Winding device for membrane material silk screen

Abstract

The invention relates to the technical field of winding equipment, and particularly discloses a winding device for a membrane material silk screen, which comprises a rack and two winding rollers, and further comprises a displacement device for driving the two winding rollers to synchronously rotate along a circular track for transposition; the rotating rod is rotationally mounted on the rack, a rotating shaft is mounted on the rotating rod, and two ropes are wound on the rotating shaft; butt-joint blocks capable of being in butt joint with the bottom ends of the rotating rods are rotationally installed at the two ends of the tensioning roller correspondingly, the two butt-joint blocks are connected with the two ropes correspondingly, the tensioning roller and the winding roller have magnetism, attraction force exists between the tensioning roller and the winding roller, and fixing and winding of a membrane material are achieved through the magnetic attraction force between the tensioning roller and the winding roller. The position and movement of the tensioning roller are controlled through the butt joint mechanism and the rope, and the automatic roll changing device has the advantages that automatic roll changing can be achieved, damage to a membrane material is avoided, and the continuity of the rolling process and the material roll compactness are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of winding equipment, and in particular to a winding device for a membrane screen. Background Art

[0002] Membrane meshes, including polymer films, metal meshes, and composite meshes, are used in a variety of fields, including printing, electronics, textiles, construction, and environmental protection. The winder plays a crucial role in the production of these materials. It is responsible for winding and storing the continuously formed membrane mesh. The quality of the winder not only directly affects the performance of the material during subsequent processing but also has a decisive impact on the yield of the end product. Therefore, ensuring the stability and precision control of the winder is a key link in the entire production process and is crucial for improving production efficiency and product quality.

[0003] The Chinese patent document with authorization announcement number CN105668280B discloses a strip winding device, wherein the locking member is composed of a lock post arranged on the wall of the card slot, one end of the lock post is arranged in a fixing hole opened in the wall of the card slot, and a compression spring is arranged in the fixing hole, and a lock hole for inserting the lock post is provided at a position corresponding to the lock post on the insert plate, and the lock post is arranged at intervals on the groove wall of the card slot along the roller length direction of the material roller, and one end of the lock post protruding from the groove wall of the card slot is set in a spike shape. The winding device in the patent document can rotate the support plate after the previous material roller is wound up, and place another new material roller in the winding position. Since the strip is laid on the surface of the new material roller, when the insert plate is inserted into the card slot of the new material roller, the insert plate will press the strip together to achieve the fixation of the strip on the new material roller, and then cut the strip between the two material rollers, and the driving mechanism drives the new material roller to rotate to reel, and unload the full reel.

[0004] When the existing winding equipment is in use, the film material needs to be fixed on the reel after the roll is changed, so that it can be fixed by gluing, or the film material can be clamped on the reel by using fixing parts (such as pressure rods, pressure plates or pressure blocks) as described in the above-mentioned patent documents, and then the film material is wound on the reel as the reel rotates. However, after the film material is wound on the reel for multiple turns, if the fixing parts are not removed, it will lead to increased costs. Therefore, in most cases, the fixing parts must be separated from the film materials. In the process of pulling out the fixing parts, relative sliding friction will occur between the fixing parts and the film material, which may cause scratches on the surface of the film material. In addition, once the fixing parts are pulled out, gaps will be left between the film materials, which may cause the material inside the roll to become loose, thereby affecting the overall structure and stability of the material. Summary of the Invention

[0005] The present invention provides a film material screen winding device, which aims to solve the problem in the related art that it is inconvenient to fix the end of the film material on the reel.

[0006] The cam is secured to the chassis by a spring which is secured to the chassis by a spring which is secured to the chassis by a spring which is secured to the chassis by a spring which is secured to the chassis by a spring which is secured to the chassis by a spring which is secured to the chassis by a spring which is secured to the chassis by a spring The torque bearing has a hook portion on its outer ring that can cooperate with the docking block. When the rear winding roller is wound, the docking block abuts against the rotating rod, and the tensioning roller presses the film material between the two winding rollers. After the film material between the rear winding roller and the tensioning roller is cut off, the tensioning roller rotates downward with the end of the film material, so that the film material is clamped between the winding roller and the tensioning roller. The docking block is hooked with the hook portion, the rope is released, and the tensioning roller rotates around the axis of the winding roller until it reaches the front and upper part of the winding roller. As the film material on the winding roller becomes thicker, the docking block disengages from the abutting portion, the rope is retracted and the tensioning roller is reset, and the two winding rollers swap front and back.

[0007] The effect is that during the winding process, when the winding roller at the rear is winding, the docking block of the tensioning roller is against the bottom end of the rotating rod, so that the tensioning roller and the rotating rod are connected together, and the tensioning roller presses the film material between the two winding rollers by gravity to make the film material taut. When the rear winding roller completes winding, the cutting device cuts off the film material between the rear winding roller and the tensioning roller. At this time, under the action of gravity, the tensioning roller rotates downward with the film material until it is blocked by the winding roller in front, and there is a magnetic force between the two. The rope is released until it reaches the upper front of the winding roller and is unfastened to the maximum length. As the film material is wound around the winding roller, the tension roller and the winding roller gradually move away from each other, and finally the docking block is disengaged from the hooking portion. The rope is retracted to make the tension roller dock with the rotating rod again. At the same time, the position shifting device causes the two winding rollers to swap positions.

[0008] Preferably, the displacement device includes a rotating plate rotatably mounted on the frame in the middle, and two winding rollers are rotatably mounted at both ends of the rotating plate respectively. A driving device for driving the two winding rollers to rotate is installed on the rotating plate. The rotation of the rotating plate drives the front and rear positions of the two winding rollers to be exchanged. During this process, the driving device continuously drives the winding rollers to rotate, and winding is always performed to avoid stopping for changing rolls to affect efficiency.

[0009] Preferably, the driving device includes a motor fixedly mounted on a rotating plate, the output end of the motor is coaxially connected to one of the winding rollers, and a synchronization mechanism is installed between the two winding rollers for causing the two to rotate synchronously. The motor drives one winding roller to rotate, and the synchronization mechanism causes the other winding roller to rewind synchronously.

[0010] Preferably, a docking groove is provided at the bottom end of the rotating rod, and a protrusion adapted to the docking groove is provided on the docking block. The rope passes through the docking groove and is connected to the protrusion. The stability of the connection between the rotating rod and the clamping roller is ensured by the protrusion and the docking groove.

[0011] Preferably, the winding roller consists of a main shaft and a plurality of arc-shaped bars arranged in a circular array around the main shaft. A driving member is installed on the main shaft for controlling the arc-shaped bars to synchronously move away from or approach the main shaft. When the reel is removed from or put on the winding roller, the driving member causes the arc-shaped bars to move closer to the main shaft, and the winding roller becomes thinner. By changing the diameter of the winding roller, it is convenient to fix and release the reel, thereby facilitating the roll changing work.

[0012] Preferably, on the front projection plane, the rope is located between two vertical lines passing through the two ends of the arc strip, so as to avoid interference between the rope and the synchronization mechanism and the docking mechanism at both ends of the winding roller.

[0013] Preferably, the arc strip is made of magnetic conductive material, and a magnetic layer is provided on the outer surface of the tensioning roller. The magnetic layer and the magnetic conductive material attract each other so that the tensioning roller and the winding roller generate an attractive force that moves them closer to each other.

[0014] Preferably, a spiral spring is installed between the rotating shaft and the rotating rod. The spiral spring is used to apply torsion to the rotating shaft, so that the protrusion enters the docking groove. When the winding roller causes the tensioning roller to revolve, the rope is automatically pulled out. When the winding roller separates from the tensioning roller, the spiral spring releases elastic potential energy to automatically reset the rope and the winding roller, thereby achieving stable docking and automatic reset.

[0015] Preferably, the docking mechanism also includes a ratchet ring, a hooking portion is formed between the ratchet teeth of the ratchet ring, the ratchet ring is coaxially fixedly connected to the outer ring of the torque bearing, and a hook claw that can enter the hooking portion is provided on the docking block, and multiple hooking portions are formed between the ratchet teeth of the ratchet ring, providing multiple connection points for the hook claw. Therefore, when the hook claw is docked with the ratchet ring, the winding roller can complete the docking by rotating a very small angle, ensuring the timeliness of the docking, increasing the flexibility of the connection, and realizing a reliable connection between the tensioning roller and the winding roller. As the thickness of the film material on the winding roller increases, the hook claw will automatically detach from the hooking portion without manual intervention.

[0016] Preferably, a limiting ring is fixedly provided on one side of the ratchet ring away from the middle of the winding roller, and the radius of the limiting ring is larger than the outer radius of the ratchet ring. The existence of the limiting ring can prevent the docking block from detaching from the side of the ratchet during the revolution of the tensioning roller. When the tensioning roller rotates around the axis of the winding roller, the rope and the ratchet ring limit the winding roller. Therefore, the docking block may have a tendency to move sideways. However, the limiting ring forms a physical barrier to prevent the lateral movement of the docking block, thereby ensuring the stability of the hooking.

[0017] By adopting the above technical solution, the beneficial effects of the present invention are: The film is then wound around the drum and the web is rewound, and the web is then rewound around the drum, and the web is ... 2. The original intention of the design of the volute spring is to apply the necessary torque to the rotating shaft to ensure the normal operation of the mechanical device. Through its unique protrusion design, the spring can smoothly enter the docking groove to achieve stable docking between mechanical components. When the winding roller starts working, the tensioning roller will revolve and the rope will be pulled out. This process effectively utilizes the force storage characteristics of the volute spring. Subsequently, when the winding roller is separated from the tensioning roller, the volute spring releases the previously stored elastic potential energy, prompting the rope and winding roller to quickly and automatically reset. This mechanism not only ensures stable docking between mechanical components, but also realizes the automatic reset function of the entire system, greatly improving the efficiency and reliability of mechanical operation. 3. During the docking process between the hook and the ratchet ring, the winding roller only needs to rotate a very small angle to quickly complete the docking action. This design significantly improves the timeliness of docking and greatly enhances the flexibility of the connection. In this way, a stable and reliable connection between the tensioning roller and the winding roller is achieved. As the thickness of the film material on the winding roller gradually increases, the hook will automatically disengage from the hooking part. The entire process does not require any manual intervention. When the tensioning roller rotates around the axis of the winding roller, the rope and the ratchet ring work together to effectively limit the winding roller. Despite this, there may be a tendency to move sideways during the movement of the docking block. However, the presence of the limit ring limits the movement range of the docking block, effectively blocking the lateral movement of the docking block, thereby ensuring the stability of the entire hooking process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure during step two and step ten.

[0019] Figure 2 This is the left view after hiding the frame and limit ring in steps 2 and 10.

[0020] Figure 3 This is the top view after hiding the rack in steps 2 and 10.

[0021] Figure 4 This is a schematic diagram of the overall structure during step four.

[0022] Figure 5 This is the left view after hiding the frame and limit ring in step 4.

[0023] Figure 6 This is the left view after hiding the frame and limit ring in step seven.

[0024] Figure 7 for Figure 6 Schematic diagram of the enlarged structure at point A in the middle.

[0025] Reference numerals: 1. Frame; 11. Limit rod; 2. Winding roller; 3. Cutting device; 4. Positioning device; 41. Rotating plate; 42. Driving device; 5. Rotating rod; 51. Rotating shaft; 52. Rope; 53. Volute spring; 6. Tensioning roller; 61. Docking block; 611. Bump; 612. Hook; 7. Docking mechanism; 71. Torque bearing; 72. Ratchet ring; 73. Limit ring. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0027] like Figure 1-Figure 7 As shown, a film material screen winding device includes: a frame 1, two winding rollers 2, a cutting device 3, a shifting device 4, a rotating rod 5, a tensioning roller 6, and a docking mechanism 7. The two winding rollers 2 are respectively mounted on the two moving ends of the shifting device 4. The positions of the two winding rollers 2 are swapped by the shifting device 4. The cutting device 3 is mounted on the frame 1 and is located obliquely above and in front of the rear tensioning roller 6. The rotating rod 5 is rotatably mounted on the frame 1. The tensioning roller 6 is detachably arranged at the bottom end of the rotating rod 5. The docking mechanism 7 is mounted on the end of the winding roller 2. When the rear winding roller 2 is wound, the tensioning roller 6 presses the film material between the two winding rollers 2, thereby utilizing the gravity of the tensioning roller 6 to apply tension to the film material. The film material is kept flat. When the film material on the rear winding roller 2 is wound, the cutting device 3 cuts the film material, and the rotating rod 5 rotates downward with the winding roller 2, thereby moving the film material downward and sticking to the winding roller 2. Then the tensioning roller 6 and the winding roller 2 clamp the end of the film material, and the tensioning roller 6 and the winding roller 2 are connected together by the docking mechanism 7. The tensioning roller 6 is separated from the bottom of the rotating rod 5, so that the tensioning roller 6 rotates nearly 250° and rotates to the front and upper part of the winding roller 2. Then the tensioning roller 6 no longer rotates, thereby sending the end of the film material to the space between the wound film material and the reel, winding several times, and after the end is fixed, the tensioning roller 6 is reset, and the shifting mechanism causes the two winding rollers 2 to exchange positions, completing a complete winding process.

[0028] The winding roller 2 consists of a main shaft, a driving member and multiple arc-shaped bars. The arc-shaped bars are made of magnetic material. The multiple arc-shaped bars are arranged in a circular array around the main shaft. The driving member is installed between the main shaft and the arc-shaped bars to control the arc-shaped bars to move away from or approach the main shaft synchronously. When the reel is removed from or put on the winding roller 2, the driving member makes the arc-shaped bars close to the main shaft, and the winding roller 2 becomes thinner, thereby facilitating the removal or putting on of the reel.

[0029] The driving member can be implemented in a variety of ways. For example, the arc strip is connected to the main shaft through a hinge. The driving member can be a hydraulic cylinder or an electric push rod, which is used to push or pull the arc strip. The position of the arc strip is controlled by adjusting the pressure. These control methods can achieve synchronous movement of the arc strip and ensure that the winding roller 2 maintains a cylindrical shape.

[0030] By making the winding roller 2 thinner, it is easier to remove the completed roll from the winding roller 2 or put a new roll onto the winding roller 2, thereby improving the convenience and efficiency of the roll changing operation. In addition, the variable diameter design can also adapt to rolls of different specifications. This flexibility enables the winding device to adapt to more application scenarios and material types.

[0031] The shifting device 4 includes a rotating plate 41 and a driving device 42. The middle part of the rotating plate 41 is rotatably mounted on the frame 1, and a servo motor for driving the rotating plate 41 to rotate is installed on the frame 1. Two main shafts are rotatably mounted on both ends of the rotating plate 41 respectively. The two main shafts can be mounted on both ends of the rotating plate 41 through bearings or other rotating connectors to maintain its stability during rotation. The driving device 42 is installed on the rotating plate 41 to drive the two winding rollers 2 to rotate. The rotating plate 41 can be made of a variety of materials, such as metal materials or high-strength engineering plastics. The shape of the rotating plate 41 can be designed according to actual needs, for example, it can be circular, elliptical or polygonal. The middle part of the rotating plate 41 can be connected to the frame 1 through a bearing or other rotating connector to achieve smooth rotational motion.

[0032] Furthermore, the displacement device 4 also includes a control system, which is used to accurately control the rotation of the rotating plate 41 and the rotation of the winding roller 2. Through this control system, the rotation speed and rotation angle of the rotating plate 41 can be flexibly adjusted according to the specific needs of the winding process. At the same time, the rotation speed of the winding roller 2 can also be adjusted accordingly to ensure the smoothness and efficiency of the entire winding process.

[0033] The driving device 42 includes a motor and a synchronization mechanism. The synchronization mechanism is installed between the two winding rollers 2 (for example, a sprocket chain mechanism is used to achieve precise synchronization control). The motor is installed on the rotating plate 41, and the motor output shaft is coaxially fixedly connected to one of the winding rollers 2. When the motor is started, the two winding rollers 2 rotate synchronously. This structural design can realize the synchronous rotation and front-to-back position shifting of the two winding rollers 2. The rotating plate 41 serves as a supporting structure to fix the two winding rollers 2 at its two ends, ensuring that the relative positions between the winding rollers 2 are fixed. The middle part of the rotating plate 41 is rotatably installed on the frame 1, so that the entire rotating plate 41 can rotate around the center point, thereby driving the two winding rollers 2 to move along a circular trajectory to realize front-to-back position shifting. The driving device 42 is installed on the rotating plate 41, which can directly drive the winding roller 2 to rotate, thereby ensuring the continuity of the winding process.

[0034] The advantages of this design are simple structure and reliable movement. The synchronous movement and position exchange of the two winding rollers 2 are achieved through a rotating plate 41 without the need for a complicated transmission mechanism. The drive device 42 is directly installed on the rotating plate 41 and moves with the rotating plate 41, avoiding the errors that may be caused by long-distance transmission. The entire displacement process can be carried out continuously.

[0035] When winding, first, the winding roller 2 at the rear is unloaded and the roll is changed, and then one end of the film material is fixed on the winding roller 2 in the front. Then, the winding roller 2 starts to rotate and the film material is wound on the winding roller 2. When the film material on the winding roller 2 reaches the preset thickness or length, the control system sends a signal to make the rotating plate 41 start to rotate.

[0036] The rotation of the rotating plate 41 drives the two winding rollers 2 along a circular trajectory, achieving the exchange of front and rear positions. During this process, the drive device 42 continuously drives the winding rollers 2 to rotate, ensuring the continuity of the winding process. When the rotating plate 41 rotates 180 degrees, the two winding rollers 2 have completed the exchange of front and rear positions. At this time, the winding roller 2 originally in the front has moved to the rear for winding, and the winding roller 2 originally in the rear has moved to the front. This design ensures the continuity of the winding process and improves efficiency.

[0037] There are two rotating rods 5, one end of the two rotating rods 5 is rotatably mounted on the frame 1 through a rotating shaft, and a limit rod 11 is fixedly installed on the frame 1 for limiting the maximum downward rotation angle of the rotating rod 5. When the limit rod 11 is against the rotating rod 5, the tensioning roller 6 and the winding roller 2 at the bottom of the rotating rod 5 clamp the film material. A rotating shaft 51 is rotatably installed between the two rotating rods 5. The interior of the two rotating rods 5 is hollow, and the bottom end is opened to form a docking groove. The two ends of the rotating shaft 51 enter the interior of the two rotating rods 5 respectively , and is wrapped with a rope 52, a spiral spring 53 is installed between the rotating shaft 51 and the rotating rod 5, and a plurality of pressure rods parallel to the rotation are fixedly connected to the rotating shaft to prevent the end of the film from passing through the tensioning roller 6 and the rotating shaft, and the front side of the pressure rod is provided with a coating that reduces friction (such as Teflon coating) or a row of rollers (not shown in the figure) are provided along the length direction of the pressure rod. When the winding roller 2 is shifted back and forth, the film on the front winding roller 2 contacts the coating or rollers on the front side of the pressure rod to avoid scratches on the film.

[0038] A magnetic layer is provided on the outer circumference of the tensioning roller 6, and the arc-shaped strip of magnetic conductive material can be attracted by the magnet layer, thereby generating an attractive force between the winding roller 2 and the tensioning roller 6. When the tensioning roller 6 is located in front of and above the winding roller 2 and no longer revolves around the axis of the winding roller 2, the winding roller 2 rotates by magnetism to cause the tensioning roller 6 to rotate, thereby transporting the end of the film material clamped between the two in the rotation direction of the winding roller 2. This magnetic attraction can also provide appropriate tension during the winding process to prevent the film material from loosening or wrinkling. At this time, the rotating rod 5 is blocked by the limit rod 11, and there is a large distance between the rotating rod 5 and the winding roller 2. Therefore, the rotating rod 5 cannot touch the film material, thereby avoiding scratches on the film material.

[0039] The magnetic conductive material of the arc strip can be made of metals such as iron, nickel, cobalt or their alloys, or soft magnetic materials such as silicon steel sheets. The magnet layer can be made of permanent magnets such as neodymium iron boron, ferrite and other materials. The magnet layer can be evenly distributed on the outer surface of the tensioning roller 6 or distributed at intervals.

[0040] Due to the existence of magnetic attraction, the tensioning roller 6 can better press the film material, improving the tightness and flatness of the winding. At the same time, the magnetic attraction can also drive the tensioning roller 6 to rotate synchronously when the winding roller 2 rotates, which is conducive to the smooth transmission of the film material.

[0041] In practical applications, the appropriate magnet strength and magnetic permeability material can be selected according to specific needs. For example, for thin membrane materials, weaker magnets can be used to avoid excessive pressure on the membrane materials; for thicker or heavier membrane materials, stronger magnets can be used to ensure sufficient clamping force.

[0042] The magnetic attraction force is used to effectively press the film material onto the tensioning roller 6, without the need for additional mechanical fixing devices, thus simplifying the structural design and eliminating the need to insert or remove any fixings, thereby avoiding mechanical damage to the film material. In addition, as the thickness of the film material on the winding roller 2 increases, the magnetic attraction force will gradually weaken, eventually causing the tensioning roller 6 to separate from the winding roller 2. This feature meets the actual needs of the winding process, and the tensioning roller 6 can be automatically disengaged without human intervention, thereby improving the degree of automation and efficiency of the winding process.

[0043] The two ends of the tensioning roller 6 are rotatably installed with docking blocks 61, and the docking blocks 61 are provided with protrusions 611 adapted to the docking grooves. The rope 52 passes through the docking grooves and is connected to the protrusions 611, so that the spiral spring 53 applies a pulling force to the rope 52 to pull the protrusions 611, so that the protrusions 611 enter the docking grooves, ensuring the stability of the connection between the docking block 61 and the rotating rod 5. On the front projection surface, the rope 52 is located between two vertical lines passing through the two ends of the arc strip respectively, so that when the tensioning roller 6 revolves close to the winding roller 2, the rope 52 rests on the arc strip to prevent the rope 52 from falling off the winding roller 2.

[0044] Through the cooperation of the docking groove, the protrusion 611 and the rope 52, a reliable connection between the rotating rod 5 and the docking block 61 of the tensioning roller 6 is achieved. The docking groove provides a fixed connection point, the protrusion 611 ensures the stability of the connection, and the rope 52 provides the necessary flexibility. This connection method not only ensures the firmness of the connection, but also allows the tensioning roller 6 to perform necessary movements during the winding process. The rotating rod 5 can control the position and movement of the tensioning roller 6 relative to it through the rope 52, thereby achieving the fixation and guidance of the end of the film material.

[0045] The docking groove at the bottom of the rotating rod 5 can be designed in various shapes, such as circular, square, or polygonal, to accommodate different connection requirements. The protrusion 611 on the docking block 61 needs to match the shape of the docking groove to ensure a secure connection. The rope 52 can be made of different materials, such as nylon, steel wire, or composite materials, to meet different strength and flexibility requirements. The depth and width of the docking groove can be adjusted according to actual needs. For example, a deeper docking groove can be designed to increase the stability of the connection, or a wider docking groove can be designed to facilitate the insertion and removal of the protrusion 611. The size and shape of the protrusion 611 can also be adjusted accordingly to ensure a tight fit with the docking groove. In addition, a guide structure, such as a small pulley or a smooth guide surface, may be provided in the docking groove to ensure that the rope 52 is not subjected to excessive wear during movement; There are also multiple options for connecting the protrusion 611 and the rope 52. For example, a small hole or groove can be set on the protrusion 611 to fix one end of the rope 52 therein, or a detachable connection method such as a snap or threaded connection can be used to facilitate replacement and maintenance of the rope 52.

[0046] There are many options for the installation position of the spiral spring. For example, the spiral spring can be directly installed at the connection between the rotating shaft 51 and the rotating rod 5, or it can be installed through an intermediate connecting piece. The type and specifications of the spiral spring can be selected according to actual needs to ensure that appropriate torque is provided. The spiral spring's function isn't limited to securing the lug 611 within the docking slot; it also plays a crucial role throughout the entire winding process. Once the docking block 61 engages the hooking portion, the winding roller 2 causes the tensioning roller 6 to orbit, pulling the rope 52 out and accumulating elastic potential energy within the spiral spring. This design facilitates the removal of the rope 52, freeing the tensioning roller 6 from the rotating rod 5, allowing the tensioning roller 6 to orbit around the winding roller 2. In addition, the use of the scroll spring also gives the system a certain degree of adaptability. During use, since various components may experience wear or gap changes, the scroll spring can compensate for these changes to a certain extent and maintain a stable fit between the protrusion 611 and the docking groove, which not only improves the reliability of the equipment, but also extends its service life.

[0047] There are two docking mechanisms 7, which are respectively installed on the two winding rollers 2. The docking mechanism 7 includes two torque bearings 71, two ratchet rings 72, and two limit rings 73. The inner rings of the two torque bearings 71 are coaxially fixedly connected to the two ends of the winding roller 2, and the ratchet ring 72 is coaxially fixedly installed on the outer ring of the torque bearing 71. The limit ring 73 is coaxially fixedly arranged on the outside of the ratchet ring 72, and the radius of the limit ring 73 is larger than the outer circle radius of the ratchet ring 72. A hooking portion is formed between the ratchet teeth of the ratchet ring 72, and a hook claw 612 that can enter the hooking portion is provided on the docking block 61. When the hook claw 612 enters the hooking portion, the winding roller 2 rotates to rotate the torque bearing 71, thereby rotating the ratchet ring 72, and due to the tensioning roller 6 and the winding roller 2 attract each other, so the hook 612 carries the docking block 61 and the tensioning roller 6 to revolve around the winding roller 2. When the tensioning roller 6 rotates 250°, the rope 52 is completely released, and the inner and outer rings of the torque bearing 71 rotate relatively, so that the tensioning roller 6 remains in the front and upper part of the winding roller 2. At this time, under the action of the magnetic force, the winding roller 2 rotates counterclockwise to make the tensioning roller 6 rotate clockwise, so that the end of the film material is sent between the film material and the reel for winding and fixing. As the winding thickness of the film material on the reel increases, the tensioning roller 6 gradually moves away from the winding roller 2, so that the hook 612 gradually disengages from the ratchet. When it is completely disengaged, the spiral spring 53 releases the elastic potential energy to make the rope 52 pull the docking block 61 to reset, thereby resetting the tensioning roller 6.

[0048] The locking cam 73 is secured on both sides of the cam 72 and the engagement of the cam 73 with the engagement of the other ends of the cam 72. The locking cam 73 is secured on both sides of the cam 72 and the engagement of the cam 73 with the engagement of the other ends of the cam 72.

[0049] Specifically, when the hook 612 is inserted into the ratchet ring 72, the limit ring 73 first contacts the docking block 61, guiding the docking block 61 along the correct path into the ratchet ring 72. Because the radius of the limit ring 73 is larger than the outer radius of the ratchet ring 72, the docking block 61 is always constrained by the limit ring 73 during insertion, preventing it from lateral displacement. This design ensures that the hook 612 on the docking block 61 can accurately enter the hooking portion of the ratchet ring 72, thereby achieving a reliable hooking connection. Furthermore, the presence of the limit ring 73 prevents the docking block 61 from disengaging from the side of the ratchet during the revolution of the tensioning roller 6. When the tensioning roller 6 rotates around the axis of the winding roller 2, the docking block 61 may tend to move outward due to centrifugal force. However, the presence of the limit ring 73 forms a physical barrier, preventing lateral movement of the docking block 61, thereby ensuring the stability of the hooking connection.

[0050] Therefore, the technical solution of the present invention not only solves the problem of hooking and positioning, but also improves the stability and reliability of the entire winding process. Through precise hooking, it can ensure that the tensioning roller 6 always maintains the correct position during the winding process, thereby improving the winding quality of the membrane screen.

[0051] The specific workflow steps are as follows: Step 1: When the machine is just started, the end of the film material is passed around the winding drum and tension roller 6 in the front, and then the end of the film material is fixed to the reel on the rear winding roller 2 by bonding; Step 2: Start the motor to make the drive mechanism drive the two winding rollers 2 to rotate synchronously, thereby winding the film material; Step 3: After the film roll is rolled up to a certain extent, the cutting device 3 is activated to cut the film between the film roll and the tensioning roller 6; Step 4: The tensioning roller 6 rotates downward under the action of gravity, thereby causing the film to rotate downward until the tensioning roller 6 and the front winding roller 2 clamp the film. At this time, the magnetism between the tensioning roller 6 and the front winding roller 2 prevents the tensioning roller 6 from moving away from the winding roller 2. Step 5: While the tension roller 6 and the front winding roller 2 are clamping the film, the hook 612 engages with the ratchet ring 72, so that the docking block 61 and the tension roller 6 revolve around the winding roller 2; Step 6: When the tensioning roller 6 has rotated approximately 250°, the rope 52 is completely released, and the inner and outer rings of the torque bearing 71 rotate relative to each other, thereby keeping the tensioning roller 6 above and in front of the winding roller 2; Step 7: The winding roller 2 rotates by magnetism to cause the tension roller 6 to rotate, so that the end of the film material clamped between the two is transported in the rotation direction of the winding roller 2, so that the end of the film material is sent between the film material and the reel for winding and fixing; Step 8: As the thickness of the film material wound on the reel increases, the tension roller 6 gradually moves away from the winding roller 2, so that the hook 612 gradually disengages from the ratchet; Step 9: After the hook 612 is completely disengaged from the ratchet, the volute spring 53 releases its elastic potential energy to cause the rope 52 to pull the docking block 61 to reset, thereby resetting the tensioning roller 6; Step 10: Start the servo motor to rotate the rotating plate 41 180° counterclockwise, so that the two winding rollers 2 are swapped front and back, and the tensioning roller 6 is pressed on the film material between the two winding rollers 2 to provide tensioning force; Between steps 5 and 8, install the new roll on the rear winding roller 2; Steps 1 and 2 are the start-up preparation steps, and steps 3 to 10 are repeated in a cycle during continuous production.

[0052] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A film material screen winding device, comprising a frame (1) and two winding rollers (2), characterized in that: Also includes: A displacement device (4) for driving two winding rollers (2) to rotate synchronously along a circular trajectory for displacement, a rotating rod (5) rotatably mounted on a frame (1), a tensioning roller (6) and a docking mechanism (7), wherein a rotating shaft (51) is mounted on the rotating rod (5), two ropes (52) are wound around the rotating shaft (51), docking blocks (61) capable of docking with the bottom end of the rotating rod (5) are rotatably mounted at both ends of the tensioning roller (6), the two docking blocks (61) are respectively connected to the two ropes (52), the tensioning roller (6) and the winding roller (2) are magnetic, and there is an attraction force between the two, and the docking mechanism (7) comprises a torque bearing (71) mounted on the end of the winding roller (2), and a torque bearing (71) is provided on the outer ring thereof with a The hooking portion cooperates with the block (61). When the rear winding roller (2) is wound, the docking block (61) abuts against the rotating rod (5), and the tensioning roller (6) presses the film material between the two winding rollers (2). After the film material between the rear winding roller (2) and the tensioning roller (6) is cut, the tensioning roller (6) rotates downward with the end of the film material, so that the film material is clamped between the winding roller (2) and the tensioning roller (6). The docking block (61) is hooked with the hooking portion, the rope (52) is released, and the tensioning roller (6) rotates around the axis of the winding roller (2) until it reaches the front and upper part of the winding roller (2). As the film material on the winding roller (2) becomes thicker, the docking block (61) is separated from the abutting portion, the rope (52) is retracted and the tensioning roller (6) is reset, and the two winding rollers (2) are swapped front and back.

2. The film screen winding device according to claim 1, characterized in that: The displacement device (4) comprises a rotating plate (41) whose middle portion is rotatably mounted on the frame (1); two winding rollers (2) are rotatably mounted on two ends of the rotating plate (41); and a driving device (42) for driving the two winding rollers (2) to rotate is mounted on the rotating plate (41).

3. The film screen winding device according to claim 2, characterized in that: The driving device (42) comprises a motor fixedly mounted on the rotating plate (41), the output end of the motor being coaxially connected to one of the winding rollers (2), and a synchronizing mechanism for causing the two winding rollers (2) to rotate synchronously is installed between the two winding rollers (2).

4. The film screen winding device according to claim 1, characterized in that: The bottom end of the rotating rod (5) is provided with a docking groove, and the docking block (61) is provided with a protrusion (611) adapted to the docking groove, and the rope (52) passes through the docking groove and is connected to the protrusion (611).

5. The film screen winding device according to claim 4, characterized in that: The winding roller (2) is composed of a main shaft and a plurality of arc-shaped strips arranged in a circular array around the main shaft. A driving member is mounted on the main shaft for controlling the arc-shaped strips to synchronously move away from or approach the main shaft. When a reel is removed from or put on the winding roller (2), the driving member causes the arc-shaped strips to move closer to the main shaft, and the winding roller (2) becomes thinner.

6. The film screen winding device according to claim 5, characterized in that: On the front projection plane, the rope (52) is located between two vertical lines passing through the two ends of the arc strip respectively.

7. The film screen winding device according to claim 5, characterized in that: The arc-shaped strip is made of magnetic conductive material, and the outer surface of the tensioning roller (6) is provided with a magnetic layer.

8. The film screen winding device according to claim 5, characterized in that: A volute spring (53) is installed between the rotating shaft (51) and the rotating rod (5), and the volute spring (53) is used to apply a torsional force to the rotating shaft (51), thereby causing the protrusion (611) to enter the docking groove.

9. The film screen winding device according to claim 8, characterized in that: The docking mechanism (7) further comprises a ratchet ring (72), a hooking portion is formed between ratchet teeth of the ratchet ring (72), the ratchet ring (72) is coaxially fixedly connected to the outer ring of the torque bearing (71), and a hook claw (612) capable of entering the hooking portion is provided on the docking block (61).

10. The film screen winding device according to claim 9, characterized in that: A limiting ring (73) is fixedly arranged on one side of the ratchet ring (72) away from the middle of the winding roller (2), and the radius of the limiting ring (73) is greater than the outer circle radius of the ratchet ring (72).

Images