Buckling device for film roll packaging

Abstract

The invention discloses a buckling device for film roll packaging, which comprises a buckling device rack, two ends of the buckling device rack in the length direction are respectively provided with a holding and clamping mechanism, and the holding and clamping mechanisms can move along the length direction of the buckling device rack; a strip winding mechanism is arranged on each holding and clamping mechanism; a film roll lifting mechanism is arranged in the middle of the buckling device rack in the length direction; each holding and clamping mechanism comprises a mounting disc, a rotating disc and a plurality of clamping jaws; the multiple clamping jaws are distributed on the installation disc in the circumferential direction, and the clamping jaws are slidably connected with the installation disc. The turntable is parallel to the mounting disc and can rotate around the middle axis of the mounting disc; a plurality of guide grooves are formed in the rotary disc and are in sliding fit with the clamping jaws in a one-to-one correspondence mode. The problem that the moving stroke of the clamping jaw is limited due to size interference of mechanical transmission structures such as a connecting rod is fundamentally solved, film rolls large in diameter and small in diameter can be packaged through one buckling device, and the application range is widened.

Description

Technical Field

[0001] This invention belongs to the technical field of film packaging equipment, specifically relating to a fastening device for film roll packaging. Background Technology

[0002] In some current film roll packaging processes, fastening devices are used to protect the two ends of the film roll. A relevant prior art example is the Chinese utility model patent with authorization publication number CN216805951U. This involves supporting the film roll using a film roll lifting mechanism (roll support device) and raising and lowering it to the desired height. This height position aligns the central core of the film roll with the clamping mechanisms on both sides. A decorative plate (or paper cover) is then placed at the end of the roll and secured with adhesive tape. Optionally, a plug can also be inserted at the end of the core.

[0003] One of the key aspects of the clamping mechanism lies in the movement control structure of the jaws on the shrink disc. Existing technologies use linkage control, but the width of the linkages themselves causes interference and obstruction between adjacent linkages when the jaws are retracted. This limits the jaws' retraction stroke, preventing them from retracting very close to the center of the shrink disc. While a single clamping mechanism can package rolls of different diameters by changing different jaws and retraction ranges, the aforementioned stroke limitation means that a single machine cannot package rolls with smaller diameters that exceed the jaws' retraction range. In such cases, a smaller machine or manual packaging is required, impacting production costs and efficiency.

[0004] Furthermore, the membrane roll lifting mechanism needs to raise the membrane roll to different heights based on different sizes, and be adjustable to ensure that the height positions of both ends of the membrane roll are aligned. Existing technical solutions have complex structures and numerous components. Although they can achieve the required functions, the installation and maintenance of the equipment are time-consuming and labor-intensive.

[0005] Therefore, a new optimization and improvement scheme for the fastening device is needed to further reduce costs, increase efficiency, and improve economic benefits. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a fastening device for film roll packaging, which solves the problem that the existing devices have a narrow range of applicability to film roll sizes, and enables film rolls with both large and small diameters to be packaged by a single device.

[0007] According to the technical solution of the present invention, the present invention provides a fastening device for film roll packaging, including a fastening device frame, a clamping mechanism at each end of the fastening device frame along its length, the clamping mechanism being movable along the length of the fastening device frame; a wrapping mechanism is provided on each clamping mechanism; a film roll lifting mechanism is provided in the middle of the fastening device frame along its length; each clamping mechanism includes a mounting plate, a turntable, and multiple claws; the multiple claws are circumferentially distributed on the mounting plate, the claws are slidably connected to the mounting plate, and the direction in which the claws can slide on the mounting plate is from the outer periphery to the center of the mounting plate; the turntable is arranged parallel to the mounting plate, and the turntable is rotatable around the central axis of the mounting plate; the turntable is provided with multiple guide grooves, the guide grooves and the claws slidingly corresponding to each other; each guide groove forms a guide path, the guide path being straight, arc-shaped, S-shaped, or irregular in shape, the length of the guide path being from the outer periphery to the center of the mounting plate, and the guide path being relatively curved or inclined to the direction in which the claws can slide on the mounting plate.

[0008] In some embodiments, the claws can slide radially on the mounting plate; the guide paths of the guide grooves are curved relative to the radial direction, and the curvature direction of the guide paths of each guide groove is consistent.

[0009] In some embodiments, the guide path of the guide groove is arc-shaped; one end of the guide groove near the center of the turntable is inclined in a clockwise or counterclockwise direction away from the radial direction, and in the direction from the center of the turntable to the periphery, the guide groove continues to bend in a clockwise or counterclockwise direction away from the radial direction.

[0010] In some embodiments, the mounting plate is provided with a sliding groove, and the claws are slidably connected to the sliding groove in a one-to-one correspondence; it also includes a fixed base, and the mounting plate is fixed to the fixed base; the claws include a connecting plate and a claw rod, the plate is located on the side of the mounting plate and turntable away from the fixed base, and the claw rod extends toward the fixed base and the length direction of the claw rod is perpendicular to the mounting plate; a roller part and a guide part are distributed along the length direction of the claw rod, and the roller part and the guide part are slidably connected to the sliding groove and the guide groove respectively.

[0011] In some embodiments, the roller portion includes two rows of rollers corresponding to the two side edges of the groove, and the middle part of the roller is recessed relative to the two ends of the roller, and the middle part of the roller contacts the edge of the groove.

[0012] In some embodiments, the turntable is located between the mounting plate and the fixed base, and the mounting plate is fixedly mounted to the fixed base at its edge; a turntable drive motor is connected to the turntable on the side away from the mounting plate; a protruding central column is provided in the middle of the mounting plate on the side away from the fixed base; the clamping plate and the clamping claw rod are detachably connected.

[0013] In some embodiments, the film roll lifting mechanism includes a vertically arranged back plate, with multiple electric cylinders arranged side by side on the front side of the back plate. The electric cylinder motors and cylinder barrels of the electric cylinders are fixed to the back plate, and the piston rods of the electric cylinders face upward. A support plate is connected to the upper end of the piston rod of each electric cylinder, and the multiple support plates are adjacent and aligned.

[0014] In some embodiments, a motor mount is provided on the lower part of the front side of the back plate, and the electric cylinder motor is fixedly mounted on the motor mount; an annular seat is installed on the upper part of the front side of the back plate, and the annular seat has a vertically penetrating annular hole, which corresponds one-to-one with the cylinder barrel, and the annular hole is fitted onto the outside of the cylinder barrel in a matching manner.

[0015] In some embodiments, the back plate has back plate mounting portions on both the left and right sides for mounting and connecting with the fastening device frame.

[0016] In some embodiments, each tray includes a mounting block and a support block, the mounting block being fixedly connected to the piston rod, and the support block being detachably mounted above the mounting block, the upper surface of the support block being a recessed support surface.

[0017] Compared with the prior art, the beneficial technical effects of the present invention are as follows: This invention provides a fastening device for film roll packaging. The clamping mechanism innovatively employs a turntable with guide grooves. The mounting plate restricts the jaws to only retracting and opening movements. Simultaneously, the jaws slide in conjunction with the guide grooves. The guide path of the guide grooves is designed so that when the turntable rotates, the edge of the guide groove pushes the jaws to retract or open. In this solution, the jaws are limited and guided by the guide grooves, eliminating the need for any mechanical transmission structure behind the jaws. This fundamentally avoids the problem of jaw movement being limited by interference from mechanical transmission structures such as connecting rods. In the retracted state, the jaws can approach the center of the mounting plate more closely, restricting a smaller circular area, thus enabling the packaging of rolls with smaller diameters and broadening the applicability of the fastening device. For the film roll lifting mechanism, an innovative approach uses electric cylinders to control the lifting of the pallet. Multiple electric cylinders are mounted on a single back plate. Utilizing the guiding action of the cylinder barrel and piston rod, additional linear guide rail assemblies are eliminated. The overall component structure and installation process are simplified, significantly reducing the difficulty and time required for assembly and maintenance, resulting in significant economic benefits. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the fastening device provided by the present invention.

[0019] Figure 2 yes Figure 1 A three-dimensional structural diagram of the clamping mechanism in the image.

[0020] Figure 3 yes Figure 1 Exploded view of the clamping mechanism in the image.

[0021] Figure 4 This is a structural schematic diagram of the shape and distribution of the guide grooves according to a preferred embodiment of the present invention.

[0022] Figure 5 yes Figure 3 A magnified view of the claw part in the image.

[0023] Figure 6 This is a schematic diagram of the structure of the claw part provided by the present invention after it is assembled with the mounting plate.

[0024] Figure 7 This is a partial cross-sectional schematic diagram of the clamping mechanism provided by the present invention.

[0025] Figure 8 This is a longitudinal cross-sectional view of the clamping mechanism provided by the present invention.

[0026] Figure 9 yes Figure 1 A three-dimensional structural diagram of the membrane roll lifting mechanism.

[0027] Explanation of reference numerals in the attached figures: 100. Fastening device frame; 200. Clamping mechanism; 201. Mounting plate; 202. Turntable; 203. Claw; 204. Guide groove; 205. Slide groove; 206. Fixed seat; 207. Clamping plate; 208. Claw rod; 209. Roller section; 210. Guide section; 211. Turntable drive motor; 212. Central column; 300. Winding mechanism; 400. Membrane roll lifting mechanism; 401. Back plate; 402. Electric cylinder; 403. Electric cylinder motor; 404. Cylinder barrel; 405. Piston rod; 406. Support plate; 407. Motor base; 408. Annular seat; 409. Back plate mounting section; 410. Mounting block; 411. Support block; 500. Membrane roll. Detailed Implementation

[0028] This invention provides a fastening device for film roll packaging, which solves the problem that existing devices have a narrow applicable range for film roll sizes, and enables the packaging of film rolls with both large and small diameters using a single device.

[0029] Please see Figure 1This invention discloses a fastening device for film roll packaging, comprising a fastening device frame 100, with a clamping mechanism 200 at each end of the frame 100 along its length. The clamping mechanisms 200 are movable along the length of the frame 100; for example, the clamping mechanisms 200 are connected to the frame 100 via a slide rail assembly and are connected to a corresponding drive control assembly to control their movement. The two clamping mechanisms 200 can move synchronously toward the center of the frame 100 along its length, or move synchronously away from it in the opposite direction. Each clamping mechanism 200 is provided with a tape winding mechanism 300 for winding adhesive tape. A film roll lifting mechanism 400 is provided at the center of the frame 100 along its length for supporting and lifting the film roll 500.

[0030] One of the main improvements of this invention is the optimization of the clamping mechanism, which solves the problem of limited claw stroke caused by the connecting rod in the existing solution, and achieves a larger claw retraction range, thereby increasing the applicability of the clamping mechanism and enabling it to package both large and small diameter rolls.

[0031] Please see Figures 2 to 8 Each clamping mechanism 200 includes a mounting plate 201, a turntable 202, and multiple clamping claws 203. The multiple clamping claws 203 are circumferentially distributed on the mounting plate 201, thereby collectively constraining a circle corresponding to the roll material and the pattern plate. The clamping claws 203 are slidably connected to the mounting plate 201, and the direction in which the clamping claws 203 slide on the mounting plate 201 is from the periphery to the center; this direction is intended to describe the structure of the sliding path and does not limit the clamping claws 203 to only sliding from the periphery to the center; in other words, the multiple clamping claws 203 can retract towards the center and open outwards on the mounting plate 201.

[0032] The turntable 202 and the mounting plate 201 are arranged parallel to each other, one in front of the other, without restriction on which component is in front. The turntable 202 can rotate around the central axis of the mounting plate 201. As a supplement, the turntable 202 rotates in its own plane, and the axis of rotation lies on the central axis, which is an imaginary reference line and does not necessarily correspond to a physical axis. This description is intended to define the positional relationship and the rotational manner of the turntable 202 and the mounting plate 201. For the structure of the illustrated embodiment, it can be said that the circular turntable 202 and the circular mounting plate 201 are concentric. However, it is conceivable that the outer edge contours of the turntable 202 and the mounting plate 201 can also be other shapes besides circles.

[0033] The turntable 202 is provided with multiple guide grooves 204, which slide in a one-to-one correspondence with the claws 203. Each guide groove 204 forms a guide path, which can be straight, curved, S-shaped, or irregular in shape. The length direction of the guide path is from the outer periphery to the center of the mounting plate 201, and the guide path is relatively curved or inclined to the direction in which the claws 203 can slide on the mounting plate 201. This causes the edge of the guide groove 204 to be inclined relative to the retraction / opening direction of the claw 203 on the mounting plate 201; the inclination means that it is not coincident (the included angle is 0°), but there is a sufficiently large non-zero included angle, including vertical (the included angle is 90°); thus, when the turntable 202 rotates, the edge of the guide groove 204 can push the claw 203 to move, and the claw 203 will slide on both the mounting plate 201 and the turntable 202 at the same time. With the mounting plate 201 (or the turntable 202) as a fixed reference, the claw 203 is performing the retraction or opening action.

[0034] Specifically, for example, the chuck 203 slides radially on the mounting plate 201, or in other words, the sliding path of the chuck 203 on the mounting plate 201 is radial. The guide path of the guide groove 204 is curved relative to the radial direction, and the edge of the guide groove 204 with the curved path forms the required inclination between it and the radial path of the chuck 203 on the mounting plate 201. The curvature direction of the guide paths of each guide groove 204 is consistent, so that when the turntable 202 rotates, all the chucks 203 retract (or open) synchronously.

[0035] The guide path of the guide groove 204 can be designed into any desired shape, for example, by taking points through experiments or simulations and then connecting them to form a smooth curve. In some embodiments, the guide path of the guide groove 204 is straight, which is only relatively inclined to the direction in which the claw 203 can slide on the mounting plate 201, without any relative curvature. Generally, the multiple guide grooves 204 are generally a vortex-like structure formed by tilting and twisting relative to the radial lines. Generally, the multiple claws 203 are circumferentially evenly distributed, and the multiple sliding paths of the multiple claws 203 on the mounting plate 201 and the multiple guide grooves 204 are also circumferentially evenly distributed. The shapes of each guide groove 204 are the same, only their angular positions on the turntable 202 are different. For example, there are 10 guide grooves 204 in total, and the angular positions of adjacent guide grooves 204 differ by 36°.

[0036] In a preferred embodiment, the guide path of the guide groove 204 is arc-shaped; arc-shaped refers to a smooth curve similar to an arc, and is not limited to a strictly defined arc. One end of the guide groove 204 near the center of the turntable 202 is inclined clockwise or counterclockwise away from the radial direction, and in the direction from the center of the turntable 202 to the periphery, the guide groove 204 continues to bend clockwise or counterclockwise, gradually deviating from the radial direction. Please refer to... Figure 4Taking the guide groove 204 indicated therein as an example, its end near the center of the turntable 202 (the inner end of the guide groove 204) is inclined clockwise away from the radial reference line shown by the dotted line (this dotted line is the line connecting the inner end of the guide groove 204 and the center of the turntable 202). Assuming that this dotted line is the sliding path of the pawl 203 on the mounting plate 201 and that the pawl 203 is located at the inner end of the guide groove 204, then when the turntable 202 rotates counterclockwise relative to the mounting plate, the lower edge of the guide groove 204 will push the pawl 203 upward. Further assuming that after relative rotation, with the turntable 202 as a fixed reference, the sliding path shown by the dotted line rotates to the position of the dotted line on the right, and there is still a sufficient angle of inclination between the dotted line and the guide groove 204, so that the pawl 203 can be continuously and smoothly pushed to move. The process of the pawl 203 retracting is the same as the process of opening. Furthermore, based on the above analysis, it is evident that the curved guide groove 204 is superior to the straight one. If it is straight, the further out the claw 203 is, the smaller the inclination angle of the wire path, making it more difficult to move the claw 203. In addition, the strength factor of the turntable 202 must also be considered; the spacing between the guide grooves 204 should not be too small. The curved guide groove 204 can simultaneously ensure both spacing and stroke.

[0037] The mounting plate 201 is used to restrict the claws 203 to only retract or open. For example, the mounting plate 201 is provided with a groove 205, and the claws 203 are slidably connected to the grooves 205 in a one-to-one correspondence. The shape of the groove 205 is used to restrict the sliding direction of the claws 203 on the mounting plate 201. Preferably, the claws 203 have a roller portion that cooperates with the edge of the groove 205, thereby reducing the frictional resistance of sliding. It is conceivable that the present invention is not limited to this. Based on the prior art, there are many other ways to restrict the movement direction of the claws 203, such as using a transmission chain or a spring for traction.

[0038] More specifically, the clamping mechanism also includes a fixed base 206, to which the mounting plate 201 is fixed. Generally, during the packaging process, the turntable 202 rotates to control the gripper 203, while the fixed base 206 and the mounting plate 201 remain stationary. The gripper 203 includes a gripping plate 207 and a gripper rod 208 connected together. The gripping plate 207 is located on the side of the mounting plate 201 and the turntable 202 away from the fixed base 206. The gripping plate 207 generally has an arc-shaped surface to fold and conform to the petals of the flower plate. The gripper rod 208 extends toward the fixed base 206 and its length direction is perpendicular to the mounting plate 201. Roller portions 209 and guide portions 210 are distributed along the length direction of the gripper rod 208. The roller portions 209 and guide portions 210 are slidably connected to the slide groove 205 and guide groove 204 respectively; "corresponding" means that the positions are corresponding and the structures are matched. In the illustrated embodiment, the mounting plate 201 is located on the front side (away from the fixing base 206), and the turntable 202 is located on the rear side (close to the fixing base 206). The roller portion 209 is located on the front side of the guide portion 210. It is conceivable that with the turntable 202 on the front side and the mounting plate 201 on the rear side, the guide portion 210 is located on the front side of the roller portion 209, which can also achieve the required function. Of course, the card plate 207 is always at the front and exposed to complete the required packaging action.

[0039] Generally, the gripper 203 is a replaceable component. Preferably, the gripper plate 207 and the gripper rod 208 are detachably connected; in other words, the gripper plate 207 on the front side of the gripper 203 is a replaceable component. Specific detachable connection methods include forming a mounting groove at the rear end of the gripper plate 207, allowing it to be fitted onto the front end of the gripper rod 208, and then positioned using screws; alternatively, other screw mounting methods, plug-in connections, snap-fit ​​connections, threaded connections, etc., can also be used. Different models of gripper plates 207 have different lengths and corresponding radius dimensions, thus allowing for the replacement of the gripper plate 207 (or gripper 203) to adapt to different packaging size requirements.

[0040] Furthermore, the roller section 209 includes two rows of rollers (e.g., four rollers in total) corresponding to the two side edges of the slide groove 205, and the middle of the roller is recessed relative to the two ends of the roller (in the shape of an hourglass). The middle of the roller contacts the edge of the slide groove 205 to limit the claw 203 in a direction perpendicular to the plane of the mounting plate 201, and at the same time act as a slider and a locking block, so that the claw 203 cannot move relative to the mounting plate 201 in the front-back direction, and ensures that the claw 203 slides stably and the locking plate 207 always faces the center.

[0041] The guide portion 210 may be, for example, a guide post, or have a roller or bearing structure, and may be coated with lubricating oil to ensure smooth guiding and low friction. It is conceivable that if the mounting plate 201 does not limit the claw 203 in the front-back direction, the guide portion 210 or other components will perform the limiting function to ensure the guiding effect.

[0042] Preferably, such as Figure 3 , Figure 8 In the illustrated embodiment, the turntable 202 is located between the mounting plate 201 and the fixed base 206, with the mounting plate 201 fixedly mounted to the fixed base 206 at its edge; a turntable drive motor 211 is connected to the turntable 202 on the side furthest from the mounting plate 201. This arrangement of the turntable drive motor 211 does not affect the movement of the chuck 203 and achieves the most compact spatial layout. More specifically, the turntable drive motor 211 is connected to a reducer and a disc-shaped connecting structure, thereby connecting to the turntable 202.

[0043] Furthermore, the mounting base 206 is box-shaped, including a connected back plate and sides, with the sides extending from the edge of the back plate towards the mounting plate 201. The turntable 202 is housed within the box-shaped mounting base 206, and the mounting plate 201 matches and covers the box-shaped mounting base 206. Naturally, the size of the turntable 202 is smaller than the mounting plate 201 and the area where the mounting plate 201 connects to the mounting base 206, ensuring unimpeded rotation of the turntable 202. This design protects the turntable 202, preventing dust and debris from entering the guide groove 204, thereby ensuring smooth and stable packaging operations.

[0044] Furthermore, a protruding center post 212 is provided in the middle of the mounting plate 201 on the side away from the fixing base 206. The center post 212 is, for example, an air chuck, but is not limited thereto. As needed, the center post 212 can be used to support the roll mandrel and to install plugs into the roll mandrel, etc.

[0045] In summary, the clamping mechanism for roll packaging of the present invention abandons the existing linkage transmission method and innovatively adopts a turntable with guide grooves. The mounting plate restricts the jaws to only retracting and opening movements, while the jaws also slide in cooperation with the guide grooves. The guide path of the guide grooves is designed so that when the turntable rotates, the edge of the guide grooves pushes the jaws to retract or open. In this solution, the jaws are limited and guided by the guide grooves, and no mechanical transmission structure is required on the rear side of the jaws. This fundamentally avoids the problem of limiting the jaw movement stroke due to the size interference of mechanical transmission structures, resulting in a narrow range of retractable sizes and application range of the jaws. In the retracted state, the jaws can get closer to the center of the mounting plate and restrict a smaller circular area, which means that it is possible to package rolls with smaller diameters.

[0046] This invention also proposes an optimization of the film roll lifting mechanism. Existing technologies related to film roll lifting mechanisms (or roll support devices, film roll holding devices), such as the Chinese utility model patent with authorization announcement number CN216806548U, involve complex structures and numerous components (approximately 100 parts), making equipment installation and maintenance time-consuming and labor-intensive. The preferred film roll lifting mechanism of this invention significantly simplifies its structure and reduces the number of components while ensuring the required functions. It should be noted that the use of a motor-driven electric cylinder is a control method that has emerged in recent years and has gradually reached a level capable of precise and complex control, while also reducing costs. Currently, commercially available film roll packaging equipment still uses the complex inter-component linkage and limiting structure described in the background section of this paper, involving slide rail assemblies, connecting frames, etc. Therefore, this invention proposes a preferred solution.

[0047] Please see Figure 9 The film roll lifting mechanism 400 includes a vertically arranged back plate 401. Multiple electric cylinders 402 are arranged side-by-side adjacent to each other on the front side of the back plate 401. The electric cylinders 402 are existing structures and can be either existing products or structures capable of achieving the required telescopic (lifting) function. They include nested cylinder barrels 404 and piston rods 405, with the piston rods 405 being driven to extend and retract via an electric cylinder motor 403. The electric cylinder motor 403 and cylinder barrels 404 of the electric cylinders 402 are both fixedly mounted to the back plate 401. The piston rods 405 of the electric cylinders 402 face upwards, and a support plate 406 is connected to the upper end of the piston rod 405 of each electric cylinder 402, allowing the multiple support plates 406 to be individually controlled to lift and lower. Multiple trays 406 are adjacent and aligned. Adjacent means that the multiple trays 406 are in a row adjacent to each other in the left and right direction. Aligned means that the multiple trays 406 are relatively aligned in the left and right direction and in the front and back direction. The multiple trays 406 can be raised to the same height position to form a linear row of trays to jointly contact and support the same film roll.

[0048] More specifically, a motor mount 407 is provided on the lower front side of the backplate 401, and the electric cylinder motor 403 is mounted and fixed to the motor mount 407. The motor mount 407 can be, for example, as shown below. Figure 9The multiple individual structures shown can also have multiple mounting positions on a single base plate. The electric cylinder motor 403 is, for example, mounted and fixed to the motor mount 407 using screws. An annular seat 408 is mounted on the upper front side of the back plate 401. The annular seat 408 has a vertically penetrating annular hole, which corresponds one-to-one with the cylinder 404, fitting snugly around the cylinder 404. The annular seat 408 is mounted and fixed on the side near the back plate 401, for example, using screws, plug-in connections, or snap-fit ​​connections. The annular seat 408 positions the cylinder 404, stably limiting the extension and retraction direction of the electric cylinder 402 to the vertical direction. The annular seat 408 and the motor mount 407 are located at two points, one vertical and one horizontal. This method of fixing the electric cylinder 402 facilitates installation and ensures stability.

[0049] Please also refer to Figure 1 The back plate 401 has mounting portions 409 on both the left and right sides for mounting and connecting with the fastening device frame 100. The fastening device frame 100 has mounting spaces at corresponding positions that match the film roll lifting mechanism. The mounting portions 409 have bolt holes, for example, allowing for bolt connection and fixation to the fastening device frame 100, facilitating installation, disassembly, and maintenance. The mounting portions 409 are located at both ends, aligning with the arrangement direction of the support plates 406 and the length direction of the supported film roll 500. This facilitates fine-tuning of the horizontal level of the film roll lifting mechanism 400. For example, shims can be placed between the mounting portions 409 and the fastening device frame 100 to ensure the horizontal level of the support plates 406 and to align the height of both ends of the film roll, ensuring smooth fastening and packaging.

[0050] The upper surface of the support plate 406 is a recessed support surface to facilitate stable support of the membrane roll and prevent the membrane roll from rolling. More preferably, each support plate 406 includes a mounting block 410 and a support block 411. The mounting block 410 is fixedly connected to the piston rod 405, and the support block 411 is detachably mounted above the mounting block 410. The upper surface of the support block 411 is a recessed support surface; thus, the recessed shape of the support surface can be changed by replacing the support block 411 to adapt to membrane rolls of different diameters. The detachable mounting connection method of the support block 411 is, for example, to fix it to the mounting block 410 with screws on both sides of the recessed support surface of the support block 411, so that the screws and screw holes do not contact the membrane roll; or the bottom of the support block 411 is connected to the mounting block 410 by a matching plug-in or snap-fit ​​method.

[0051] The number of pallets 406 is preferably five, with one located in the middle and two symmetrically arranged on its left and right sides. Practice has shown that this distribution of pallets 406 can achieve the best effect, and the number of pallets 406 is not too large and the production cost is appropriate.

[0052] As a supplementary explanation, all electric cylinders 402 are connected to a control system, or one or more electric cylinders 402 are connected to a control system, which can be set and controlled as needed to achieve the required lifting function.

[0053] In summary, the membrane roll lifting mechanism of the present invention abandons the original complex mechanical structure and uses electric cylinders to control the lifting of the pallet one by one. Multiple electric cylinders are installed as a whole on a back plate. The guiding effect of the cylinder barrel and piston rod of the electric cylinder itself eliminates the need for additional linear slide rail components. The overall component structure and installation process are simple, which greatly reduces the difficulty and time of assembly and maintenance, and the economic benefits are significant.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; obviously, the described embodiments are some embodiments of the present invention, but not all embodiments; based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention; in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other; modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions for some of the technical features, do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fastening device for film roll packaging, characterized in that, The device includes a fastening device frame (100), with a clamping mechanism (200) at each end of the fastening device frame (100) along its length. The clamping mechanism (200) is movable along the length of the fastening device frame (100). Each clamping mechanism (200) is equipped with a winding mechanism (300). A film roll lifting mechanism (400) is provided in the middle of the fastening device frame (100) along its length. Each clamping mechanism (200) includes a mounting plate (201), a turntable (202), and multiple jaws (203); the multiple jaws (203) are circumferentially distributed on the mounting plate (201), and the jaws (203) are slidably connected to the mounting plate (201). The direction in which the jaws (203) can slide on the mounting plate (201) is from the outer periphery to the center of the mounting plate (201); the turntable (202) is arranged parallel to the mounting plate (201), and the turntable (202) can rotate around the mounting plate. The central axis of the disk (201) rotates; multiple guide grooves (204) are provided on the turntable (202), and the guide grooves (204) and the claws (203) slide in a one-to-one correspondence; each guide groove (204) forms a guide path, which is straight, arc-shaped, S-shaped or irregular in shape, and the length direction of the guide path is from the outer periphery of the mounting disk (201) to the middle, and the guide path is relatively curved or inclined to the direction in which the claws (203) can slide on the mounting disk (201).

2. The fastening device for film roll packaging according to claim 1, characterized in that, The claw (203) can slide radially on the mounting plate (201); the guide path of the guide groove (204) is curved relative to the radial direction, and the curvature direction of the guide path of each guide groove (204) is consistent.

3. The fastening device for film roll packaging according to claim 2, characterized in that, The guide path of the guide groove (204) is arc-shaped; the end of the guide groove (204) near the middle of the turntable (202) is inclined in a clockwise or counterclockwise direction to deviate from the radial direction, and in the direction from the middle of the turntable (202) to the periphery, the guide groove (204) continues to bend in a clockwise or counterclockwise direction to gradually deviate from the radial direction.

4. The fastening device for film roll packaging according to claim 1, characterized in that, The mounting plate (201) is provided with a sliding groove (205), and the claws (203) are slidably connected to the sliding groove (205) in a one-to-one correspondence; it also includes a fixed seat (206), and the mounting plate (201) is fixed to the fixed seat (206); the claws (203) include a connecting plate (207) and a claw rod (208), the plate (207) is located on the side of the mounting plate (201) and the turntable (202) away from the fixed seat (206), and the claw rod (208) extends toward the fixed seat (206) and the length direction of the claw rod (208) is perpendicular to the mounting plate (201); a roller part (209) and a guide part (210) are distributed along the length direction of the claw rod (208), and the roller part (209) and the guide part (210) are slidably connected to the sliding groove (205) and the guide groove (204) respectively.

5. The fastening device for film roll packaging according to claim 4, characterized in that, The roller section (209) includes two rows of rollers corresponding to the two side edges of the groove (205), and the middle part of the roller is recessed relative to the two ends of the roller, and the middle part of the roller is in contact with the edge of the groove (205).

6. The fastening device for film roll packaging according to claim 4, characterized in that, The turntable (202) is located between the mounting plate (201) and the fixed base (206). The mounting plate (201) is fixed to the fixed base (206) at its edge. The turntable (202) is connected to the turntable drive motor (211) on the side away from the mounting plate (201). A protruding central column (212) is provided in the middle of the mounting plate (201) on the side away from the fixed base (206). The clamping plate (207) and the clamping claw rod (208) are detachably connected.

7. The fastening device for film roll packaging according to any one of claims 1 to 6, characterized in that, The membrane roll lifting mechanism (400) includes a vertically arranged back plate (401). Multiple electric cylinders (402) are arranged on the front side of the back plate (401). The multiple electric cylinders (402) are arranged side by side adjacent to each other. The electric cylinder motor (403) and cylinder barrel (404) of the electric cylinder (402) are fixed to the back plate (401). The piston rod (405) of the electric cylinder (402) faces upward. A support plate (406) is connected to the upper end of the piston rod (405) of each electric cylinder (402). The multiple support plates (406) are adjacent and aligned.

8. The fastening device for film roll packaging according to claim 7, characterized in that, A motor mount (407) is provided on the lower front side of the back plate (401), and the electric cylinder motor (403) is fixedly installed on the motor mount (407); an annular seat (408) is installed on the upper front side of the back plate (401), and the annular seat (408) has a vertically penetrating annular hole, which corresponds one-to-one with the cylinder (404), and the annular hole is fitted onto the outside of the cylinder (404) in a matching manner.

9. The fastening device for film roll packaging according to claim 7, characterized in that, The back plate (401) has a back plate mounting part (409) on both the left and right sides for mounting and connecting with the fastening device frame (100).

10. The fastening device for film roll packaging according to claim 7, characterized in that, Each tray (406) includes a mounting block (410) and a support block (411). The mounting block (410) is fixedly connected to the piston rod (405), and the support block (411) is detachably mounted on top of the mounting block (410). The upper surface of the support block (411) is a recessed support surface.

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