Cloth feeding device for circular knitting machine and use method of cloth feeding device

Abstract

The invention discloses a cloth discharging device for a circular weft knitting machine and a using method thereof, and belongs to the field of textile machinery. The cloth discharging device comprises a conveying platform, and a mechanical arm clamping jaw assembly, a shearing assembly and a containing groove formed in the front side of the shearing assembly and used for containing an empty rod core are arranged on the conveying platform; the rear side of the shearing assembly is provided with a temporary storage position used for containing a finished cloth roll. The shearing assembly comprises a sinking U-shaped plate, the sinking U-shaped plate is fixedly installed below the conveying platform, a first stroke sliding rail is fixedly arranged in the sinking U-shaped plate, a second stroke sliding rail is installed on the first stroke sliding rail in a sliding mode, and a shear assembly is installed on the second stroke sliding rail in a sliding mode.

Description

Technical Field

[0001] The present invention relates to the field of textile machinery, and particularly to a cloth discharging device for a circular weft knitting machine and its usage method. Background Art

[0002] During the fabric weaving process of the existing circular weft knitting machine, when the cloth roller is full of fabric, manual intervention is required to complete operations such as opening the door, fabric cutting, cloth roller transportation, and loading an empty roller. This traditional workflow has the following problems: Firstly, the working process is cumbersome, requiring multiple manual operation steps, including opening the door, cutting, transportation, and loading the roller. Each step requires manual participation, increasing the complexity of the operation and the possibility of errors. Secondly, the efficiency is low. Each step requires manual operation, which takes a long time and cannot achieve continuous and efficient production, affecting the overall production efficiency. In addition, the working intensity is high, requiring manual handling of heavy objects (cloth rollers), which places high physical requirements on workers. Long-term engagement in such work is likely to cause worker fatigue and health problems. The root cause of these problems lies in the lack of automated equipment throughout the process, making it impossible to achieve continuous and efficient production. In view of the above problems, the existing technology urgently needs to be improved. Summary of the Invention

[0003] In order to overcome the defects of the prior art, the technical problem to be solved by the present invention is to provide a cloth discharging device for a circular weft knitting machine and its usage method, which has the advantages of high automation degree, improved efficiency, and reduced manual labor intensity.

[0004] The present application provides a cloth discharging device for a circular weft knitting machine, and the technical solution is as follows: It includes a transportation platform, on which a robotic arm gripper assembly, a shearing assembly, and a placement groove for placing an empty rod core are provided in front of the shearing assembly; a buffer position for placing a finished cloth roll is provided behind the shearing assembly; the shearing assembly includes a sunken U-shaped plate fixedly installed below the transportation platform, a first stroke slide rail is fixedly arranged inside the sunken U-shaped plate, a second stroke slide rail is slidably installed on the first stroke slide rail, and a scissor assembly is slidably installed on the second stroke slide rail.

[0005] Further, the present application also provides that the scissor assembly includes a scissor support slidably installed on the second stroke slide rail, a blade fixing plate is fixedly installed on the scissor support, and a blade is installed on the blade fixing plate.

[0006] Further, the present application also provides that the robotic arm gripper assembly includes a rubbing wheel assembly for rotating the cloth roller to unwind or wind the cloth; the scissor assembly further includes a cloth support plate fixedly installed at the top of the second stroke slide rail, and the scissor support slides inside the cloth support plate.

[0007] Furthermore, the present application also proposes that the scissor assembly further includes a cloth pressing mechanism, which includes a pressing plate fixedly connected to the scissor support. A cutting groove is formed in the middle part of the pressing plate, and the blade is located in the cutting groove.

[0008] Furthermore, the present application also proposes that a number of presser wheel grooves are evenly distributed on both sides of the cutting groove, and a presser wheel mechanism is rotatably installed in the presser wheel grooves.

[0009] Furthermore, the present application also proposes that a tipping plate is provided at the front end of the pressing plate.

[0010] Furthermore, the present application also proposes that the presser wheel mechanism includes an inverted U-shaped fixed bracket. An inverted U-shaped movable bracket is movably installed in the fixed bracket. A presser wheel is rotatably installed on the inner side of the movable bracket. An adjusting spring is connected between the top end of the movable bracket and the top end of the inner side of the fixed bracket.

[0011] Furthermore, the present application also proposes a method for using the above-mentioned fabric discharging device for circular knitting machines, including the following steps: S1. When the transportation platform carries an empty bobbin core and a shearing device close to the circular knitting machine, the shearing assembly is in a contracted state and completely retracted into the transportation platform; S2. The transportation platform enters the machine through the narrow door of the circular knitting machine. At this time, the first stroke slide rail drives the second stroke slide rail to move to the outermost side, and the second stroke slide rail then drives the scissor assembly to move to the outermost side, so that the scissor assembly is located on the side of the fabric; S3. The robotic arm gripper assembly grabs the full cloth roll and places it on the buffer position behind the shearing assembly. During the movement, the cloth roll is driven to rotate by the rubbing wheel assembly to release the cloth, so that the fabric laid on the cloth supporting plate is in a relaxed state, preventing the fabric from rebounding after subsequent cutting and affecting the subsequent winding of the empty bobbin core; S4. When cutting starts, the first stroke slide rail and the second stroke slide rail act synchronously, so that the scissor assembly moves uniformly to the other side. The fabric smoothly enters under the pressing plate through the tipping plate at the front end of the pressing plate. The pressing plate and the presser wheel mechanism fix the fabric. The presser wheel maintains an appropriate pressure through the adjusting spring, and the blade rotates to complete the cutting of the fabric. S5. After cutting is completed, the robotic arm gripper assembly takes out the empty bobbin core from the placement groove, winds the cloth and installs it on the circular knitting machine. S6. The AMR transport vehicle carries the cut cloth roll away from the circular knitting machine to complete the entire automation process.

[0012] As can be seen from the above, a fabric discharging device for circular knitting machines and its using method provided by the present application integrate a robotic arm gripper, a shearing assembly and a buffer position through a transportation platform, and cooperate with an automated cutting process to realize automatic cutting, cloth roll replacement and transportation of the fabric, without manual intervention in opening the door, handling and loading the roll operation, having the advantages of high automation degree, improved efficiency and reduced manual labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the fabric discharging device for circular knitting machines provided in the specific embodiment of the present invention;

[0014] Figure 2 is a schematic diagram of the structure of a shearing assembly provided in a specific embodiment of the present invention;

[0015] Figure 3 is a schematic structural diagram of a scissors assembly provided in a specific embodiment of the present invention;

[0016] Figure 4 is a structural schematic diagram of a cloth pressing mechanism provided in a specific embodiment of the present invention;

[0017] In the figure:

[0018] 1. Transport platform; 2. Robotic arm gripper assembly; 3. Shearing assembly; 4. Placement slot; 5. Cache position; 6. Sinking U-shaped plate; 7. First stroke slide rail; 8. Second stroke slide rail; 9. Scissors assembly; 10. Scissors bracket; 11. Blade fixing plate; 12. Blade; 13. Cloth pressing mechanism; 14. Pressing plate; 15. Cutting groove; 16. Pressing wheel groove; 17. Pressing wheel mechanism; 18. Fixed bracket; 19. Movable bracket; 20. Pressing wheel; 21. Adjustment spring; 22. Rubbing wheel assembly; 23. Cloth supporting plate; 24. Seesaw. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the present application to clearly and completely describe the technical solutions in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The components of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed for protection, but only represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0020] In the prior art, when the cloth roller is full of cloth during the weaving process of the circular knitting machine, manual operations such as door opening, cutting, transportation and replacement of empty rollers are required. The traditional workflow has the disadvantages of cumbersome operation steps, frequent manual intervention, low efficiency and high labor intensity. In particular, when passing through the narrow door of the circular knitting machine, ordinary transportation equipment is difficult to enter due to volume limitations, making it difficult to implement automation transformation.

[0021] To solve the above problems, the inventors found that the bottleneck of manual operation lies in the contradiction between material flow and equipment compatibility. Through the actual measurement and analysis of the working space of the circular knitting machine, it is realized that the transportation device must have both a compact shape and the ability to integrate functions. By studying the cutting action trajectory of the cloth, it is found that the horizontal movement cutting method can avoid abnormal cloth surface tension. Combining the operating characteristics of automated equipment, it is determined that a mobile platform with a retractable cutting mechanism needs to be constructed, so that it can not only pass through narrow channels but also expand to perform precise cutting operations.

[0022] Therefore, the present application proposes a technical solution including a transportation platform 1, on which a robotic arm gripper assembly 2, a shearing assembly 3, and a placement groove 4 for placing empty bobbin cores are provided in front of the shearing assembly 3, and a buffer position 5 for placing finished cloth rolls is provided behind the shearing assembly 3. The shearing assembly 3 includes a sunken U-shaped plate 6, which is fixedly installed below the transportation platform 1. A first stroke slide rail 7 is fixedly arranged inside the sunken U-shaped plate 6, and a second stroke slide rail 8 is slidably installed on the first stroke slide rail 7, and a scissor assembly 9 is slidably installed on the second stroke slide rail 8.

[0023] Among them, the transportation platform 1 refers to a mobile base for carrying automated components, which can be specifically realized by an automatic guided vehicle equipped with drive wheels and a navigation system, and has the function of autonomous movement. The robotic arm gripper assembly 2 refers to a mechanical device for performing material grasping operations, which can be specifically realized by a multi-degree-of-freedom robotic arm cooperating with an adaptive fixture to complete the grasping and transfer of cloth rolls. The shearing assembly 3 refers to a functional module for performing cloth cutting, which can be specifically realized by a double-track sliding mechanism cooperating with a rotary cutter to realize the telescopic and moving functions of the shearing assembly 3. The sunken U-shaped plate 6 refers to a support structure installed at the lower part of the transportation platform 1, which can be specifically manufactured by a steel plate bending process to form a recessed space for accommodating the slide rail assembly. The first stroke slide rail 7 and the second stroke slide rail 8 refer to linear guide rails constituting a compound kinematic pair, which can be specifically realized by a linear guide rail cooperating with a servo motor drive to provide two-way movement degrees of freedom.

[0024] Specifically, when the transportation platform 1 approaches the circular knitting machine, the shearing assembly 3 is kept completely retracted inside the U-shaped plate. At this time, the overall external dimension adapts to the requirement of passing through the narrow door of the circular knitting machine. After entering the working area, the first stroke slide rail 7 drives the second stroke slide rail 8 to expand horizontally to the edge of the cloth. Subsequently, the scissor assembly 9 moves longitudinally along the second stroke slide rail 8 to the cutting starting position to avoid hindering the pulling out of the cloth roll. The robotic arm gripper assembly 2 synchronously grasps the full cloth roll and transfers it to the buffer position 5, and releases the cloth surface tension through the friction wheel assembly 22. During the shearing process, the double slide rails cooperate to control the tool to move along a predetermined trajectory. The whole process forms a continuous operation cycle of material picking and placing, cloth cutting, and empty roll replacement.

[0025] Compared with the prior art, traditional manual operation requires separately completing equipment entry and exit, cloth roller replacement, and cutting operations. However, in this solution, by integrating a retractable cutting mechanism with an automatic transportation platform 1, a single device can complete the entire process operation. Existing cutting devices are usually fixedly installed in the working area and cannot adapt to the space limitations of different models. The sunken slide rail mechanism in this solution not only ensures the mobility of the equipment but also provides a stable cutting operation plane.

[0026] Through the above technical solution, this application effectively solves the problems of low manual operation efficiency and high labor intensity. The transportation platform 1 automatically completes equipment entry and exit and material transportation. The robotic arm assembly replaces manual handling of heavy objects. The double-stroke slide rail design enables the cutting mechanism to adapt to narrow working spaces. The retractable feature of the shearing assembly 3 avoids structural interference during equipment movement. The layout of the buffer position 5 and the placement slot 4 forms a closed-loop material flow, reducing production downtime. The overall solution realizes the full-process automation of the under-cloth operation of the circular knitting machine, significantly improving production efficiency.

[0027] This application further proposes that the scissor assembly 9 includes a scissor support 10, the scissor support 10 is slidably installed on the second-stroke slide rail 8, and a blade 12 fixing plate 11 is fixedly installed on the scissor support 10, and a blade 12 is installed on the blade 12 fixing plate 11.

[0028] Among them, the scissor support 10 refers to a support structure for carrying the blade 12 fixing plate 11 and the blade 12. Specifically, it can be realized by welding aluminum alloy profiles or steel plates. Its sliding installation method realizes the linear guiding function through the cooperation of the slide rail and the slider. The blade 12 fixing plate 11 refers to a transition component for rigidly connecting the blade 12 and the scissor support 10. Specifically, it can be realized by fixing a carbon steel plate with a thickness of 5-8 mm by bolts to eliminate the assembly gap between the blade 12 and the support. The blade 12 refers to a sharp component for cutting cloth. Specifically, it can be made of high-speed steel or cemented carbide and is fixed in the preset installation hole position of the blade 12 fixing plate 11 by countersunk head screws.

[0029] Specifically, along the sliding trajectory of the scissor support 10 on the second-stroke slide rail 8, the straightness error of the slide rail is controlled within 0.05 mm / m. When the slide rail drive system is started, the blade 12 fixing plate 11 drives the blade 12 to perform a uniform linear motion along the moving direction of the slide rail. The rigid connection between the blade 12 fixing plate 11 and the scissor support 10 makes the blade 12 have no relative displacement during the movement process, and the cutting edge of the blade 12 is always perpendicular to the cloth surface. During the cutting process, the repeat positioning accuracy of the slide rail system reaches ±0.1 mm, ensuring the consistency of the cutting path of the blade 12 each time.

[0030] Through the above technical solutions, the present application solves the problem of uneven fabric cut edges caused by mechanical vibration and positioning deviation during the automated cutting process, and realizes the precise control of the movement trajectory of the blade 12 during continuous cutting operations. The combined structure of the slide rail and the fixed plate enables the cutting force to be evenly transmitted throughout the length of the blade 12, avoiding the deformation of the blade 12 caused by excessive local stress in traditional cutting machines. The multi-point locking design of the blade 12 fixed plate 11 effectively suppresses the resonance phenomenon caused by high-frequency shearing actions, ensuring the system stability under 60 cutting operations per minute.

[0031] The present application further proposes that the robotic arm jaw assembly 2 includes a rubbing wheel assembly 22, and the rubbing wheel assembly 22 is configured to drive the cloth roller to rotate to achieve the cloth feeding or winding operation; the scissor assembly 9 includes a cloth supporting plate 23, the cloth supporting plate 23 is fixed on the top of the second stroke slide rail 8, and the scissor bracket 10 is arranged to slide inside the cloth supporting plate 23.

[0032] Among them, the rubbing wheel assembly 22 refers to an actuator that generates rotational power through mechanical drive, and specifically can be implemented by means of a motor driving a friction wheel or a pulley. A rubber layer is provided on the surface of the friction wheel to increase the contact friction force with the cloth roller. The cloth supporting plate 23 refers to a plate structure with a planar supporting function, and specifically can be formed by processing a stainless steel plate to form a smooth supporting surface, and the surface is polished to reduce the sliding resistance of the fabric.

[0033] Specifically, when the robotic arm jaw assembly 2 grabs the fully loaded cloth roller and moves it towards the buffer position 5, the rubbing wheel assembly 22 actively drives the cloth roller to rotate to release the fabric. During the release process, by controlling the matching relationship between the rotational speed of the cloth roller and the moving speed of the robotic arm, the fabric between the cloth roller and the circular knitting machine is in a tension-free state. The released fabric is laid flat on the surface of the cloth supporting plate 23 to form a slack section. At this time, the scissor bracket 10 moves along the inner slide rail of the cloth supporting plate 23 to the edge of the fabric. When the cutting action is initiated, the pressing plate 14 and the cloth supporting plate 23 jointly clamp the slack fabric, and the blade 12 completes the cutting along the cutting groove 15. After cutting, the slack end of the fabric is still constrained on the surface of the cloth supporting plate 23, providing a positioning reference for the subsequent empty bobbin cloth winding.

[0034] Compared with the prior art, in traditional manual operations, the operator needs to manually rotate the cloth roller to adjust the fabric tension, resulting in problems such as low adjustment accuracy and inability to maintain the fabric in a slack state. Existing equipment lacks the interlocking control of the fabric release and cutting stations, and the cut end of the fabric is prone to misalignment due to tension retraction after cutting. This solution actively controls the fabric release amount during the transfer of the cloth roller through the coordinated actions of the robotic arm jaw and the cutting assembly 3, and cooperates with the planar supporting function of the cloth supporting plate 23 to keep the fabric at the cutting station in a tension-free state, eliminating the possibility of fabric rebound from the physical structure level.

[0035] Through the above technical solution, the present application effectively solves the problem of cutting edge deviation caused by uneven tension during the cloth cutting process. Through the cooperation of the automated cloth release and support structure, it ensures that the cut cloth head accurately stays at the predetermined work station, provides an accurate positioning reference for the subsequent cloth winding process, and simultaneously realizes the continuous automated operation of cloth roller transfer and cloth cutting.

[0036] The present application further proposes to set a cloth pressing mechanism 13 in the scissor assembly 9. The cloth pressing mechanism 13 includes a pressing plate 14 fixed to the scissor bracket 10. A cutting groove 15 is opened in the middle of the pressing plate 14, and the blade 12 is placed in the groove.

[0037] Among them, the cloth pressing mechanism 13 refers to a device that applies pressure to the cloth through a mechanical structure. Specifically, it can be realized by using a metal pressing plate 14 and a spring linkage mechanism, which is used to keep the cloth flat during the cutting process. The cutting groove 15 opened in the middle of the pressing plate 14 refers to a strip-shaped opening located in the middle of the pressing plate 14. Specifically, it can be formed into a groove structure by laser cutting, which is used to provide a movement space for the blade 12 while keeping the cloth on both sides under pressure.

[0038] Specifically, during the shearing process, the scissor bracket 10 drives the pressing plate 14 to move above the cloth, and the whole pressing plate 14 presses down to make the cloth closely adhere to the cloth supporting plate 23. The pressing plate 14 areas on both sides of the cutting groove 15 form a symmetrical pressure distribution on the cloth, eliminating the deformation of the cloth caused by its own elasticity. When the blade 12 moves along a predetermined trajectory in the cutting groove 15, the groove wall guides the blade 12 to avoid the deviation of the cutting direction. The width of the cutting groove 15 and the thickness of the blade 12 form a clearance fit, which not only allows the blade 12 to move freely but also limits its lateral swing amplitude. After the blade 12 completes the cutting action, the pressing plate 14 withdraws synchronously with the scissor bracket 10, releasing the pressure on the cloth.

[0039] Compared with the prior art, traditional manual cutting requires operators to manually press the cloth, resulting in the problem of uneven force application and cloth wrinkles. Most existing automated equipment uses independent pressure roller devices, which require additional drive mechanisms, resulting in complex equipment structures. This solution integrates the cloth pressing function into the scissor assembly 9, and through the synchronous movement of the pressing plate 14 and the blade 12, it simplifies the mechanical structure while realizing the timing coordination of cloth fixing and cutting actions.

[0040] Through the above technical solution, the present application realizes the dynamic stability control during the cloth cutting process, effectively prevents the phenomenon of cutting edge skew caused by cloth displacement, and ensures the straightness accuracy of the cutting trajectory. The combined design of the pressing plate 14 and the cutting groove 15 synchronously completes the cloth fixing and cutting operations in a single stroke, avoiding the error accumulation of cloth secondary positioning in traditional step-by-step operations and improving the reliability of automated shearing operations.

[0041] The present application further proposes to provide a rotatable press wheel 20 mechanism 17 in the press wheel 20 grooves 16 evenly distributed on both sides of the cutting groove 15.

[0042] Among them, the press wheel 20 groove 16 refers to a rectangular groove structure distributed on both sides of the cutting groove 15, which can be specifically implemented by a U-shaped groove body structure arranged at equal intervals, and is used to define the position and movement trajectory of the press wheel 20 mechanism 17. The press wheel 20 mechanism 17 refers to a rotating assembly composed of a bracket and a roller, which can be specifically implemented by a structure in which a rotating shaft and a bearing are installed in an inverted U-shaped bracket, and the pressure is adjusted by a spring, so that the roller produces an elastic downward pressure when contacting the fabric.

[0043] Specifically, the press wheel 20 grooves 16 are arranged at equal intervals along the length direction of the cutting groove 15 to form symmetrically distributed linear pressure application points. When the fabric enters below the pressing plate 14, the press wheel 20 mechanism 17 applies a vertical pressure to the fabric surface through its own gravity and spring elasticity. During the cutting process of the blade 12, the press wheel 20 rotates with the movement of the fabric, allowing the fabric to produce a small amount of displacement within a fixed area, eliminating the local tensile deformation caused by the stress in the cutting direction. At the same time, the segmented pressure distribution formed by multiple press wheel 20 mechanisms 17 avoids the stress concentration phenomenon in the edge area caused by the traditional integral pressing plate 14.

[0044] Compared with the prior art, the traditional fabric fixing device uses a whole pressing plate 14 to directly cover the cutting area, resulting in incision deformation due to the elastic contraction of the fabric at the moment of cutting. This solution constructs a flexible contact surface through the independent press wheel 20 mechanism 17, allowing the fabric to naturally release internal stress while maintaining the straightness of the cutting line. The segmented pressure application method not only avoids fabric damage caused by local overextrusion, but also ensures that the fabric is always in a flat state during the cutting process.

[0045] Through the above technical solution, the fabric is flexibly fixed by the evenly distributed press wheel 20 mechanisms 17 during the cutting process, effectively preventing displacement and wrinkles caused by sudden changes in tension. The self-rotation characteristic of the press wheel 20 enables the fabric to perform a small amount of displacement compensation in the cutting direction, eliminating the pulling deformation caused by rigid fixing. The segmented pressure application mechanism avoids the indentation damage to the fabric surface caused by the traditional integral pressing plate 14, ensuring that the edge of the cut fabric roll is neat.

[0046] The present application further proposes that a tipping plate 24 is provided at the front end of the pressing plate 14.

[0047] Among them, the tipping plate 24 refers to the guiding structure arranged at the front end of the pressing plate 14, which can be specifically realized by an upwardly inclined arc-shaped metal plate, and its end has a smoothly transitioning curved edge. This structure enables the fabric to naturally slide into the working area below the pressing plate 14 through physical guiding. Among them, the inclination angle range of the tipping plate 24 can be set to 15° - 45°, and a fixed angle design of 30° can be specifically adopted. This angle range can effectively avoid the hard collision between the front end of the fabric and the edge of the pressing plate 14 through experimental verification.

[0048] Specifically, when the fabric is conveyed to the shearing area, the tipping plate 24 comes into contact with the fabric through the geometric shape of its front end curving upwards. During the movement of the fabric, the front end first contacts the inclined surface of the tipping plate 24. Under the dual action of gravity and the movement direction, the fabric naturally moves down along the arc surface of the tipping plate 24 and enters the gap between the pressing plate 14 and the fabric supporting plate 23. During this process, the tipping plate 24 eliminates the right-angle contact between the fabric and the pressing plate 14, avoiding local accumulation of the fabric due to edge jamming, thereby ensuring that the fabric enters the shearing area smoothly.

[0049] Compared with the prior art, the front end of the pressing plate 14 in the traditional shearing device is a right-angle structure, and the front end of the fabric is prone to curling or offset due to frictional resistance when entering. However, in this solution, by adding the tipping plate 24 structure, without adding a driving device, the self-centering function of the fabric is realized using the mechanical guiding principle, solving the problem of efficiency loss caused by manual adjustment or a complex guide roller system.

[0050] Through the above technical solution, this application can effectively eliminate the risk of position offset when the fabric enters the shearing area, avoid the phenomenon of skewed cutting lines caused by fabric wrinkles, and at the same time reduce the manual fabric sorting process before shearing, ensuring the continuity of the automated shearing process.

[0051] This application further proposes that the pressing wheel 20 mechanism 17 includes an inverted U-shaped fixed bracket 18. An inverted U-shaped movable bracket 19 is movably installed inside the fixed bracket 18. A pressing wheel 20 is rotatably installed inside the movable bracket 19. An adjusting spring 21 is connected between the top end of the movable bracket 19 and the inner top end of the fixed bracket 18.

[0052] Among them, the inverted U-shaped fixed bracket 18 refers to a U-shaped cross-section support member with a downward opening, which can be specifically formed by bending a steel plate and is used to provide a vertical sliding space for the movable bracket 19. Among them, the inverted U-shaped movable bracket 19 refers to a movable U-shaped member nested inside the fixed bracket 18, which can be specifically made of an aluminum alloy profile with a slide rail and is used to carry the pressing wheel 20 and achieve vertical displacement. Among them, the adjusting spring 21 refers to an elastic element with axial telescopic function, which can be specifically a helical compression spring and is used to generate an adjustable contact pressure between the movable bracket 19 and the fixed bracket 18.

[0053] Specifically, when the fabric enters the area of the pressing plate 14, the movable support 19 generates a downward force through the adjusting spring 21, driving the pressing wheel 20 to contact the fabric surface. When the fabric thickness changes, the movable support 19 generates a vertical displacement along the inner wall of the fixed support 18, and automatically adjusts the pressing force through the compression deformation of the spring. While maintaining the contact pressure on the fabric, the pressing wheel 20 can rotate as the fabric moves, reducing the frictional resistance. Thus, a pressing device with an adaptive adjustment function is formed, which not only prevents the displacement of the fabric due to insufficient pressure during cutting, but also avoids the deformation of the fabric caused by excessive pressure.

[0054] Compared with the prior art, traditional fabric pressing devices mostly use fixed pressing plates 14 or rigid pressing wheels 20 with manually adjusted bolts, which cannot meet the pressing requirements for fabrics of different thicknesses. Through the cooperation of the spring and the movable support 19, this solution realizes the dynamic balance of the fabric pressing force and solves the problems of low manual adjustment efficiency and poor pressure consistency.

[0055] Through the above technical solution, this application automatically maintains a stable contact pressure during the fabric cutting process, prevents the fabric from sliding or rebounding, ensures that the flatness of the cut edge meets the requirements of the subsequent automatic fabric winding process, and at the same time adapts to the thickness changes of fabrics in different batches, improving production continuity and quality stability.

[0056] This application further proposes the following steps: When the transportation platform 1 approaches the circular knitting machine with an empty bobbin core and a shearing device, the shearing assembly 3 is in a contracted state and is completely retracted into the transportation platform 1; the transportation platform 1 enters the machine interior through the narrow door of the circular knitting machine, the first stroke slide rail 7 drives the second stroke slide rail 8 to move to the outermost side, and the second stroke slide rail 8 then drives the scissor assembly 9 to move to the outermost side, so that the scissor assembly 9 is located on the side of the fabric; the robotic arm gripper assembly 2 grabs the full fabric roll and places it on the buffer position 5 behind the shearing assembly 3. During the movement, the fabric roll is driven to rotate through the rubbing wheel assembly 22 for fabric release, so that the fabric laid on the cloth support plate 23 is in a relaxed state; the first stroke slide rail 7 and the second stroke slide rail 8 act synchronously, so that the scissor assembly 9 moves uniformly to the other side, and the fabric enters under the pressing plate 14 through the tipping plate 24 at the front end of the pressing plate 14. The pressing plate 14 and the pressing wheel 20 mechanism 17 fix the fabric, and the blade 12 rotates to complete the cutting; the robotic arm gripper assembly 2 takes out the empty bobbin core from the placement groove 4 for fabric winding and then installs it on the circular knitting machine; the AMR transport vehicle carries the cut fabric roll away from the circular knitting machine.

[0057] Among them, the transportation platform 1 refers to a mobile base for carrying the empty bobbin core and the shearing device, which can be specifically implemented by an automated vehicle with a traveling mechanism. The shearing assembly 3 in its retracted state can avoid interference with the narrow door of the circular knitting machine. The first stroke slide rail 7 refers to a linear guide rail extending longitudinally along the transportation platform 1, which can be specifically implemented by a ball screw drive structure, and is used to drive the second stroke slide rail 8 to move horizontally to adjust the working range of the scissors assembly 9. The second stroke slide rail 8 refers to a guide rail arranged perpendicular to the first stroke slide rail 7, which can be specifically implemented by an electric slide table structure, and is used to drive the scissors assembly 9 to accurately position along the side of the fabric. The rubbing wheel assembly 22 refers to a clamping mechanism with a rotational drive function, which can be specifically implemented by a servo motor combined with a rubber friction wheel structure, and releases the fabric tension by actively rotating the fabric roller. The pressing wheel 20 mechanism 17 refers to a rolling pressing device with an elastic adjustment function, which can be specifically implemented by an inverted U-shaped bracket combined with a spring adjustment structure, and keeps the fabric flat and non-offset during the cutting process. The AMR transport vehicle refers to an autonomous mobile robot, which can be specifically implemented by a combination of a laser navigation and obstacle avoidance system and an AGV chassis structure, and is used for automatically transporting the finished fabric roll.

[0058] Specifically, when the transportation platform 1 carries the empty bobbin core and the retracted shearing assembly 3 close to the circular knitting machine, its overall height is compressed to pass through the narrow door of the machine. After entering the interior of the circular knitting machine, the first stroke slide rail 7 drives the second stroke slide rail 8 to expand horizontally, so that the scissors assembly 9 reaches the starting position at the edge of the fabric. During the process of the robotic arm gripper assembly 2 grasping the full fabric roller, the rubbing wheel assembly 22 actively releases the fabric by rotating in the reverse direction, so that the fabric piled up on the fabric support plate 23 forms a slack state, eliminating the risk of elastic retraction after cutting. During cutting, the double slide rails synchronously drive the scissors assembly 9 to move at a constant speed. The tipping plate 24 at the front end of the pressing plate 14 guides the fabric under the pressing wheel 20 mechanism 17, and the spring-adjusted pressing wheel 20 allows the fabric to pass smoothly while maintaining an appropriate pressure. After cutting, the robotic arm gripper assembly 2 directly picks up the pre-set empty bobbin core for fabric winding operation, avoiding manual handling of heavy objects. The AMR transport vehicle automatically transports the finished fabric roll to the designated area according to the preset path, completing the full-process material transfer.

[0059] Compared with the prior art, the traditional method relies on manual labor to complete operations such as opening the door, cutting, handling, and changing the roller, and requires multiple entries into the interior of the machine to adjust the equipment. In this solution, by integrating the transportation platform 1 with automated components, the shearing device autonomously unfolds and positions inside the machine, the robotic arm synchronously completes fabric roll replacement and fabric tension control, and the AMR transport vehicle realizes unmanned material transportation, integrating the originally separate manual operation steps into a continuous automated process.

[0060] Through the above technical solution, the present application can avoid manual operation inside the machine frequently, eliminate the physical labor of handling cloth rollers, ensure the flatness of the cut cloth through automatic cloth feeding control, and at the same time use the coordinated movement of the double slide rails to achieve a stable cutting path, and finally achieve a full-automatic closed-loop operation of the cloth discharging, cutting and roll changing processes of the circular knitting machine.

[0061] The above are only the embodiments of the present application and are not used to limit the protection scope of the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cloth laying device for a circular knitting machine, characterized in that: The invention comprises a transport platform (1), on which a mechanical arm clamping assembly (2), a shearing assembly (3), and a placement slot (4) arranged on the front side of the shearing assembly (3) for placing an empty rod core; and a cache position (5) for placing a finished cloth roll is arranged on the rear side of the shearing assembly (3); The shearing assembly (3) comprises a sinking U-shaped plate (6), the sinking U-shaped plate (6) is fixedly installed below the transport platform (1), a first travel slide rail (7) is fixedly arranged inside the sinking U-shaped plate (6), a second travel slide rail (8) is slidably installed on the first travel slide rail (7), and a scissors assembly (9) is slidably installed on the second travel slide rail (8).

2. The cloth laying device for a circular knitting machine according to claim 1, characterized in that: The scissors assembly (9) comprises a scissors bracket (10), wherein the scissors bracket (10) is slidably mounted on the second travel slide rail (8), a blade (12) fixing plate (11) is fixedly mounted on the scissors bracket (10), and a blade (12) is mounted on the blade (12) fixing plate (11).

3. The cloth laying device for a circular knitting machine according to claim 2, characterized in that: The mechanical arm clamp assembly (2) comprises a rubbing wheel assembly (22), and the rubbing wheel assembly (22) is used to rotate the cloth roller to release or roll the cloth; The scissors assembly (9) also includes a cloth supporting plate (23), wherein the cloth supporting plate (23) is fixedly mounted on the top end of the second stroke slide rail (8), and the scissors bracket (10) slides inside the cloth supporting plate (23).

4. The cloth laying device for a circular knitting machine according to claim 3, characterized in that: The scissors assembly (9) further comprises a cloth pressing mechanism (13), wherein the cloth pressing mechanism (13) comprises a pressing plate (14), wherein the pressing plate (14) is fixedly connected to the scissors bracket (10), wherein a cutting groove (15) is provided in the middle portion of the pressing plate (14), and the blade (12) is located in the cutting groove (15).

5. The cloth laying device for a circular knitting machine according to claim 4, characterized in that: A plurality of pressing wheel (20) grooves (16) are evenly distributed on both sides of the cutting groove (15), and a pressing wheel (20) mechanism (17) is rotatably installed in the pressing wheel (20) groove (16).

6. The cloth laying device for a circular knitting machine according to claim 5, characterized in that: A seesaw plate (24) is provided at the front end of the pressing plate (14).

7. The cloth laying device for a circular knitting machine according to claim 6, characterized in that: The pressure wheel (20) mechanism (17) comprises an inverted U-shaped fixed bracket (18), an inverted U-shaped movable bracket (19) is movably installed inside the fixed bracket (18), a pressure wheel (20) is rotatably installed inside the movable bracket (19), and an adjustment spring (21) is connected between the top end of the movable bracket (19) and the top end inside the fixed bracket (18).

8. A method for using the cloth laying device for a circular knitting machine according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. When the transport platform (1) carries the empty rod core and the shearing device and approaches the circular knitting machine, the shearing assembly (3) is in a retracted state and is completely retracted into the transport platform (1); S2, the transport platform (1) enters the interior of the circular knitting machine through the narrow door, at which time the first stroke slide rail (7) drives the second stroke slide rail (8) to move to the most side, and the second stroke slide rail (8) then drives the scissor assembly (9) to move to the most outer side, so that the scissor assembly (9) is located at the side of the cloth; S3, the robot arm gripper assembly (2) grabs the full cloth roller and places it on the buffer position (5) behind the shearing assembly (3). During the movement, the cloth roller is driven to rotate by the rubbing wheel assembly (22) to release the cloth, so that the cloth laid on the cloth supporting plate (23) is in a relaxed state, so as to prevent the cloth from rebounding after subsequent cutting and affecting the subsequent empty rod core cloth winding; S4, when shearing starts, the first stroke slide rail (7) and the second stroke slide rail (8) move synchronously, so that the scissor assembly (9) moves to the other side at a uniform speed, and the cloth smoothly enters under the pressing plate (14) through the seesaw (24) at the front end of the pressing plate (14), and the pressing plate (14) and the pressing wheel (20) mechanism (17) fix the cloth, and the pressing wheel (20) maintains appropriate pressure by adjusting the spring (21), and the blade (12) rotates to complete the cutting of the cloth; S5. After the cutting is completed, the robot arm gripper assembly (2) takes out the empty rod core from the placement slot (4), rolls the cloth, and then installs it on the circular knitting machine; S6. The transport platform (1) carries the cut cloth roll away from the circular knitting machine, completing the entire automation process.

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