Rewinding machine and its roller riding device

Abstract

The application provides a rewinding machine and a riding roller device thereof. The riding roller device comprises a movable frame and a paper pressing device. The movable frame comprises a first support, a second support and a driving unit. The first support is used for being slidably connected with a support of the rewinding machine. The second support is slidably connected with the first support. The driving unit is connected with the first support and the second support at two ends respectively and is used for driving the second support to slide relative to the first support. The paper pressing device comprises a pressing roller assembly and a connecting assembly. The pressing roller assembly is connected with the second support through the connecting assembly. The pressing roller assembly can move with the second support relative to the first support. The riding roller device is provided in the application. The first support and the second support are designed to be relatively slidable. The driving unit is used for driving the paper pressing device to move up and down. In addition, the movable frame can also slide transversely relative to the support of the rewinding machine. Thus, the flexibility of the riding roller device is greatly improved. The pressing contact reliability of the riding roller device on the paper web is enhanced. The working efficiency of the rewinding machine is improved.

Description

Technical Field

[0001] This application relates to the technical field of papermaking equipment, specifically to a rewinder and its roller-riding device. Background Technology

[0002] In the papermaking process, rewinders rewind and cut master rolls according to customer order specifications. Our rewinders cut large paper rolls with an effective width of approximately 10 meters from large paper machines into smaller rolls of various specifications, with widths ranging from 0.5 to 3 meters. For example, one of our rewinders has a maximum speed of 2500 m / min and an effective width of 9730 mm. The core function of the rewinder's saddle roller is to assist in paper roll formation and control roll diameter accuracy. By applying stable pressure to the surface of the paper roll during rewinding, it ensures that the finished paper roll is tight, uniform, and wrinkle-free. It also assists in driving the paper roll rotation, ensuring a smooth and efficient rewinding process. Its specific functions can be divided into the following three points: 1. Ensuring uniform and tight roll diameter: The saddle roller presses against the surface of the paper roll to be rewound. By adjusting the pressure, it eliminates air between paper layers, preventing the paper roll from becoming loose, wrinkled, or developing a "chrysanthemum core," ensuring consistent tightness of the finished paper roll to meet subsequent processing or usage requirements. 2. Auxiliary Drive and Stable Operation: Some riding rollers are equipped with drive devices that can rotate in tandem with the main winding roller, providing additional driving force to the paper roll and preventing slippage during rewinding. This is especially suitable for high-speed rewinding scenarios, ensuring stable paper feed speed. 3. Adapting to Dynamic Roll Diameter Changes: As rewinding progresses, the paper roll diameter gradually increases. The riding roller moves upward synchronously via a lifting mechanism, maintaining constant pressure against the paper roll surface. This adapts to dynamic changes in roll diameter throughout the process, ensuring stable rewinding quality.

[0003] However, conventional rewinding machines have problems such as fixed position, inability to raise or lower, and insufficient stability in contact with the paper web. Summary of the Invention

[0004] The first aspect of this application provides a roller-riding device for a rewinder, the roller-riding device comprising: The movable frame includes a first support, a second support, and a drive unit. The first support is slidably connected to the rewinder support, the second support is slidably connected to the first support, and the two ends of the drive unit are respectively connected to the first support and the second support, and are used to drive the second support to slide relative to the first support. The paper pressing device includes a pressure roller assembly and a connecting assembly. The pressure roller assembly is connected to a second support via the connecting assembly, and the pressure roller assembly can move with the second support relative to the first support.

[0005] In some alternative embodiments, the first bracket is provided with slide rails and / or slide grooves on opposite sides, and the second bracket is provided with sliders and / or slide columns that cooperate with the slide rails and / or slide grooves.

[0006] In some alternative embodiments, the top of the first bracket is provided with a pulley for sliding connection with the rewinder bracket, and the bottom of the first bracket is provided with a sliding sleeve for sliding connection with the rewinder slide bar.

[0007] In some alternative embodiments, the drive unit is a cylinder, the cylinder body of which is connected to the first bracket, and the piston rod of which is connected to the second bracket.

[0008] In some optional embodiments, the connecting assembly includes a connecting unit and a main shaft. The two sides of the connecting unit are rotatably connected to the connecting lugs on the second bracket via connecting shafts. The two ends of the main shaft are connected to the connecting unit and the pressure roller assembly, respectively.

[0009] In some optional embodiments, the connecting unit includes a connecting frame and a connecting block. The connecting block is disposed within the connecting frame. A first auxiliary connecting shaft and a second auxiliary connecting shaft are respectively provided at both ends of the connecting block. The first auxiliary connecting shaft is fixedly connected to the connecting frame through the first auxiliary connecting block, and the second auxiliary connecting shaft is fixedly connected to the connecting frame through the second auxiliary connecting block. A through hole is provided in the middle of the connecting block, and the main shaft passes through the through hole with a gap. A hanging plate is fixedly provided at the top end of the main shaft. The maximum outer periphery dimension of the hanging plate is larger than the diameter of the through hole of the connecting block. The bottom end of the main shaft is connected to the pressure roller assembly.

[0010] In some optional embodiments, the hanging plate is rectangular, and a rectangular space is formed within the connecting frame. The hanging plate is located within the rectangular space, and the size of the hanging plate is slightly smaller than the inner wall size of the rectangular space, thereby allowing the hanging plate to rotate at a small angle within the rectangular space.

[0011] In some alternative embodiments, a friction plate is sandwiched between the hanging plate and the connecting block, and the friction plate is sleeved on the main shaft.

[0012] In some optional embodiments, the pressure roller assembly includes a pressure roller bracket, a first pressure roller, and a second pressure roller, wherein the first pressure roller and the second pressure roller are arranged in parallel and side by side, and the two ends of the first pressure roller and the second pressure roller are respectively rotatably connected to the pressure roller bracket; the pressure roller bracket is fixedly connected to the main shaft and can rotate synchronously with the main shaft.

[0013] Secondly, embodiments of this application provide a rewinding machine, which includes the riding roller device described in the above embodiments.

[0014] The saddle roller device for a rewinder provided in this application embodiment is designed with a relatively sliding bracket and uses a drive unit to drive the paper pressing device to move up and down. In addition, the movable frame can also slide laterally relative to the rewinder bracket, thereby greatly improving the flexibility of the saddle roller device, enhancing the reliability of the saddle roller device's pressing contact with the paper web, and improving the working efficiency of the rewinder. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the roller-riding device for a rewinder according to this application; Figure 2 yes Figure 1 A schematic diagram of the movable frame in the embodiment; Figure 3 yes Figure 2 A schematic diagram of the disassembled structure of the movable frame in the embodiment; Figure 4 yes Figure 1 A schematic diagram of the paper pressing device in the embodiment; Figure 5 yes Figure 4 A partial structural breakdown diagram of the intermediate paper pressing device; Figure 6 yes Figure 4 A schematic diagram of the disassembled structure of the medium-pressure paper press; Figure 7 yes Figure 4 A cross-sectional view of the paper pressing device along line AA in the embodiment; Figure 8 yes Figure 4 A top view of the paper pressing device in the embodiment. Detailed Implementation

[0017] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0018] The terms "first," "second," and "third" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movement of components in a specific posture (as shown in the figures). If the specific posture changes, the directional indication will also change accordingly. The terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0019] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0020] First, this application provides a roller-riding device for a rewinder. Please refer to [link to relevant documentation]. Figure 1 , Figure 1 This is a schematic diagram of the overall structure of an embodiment of the roller saddle device for a rewinder according to this application. The roller saddle device for a rewinder includes, but is not limited to, the following structures: a movable frame 100 and a paper pressing device 200.

[0021] For details, please refer to the following: Figure 2 and Figure 3 , Figure 2 yes Figure 1 A schematic diagram of the structure of the movable frame in the embodiment. Figure 3 yes Figure 2The schematic diagram of the disassembled structure of the movable frame in this embodiment shows that the movable frame 100 includes a first support 110, a second support 120, and a drive unit 130. The first support 110 is slidably connected to the rewinder support (not shown in the figure). Optionally, the top of the first support 110 in this embodiment is provided with a pulley 300, which is slidably connected to the rewinder support. In addition, the bottom of the first support 110 is provided with a sliding sleeve 400 (which can be one, two, or more, not specifically limited here), which is slidably connected to the rewinder slide bar, thereby realizing a large range of lateral movement of the entire riding roller device. The riding roller device in conventional solutions cannot move laterally. Therefore, the paper width is constant, which limits the application scenarios. However, in this embodiment, multiple sets of riding roller devices can be set on the support of the rewinder. According to the width of the paper to be cut and rewound, different numbers of riding roller devices can be moved to the corresponding positions for operation.

[0022] Please continue reading. Figure 2 and Figure 3 In this embodiment, the second bracket 120 is slidably connected to the first bracket 110. Specifically, the first bracket 110 in this embodiment has slide rails 111 and slide grooves 112 on opposite sides, respectively. Correspondingly, the second bracket 120 has sliders 121 and slide posts 122 (which can be one, two, or more, and the number is not specifically limited) that cooperate with the slide rails 111 and slide grooves 112, thereby realizing the slidable connection between the second bracket 120 and the first bracket 110. Of course, in some other embodiments, the first bracket 110 may also have slide rails 111 or slide grooves 112 on opposite sides. The detailed features of this part are within the understanding of those skilled in the art and will not be described in detail here.

[0023] The two ends of the drive unit 130 are connected to the first bracket 110 and the second bracket 120 respectively, and are used to drive the second bracket 120 to slide relative to the first bracket 110. Optionally, the drive unit 130 in this embodiment can be a cylinder, a hydraulic cylinder, a linear motor, a motor screw, or other structures. In this embodiment, the drive unit 130 is a cylinder. The cylinder body 131 is hinged to the first bracket 110 through a hinge bracket 140, and the piston rod 132 of the cylinder is hinged to the second bracket 120 through a hinge plate 150.

[0024] Optionally, please refer to the following as well. Figure 1 and Figure 4 , Figure 4 yes Figure 1The schematic diagram of the paper pressing device in the embodiment shows that the paper pressing device 200 in this embodiment includes a pressure roller assembly 210 and a connecting assembly 220. The pressure roller assembly 210 is connected to the second support 120 through the connecting assembly 220. The pressure roller assembly 210 can move with the second support 120 relative to the first support 110, thereby realizing lifting and lowering in the vertical direction.

[0025] Optionally, please refer to the following as well. Figures 4 to 6 , Figure 5 yes Figure 4 A partial structural breakdown diagram of the medium-pressure paper press. Figure 6 yes Figure 4 A schematic diagram of the disassembled structure of the medium-pressure paper device. In this embodiment, the connecting component 220 includes a connecting unit 221 and a main shaft 222. The two sides of the connecting unit 221 are rotatably connected to the connecting lugs 1201 on the second bracket 120 via connecting shafts 2201. The two ends of the main shaft 222 are connected to the connecting unit 221 and the pressure roller assembly 210, respectively.

[0026] Optionally, please refer to the following as well. Figure 4 , Figure 7 as well as Figure 8 , Figure 7 yes Figure 4 A cross-sectional view of the paper pressing device along line AA in the embodiment. Figure 8 yes Figure 4 The top view of the paper pressing device in this embodiment shows that the connecting unit 221 includes a connecting frame 2211 and a connecting block 2212. The connecting block 2212 is disposed inside the connecting frame 2211. The two ends of the connecting block 2212 are respectively provided with a first auxiliary connecting shaft 2213 and a second auxiliary connecting shaft 2214. The first auxiliary connecting shaft 2213 is fixedly connected to the connecting frame 2211 through the first auxiliary connecting block 2215. The second auxiliary connecting shaft 2214 is fixedly connected to the connecting frame 2211 through the second auxiliary connecting block 2216. The fixed connection between the second auxiliary connecting block 2216 and the first auxiliary connecting block 2215 and the connecting frame 2211 can be achieved by connecting with screws 2210.

[0027] The connecting block 2212 has a through hole 22120 in the middle. The main shaft 222 passes through the through hole 22120 and is spaced apart from the through hole 22120. The top of the main shaft 222 is fixed with a hanging plate 223 (which can be fixed by screws, not shown in the figure). The maximum outer contour dimension of the hanging plate 223 is larger than the diameter of the through hole 22120 on the connecting block 2212, ensuring that the hanging plate 223 is located at the top of the connecting block 2212. The bottom end of the main shaft 222 is connected to the pressure roller assembly 210.

[0028] Optionally, in this embodiment, the hanging plate 223 and the main shaft 222 can rotate synchronously. The shape of the hanging plate 223 can be rectangular, and a rectangular space 22110 is formed within the connecting frame 2211. The hanging plate 223 is located within the rectangular space 22110, and the size of the hanging plate 223 is slightly smaller than the inner wall size of the rectangular space 22110. That is, a gap 203 is provided between the side of the hanging plate 223 and the inner wall of the connecting frame 2211, so that the hanging plate 223 can rotate at a small angle within the rectangular space 22110, that is, the main shaft 222 together with the pressure roller assembly 210 can rotate around the axis of the main shaft 222 within a small angle range.

[0029] In this embodiment, the connecting component structure is designed so that the main shaft 222 and the pressure roller assembly 210 can rotate around the axis of the main shaft 222 within a small angle range. The direction of the pressure roller can be adaptively adjusted according to the direction of the paper roll, thereby reducing the probability of paper defects.

[0030] Alternatively, please continue reading Figure 6 and Figure 7 In this embodiment, a friction plate 224 is sandwiched between the hanging plate 223 and the connecting block 2212. The friction plate 224 is sleeved on the main shaft 222. The function of the friction plate 224 is to prevent the main shaft 222 and the pressure roller assembly 210 from rotating too flexibly. By increasing the friction between the hanging plate 223 and the connecting block 2212, the rotational resistance of the main shaft 222 is increased. Specifically, the friction plate 224 may include a copper sheet 2241 and a wear-resistant fiber material sheet 2242 that cooperate with each other.

[0031] Optionally, the pressure roller assembly 210 in this embodiment includes a pressure roller bracket 213, a first pressure roller 211, and a second pressure roller 212. The first pressure roller 211 and the second pressure roller 212 are arranged in parallel, and their two ends are rotatably connected to the pressure roller bracket 213. The pressure roller bracket 213 is fixedly connected to the main shaft 222 and can rotate synchronously with the main shaft 222. During operation, the first pressure roller 211 and the second pressure roller 212 are synchronously pressed onto the paper roll, and the surfaces of the first pressure roller 211 and the second pressure roller 212 may be covered with a rubber coating. The pressure roller assembly structure in this embodiment, through the design of a double-roller structure, can better press the paper roll and improve pressing stability.

[0032] Alternatively, please continue reading Figure 6 and Figure 7 In this embodiment, the bottom of the main shaft 222 can be fixedly connected to the pressure roller bracket 213 by connecting plate 225 and connecting screw 226. A spacer 227 is provided between the pressure roller bracket 213 and the connecting block 2212. The spacer 227 is used to block the connecting block 2212 and the pressure roller bracket 213.

[0033] In addition, this application embodiment also provides a rewinder equipped with the riding roller device in the aforementioned embodiment. Other structural features of the rewinder are within the understanding of those skilled in the art and will not be described in detail here. The rewinder in this embodiment is designed with a relatively sliding support and uses a drive unit to drive the paper pressing device to move up and down. In addition, the movable frame can also slide laterally relative to the rewinder support, thereby greatly improving the flexibility of the riding roller device, enhancing the reliability of the riding roller device's pressing contact with the paper web, and improving the working efficiency of the rewinder.

[0034] The above description is only a part of the embodiments of this application and does not limit the scope of protection of this application. Any equivalent device or equivalent process transformation made based on the content of this application specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this application.

Claims

1. A roller-riding device for a rewinder, characterized in that, The roller riding device includes: The movable frame includes a first support, a second support, and a drive unit. The first support is slidably connected to the rewinder support, the second support is slidably connected to the first support, and the two ends of the drive unit are respectively connected to the first support and the second support, and are used to drive the second support to slide relative to the first support. The paper pressing device includes a pressure roller assembly and a connecting assembly. The pressure roller assembly is connected to a second support via the connecting assembly, and the pressure roller assembly can move with the second support relative to the first support.

2. The roller-riding device according to claim 1, characterized in that, The first bracket has slide rails and / or slide grooves on opposite sides, and the second bracket has sliders and / or slide columns that cooperate with the slide rails and / or slide grooves.

3. The roller-riding device according to claim 2, characterized in that, The first support is provided with a pulley at the top, which is used to slide and connect with the rewinder support. The first support is provided with a sliding sleeve at the bottom, which is used to slide and connect with the rewinder slide rod.

4. The roller-riding device according to claim 3, characterized in that, The drive unit is a cylinder, the cylinder body is connected to the first bracket, and the piston rod of the cylinder is connected to the second bracket.

5. The roller-riding device according to claim 1, characterized in that, The connecting assembly includes a connecting unit and a main shaft. The two sides of the connecting unit are rotatably connected to the connecting lugs on the second bracket via connecting shafts. The two ends of the main shaft are connected to the connecting unit and the pressure roller assembly, respectively.

6. The roller-riding device according to claim 5, characterized in that, The connecting unit includes a connecting frame and a connecting block. The connecting block is disposed within the connecting frame. A first auxiliary connecting shaft and a second auxiliary connecting shaft are respectively provided at both ends of the connecting block. The first auxiliary connecting shaft is fixedly connected to the connecting frame through the first auxiliary connecting block, and the second auxiliary connecting shaft is fixedly connected to the connecting frame through the second auxiliary connecting block. A through hole is provided in the middle of the connecting block, and the main shaft passes through the through hole and is spaced apart from the through hole. A hanging plate is fixedly provided at the top of the main shaft. The maximum outer contour dimension of the hanging plate is larger than the diameter of the through hole of the connecting block. The bottom end of the main shaft is connected to the pressure roller assembly.

7. The roller-riding device according to claim 6, characterized in that, The hanging plate is rectangular, and a rectangular space is formed within the connecting frame. The hanging plate is located within the rectangular space, and the size of the hanging plate is slightly smaller than the inner wall size of the rectangular space, thereby allowing the hanging plate to rotate at a small angle within the rectangular space.

8. The roller-riding device according to claim 7, characterized in that, A friction plate is sandwiched between the hanging plate and the connecting block, and the friction plate is sleeved on the main shaft.

9. The roller-riding device according to claim 5, characterized in that, The pressure roller assembly includes a pressure roller bracket, a first pressure roller, and a second pressure roller. The first pressure roller and the second pressure roller are arranged in parallel. The two ends of the first pressure roller and the second pressure roller are respectively rotatably connected to the pressure roller bracket. The pressure roller bracket is fixedly connected to the main shaft and can rotate synchronously with the main shaft.

10. A rewinding machine, characterized in that, The rewinder includes the roller assembly as described in any one of claims 1-9.

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