2 can be determined according to the number of slit sheets, that is, one set of limiting mechanisms 2 is paired with one slit sheet of paper, thereby enabling the limiting of multiple sheets of paper.

[0046] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rewinding machine capable of restricting the ends of paper, characterized in that, The rewinding machine includes a rewinding machine body (1) and a limiting mechanism (2). Multiple sets of the limiting mechanism (2) are provided and are mounted on the same support shaft (3). Each set of the limiting mechanism (2) includes two symmetrically arranged limiting wheels (23). A bottom roller (4) is provided below the multiple sets of the limiting mechanism (2). The bottom roller (4) is arranged parallel to the support shaft (3) and the limiting wheels (23) and the bottom roller (4) are distributed on the upper and lower sides of the paper. A bracket (5) and a transmission mechanism (6) are provided at both ends of the bottom roller (4) and the support shaft (3). The transmission mechanism (6) is mounted on the bracket (5).

2. A rewinding machine capable of restricting the ends of paper according to claim 1, characterized in that, The two limiting wheels (23) are arranged in a figure-eight shape, and a tube is fixedly provided in the middle of each limiting wheel (23). A first limiting bolt (24) is threaded through the end of the tube. The two tubes are sleeved on the same sleeve (21), and the end of the first limiting bolt (24) extends into the limiting groove (22) of the sleeve (21).

3. A rewinding machine capable of restricting the ends of paper according to claim 2, characterized in that, Multiple threaded grooves (32) are provided on the support shaft (3), and the multiple threaded grooves (32) are distributed along the length direction of the support shaft (3). The sleeve (21) is sleeved on the support shaft (3), and a second limiting bolt (25) is provided through the middle of the sleeve (21). The end of the second limiting bolt (25) is threaded into the threaded groove (32).

4. A rewinding machine capable of restricting the ends of paper according to claim 1, characterized in that, The transmission mechanism (6) includes a first bearing seat (61) and a second bearing seat (62), which are respectively sleeved on the ends of the support shaft (3) and the bottom roller (4); a first gear (65) is also sleeved on the end of the bottom roller (4), a second gear (66) is meshed and connected to the side of the first gear (65), a second wheel body is coaxially arranged on the side of the second gear (66), and a first wheel body (64) is sleeved on the end of the support shaft (3), and the first wheel body (64) and the second wheel body are connected.

5. A rewinder for restricting the ends of paper according to claim 4, characterized in that, A snap-fit ​​post (68) is fixedly provided on the side wall of the second bearing seat (62). An end plate (63) is provided at the end of the central shaft of the second gear (66) and the second wheel body. The side wall of the end plate (63) is provided with a snap-fit ​​groove (67), and the end plate (63) is fitted to the side wall of the second bearing seat (62). At the same time, the snap-fit ​​post (68) passes through the snap-fit ​​groove (67).

6. A rewinder for restricting the ends of paper according to claim 5, characterized in that, A driven wheel (31) is provided at one end of the support shaft (3), and the driven wheel (31) is connected to the power wheel of the rewinder body (1) by a chain or belt.

7. A rewinder for restricting the ends of paper according to claim 4, characterized in that, The support (5) includes a base plate (51), a base frame (54), a first fixing plate (57), and a top tube (56). The base frame (54) and the base plate (51) are both configured as L-shaped structures. A vertical tube (52) and a threaded rod (53) are provided on the base plate (51). The vertical tube (52) and the threaded rod (53) are provided through the bottom of the base frame (54), and two nuts threaded on the threaded rod (53) are distributed on the upper and lower sides of the base frame (54). The first fixing plate (57) is installed on the top of the base frame (54), and the top tube (56) is installed on the top of the first fixing plate (57).

8. A rewinder for restricting the ends of paper according to claim 7, characterized in that, A pull-down mechanism (7) is provided on the side of the first fixed plate (57). The pull-down mechanism (7) includes a second fixed plate (71) and a spring (73). The second fixed plate (71) is arranged parallel above the first fixed plate (57), and a first sleeve frame (72) is fixedly provided on the side of the second fixed plate (71). A second sleeve frame (75) is provided below the first sleeve frame (72). The first sleeve frame (72) and the second sleeve frame (75) are both sleeved on the top pipe (56). An end plate (74) is provided on the side of the first sleeve frame (72) and the second sleeve frame (75). The spring (73) is arranged between the two end plates (74) and the spring (73) is in an extended state.

9. A rewinder for restricting the ends of paper according to claim 8, characterized in that, The first bearing housing (61) and the second bearing housing (62) are respectively installed on the side of the second fixing plate (71) and the first fixing plate (57) that are close to each other.

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