A fabric circular knitting machine

Abstract

The application discloses a fabric circular knitting machine and relates to the technical field of knitting equipment, which comprises a rack and a pulling and winding mechanism; the pulling and winding mechanism comprises a winding device; the winding device comprises a winding shaft and a first driving element, and the first driving element is used for driving the winding shaft to rotate; the pulling and winding mechanism further comprises an up-down feeding device; the up-down feeding device comprises a first rotating frame, a second rotating frame and a plurality of second driving elements; when the second driving elements drive the second rotating frame to move to a limit position in a direction away from the rack, the second rotating frame is close to the opening, and the first rotating frame and the second rotating frame jointly form a structure that is inclined downward in a direction close to the opening. The application can facilitate workers to complete the replacement of the winding shaft and the operation of fabric unloading, reduce the labor intensity of the workers, and effectively improve the production efficiency of the fabric.

Description

Technical Field

[0001] This application relates to the technical field of knitting equipment, and in particular to a circular knitting machine for fabrics. Background Technology

[0002] The circular knitting machine (also known as the circular weft knitting machine) has a large number of loop-forming systems (industry-specific terms for yarn feed paths or loop-forming paths, or simply paths). It features high speed, high output, fast pattern changes, good fabric quality, fewer processes, and strong product adaptability. As a result, it has developed rapidly in the knitting industry and is one of the most commonly used knitting equipment.

[0003] Existing circular knitting machines consist of a frame, yarn feeding mechanism, transmission mechanism, lubrication and dust removal mechanism, electrical control mechanism, traction and take-up mechanism, and other auxiliary devices. The traction and take-up mechanism's function is to pull the knitted fabric from the knitting area and wind (or fold) it into a specific roll shape, which is then unloaded by the operator.

[0004] However, since the fabric cutting and winding shaft assembly / disassembly operations are all performed at the bottom of the machine frame, and the space at the bottom of the machine frame is limited, it is inconvenient for the staff to operate, which greatly affects the operating speed and accuracy. In addition, the winding shaft with the fabric has a certain mass, so the above operations will also increase the labor intensity of the staff, making the fabric unloading process time-consuming and laborious and affecting the production efficiency of the fabric. Summary of the Invention

[0005] This application provides a circular knitting machine for fabric production, which allows workers to easily change the winding shaft and unload the fabric, reducing the labor intensity of workers and effectively improving the production efficiency of fabric.

[0006] This application provides a circular knitting machine for fabric production, which adopts the following technical solution: A circular knitting machine for fabrics includes a frame and a pull-and-wind mechanism. The pull-and-wind mechanism is disposed at the bottom of the frame, and the bottom of the frame has an inner cavity for mounting the pull-and-wind mechanism. A material inlet is formed on one side of the inner cavity at the bottom of the frame. A enclosure structure for protecting the pull-and-wind mechanism is disposed on the outside of the frame. The enclosure structure has a cavity inside, and the inner cavity communicates with the cavity through the material inlet. An opening is formed on one side of the cavity at the enclosure structure, and the enclosure structure is provided with a protective door for controlling the opening and closing of the opening. The pulling and winding mechanism includes a winding device for winding fabric; the winding device includes a winding shaft and a first driving member, the winding shaft is detachable and horizontally arranged in the inner cavity, and the first driving member is used to drive the winding shaft to rotate. The pulling and winding mechanism also includes a loading and unloading device for assisting the loading and unloading of the winding shaft; the loading and unloading device is located at the bottom of the frame near the material inlet, and includes a first rotating frame, a second rotating frame and several second driving components; One end of the first rotating frame is rotatably connected to the frame and is located near the installation position of the winding shaft, and its rotation axis is parallel to the axis of rotation of the winding shaft driven by the first driving member; one end of the second rotating frame is rotatably connected to the other end of the first rotating frame, and its rotation axis is parallel to the rotation axis of the first rotating frame; the second driving member is disposed at the end of the second rotating frame away from the first rotating frame, and is used to drive the end of the second rotating frame away from the first rotating frame to move on the ground; When the second driving member drives the second rotating frame to move to its limit position in a direction away from the frame, the second rotating frame approaches the opening, and the first rotating frame and the second rotating frame together form a structure that tilts downward in a direction close to the opening.

[0007] By adopting the above technical solution, the loading and unloading device can facilitate the operation of loading and unloading the winding shaft, thereby making it easier for workers to change the winding shaft and unload the fabric, reducing the labor intensity of workers, and effectively improving the production efficiency of the fabric.

[0008] Optionally, the traction winding mechanism further includes a drive device for the first drive member to drive the winding shaft to rotate, a mounting device for the winding shaft to be detachably installed, and a cutting device for cutting the fabric. The driving device includes a plurality of driving wheels; both ends of the winding shaft are provided with driven wheels. After the winding shaft is installed, one of the driven wheels contacts the driving wheel. The first driving member drives the driving wheel to rotate, which in turn drives the winding shaft to rotate. The installation device includes a mounting frame, a movable frame, and a third driving component; the mounting frame is disposed at the bottom of the frame, the movable frame is movably disposed on the mounting frame, and the movable frame is provided with a plurality of connecting structures for detachably rotating the winding shaft; the direction of movement of the movable frame is perpendicular to the rotation axis of the installed winding shaft, and the third driving component is disposed on the mounting frame and is used to control the movement of the movable frame; The cutting device is located at the bottom of the frame and in the inner cavity, and it cuts the fabric above the winding shaft after the fabric has been wound.

[0009] By adopting the above technical solution, the disassembly and assembly of the winding shaft can be simplified while ensuring the stability of the rotation control of the first driving component. At the same time, it is convenient for workers to complete the installation and positioning of the winding shaft by controlling the installation device, and further facilitates the workers to complete the replacement of the winding shaft and the fabric unloading operation, thereby further improving the production efficiency of the fabric.

[0010] Optionally, the mounting device further includes a fourth driving element; The mounting frame is rotatably connected to the frame, and its rotation axis is parallel to the rotation axis of the installed winding shaft. The fourth driving member is used to drive the mounting frame to rotate. The connecting structure is provided at both ends of the movable frame along its direction of movement. After the fourth driving component drives the mounting frame to rotate, the two connecting structures are located above and below the driving wheel, respectively. The connecting structure located above is used to install the winding shaft for the fabric to be wound, and the connecting structure located below is used to install the winding shaft for loading and unloading materials.

[0011] By adopting the above technical solution, the staff can quickly replace the old and new winding shafts by controlling the rotation of the mounting frame and the movement of the movable frame. This can effectively shorten the downtime required for the large circular kiln during the winding shaft replacement process, thereby further improving the production efficiency of the fabric.

[0012] Optionally, after the fourth driving member drives the mounting frame to rotate, the mounting frame tilts downward toward the material inlet; at this time, when the movable frame moves to its limit position toward the material inlet, the winding shaft mounted on the upper connecting structure is driven to rotate by the driving device, and the winding shaft mounted on the lower connecting structure moves closer to the first rotating frame.

[0013] By adopting the above technical solution, it is possible to further facilitate the loading and unloading of the winding shaft by the loading and unloading device, while preventing the loading and unloading operation of one winding shaft from affecting the winding of the fabric on the other winding shaft. It also allows the operator to perform the loading and unloading operation of the other winding shaft from a position far away from the winding shaft in the winding process, effectively improving the operator's safety.

[0014] Optionally, the surface of the winding shaft is provided with a plurality of connecting pieces for bonding the fabric; during the rotation of the mounting frame, the winding shaft contacts the tensioned fabric and then rotates to bond the connecting pieces to the fabric.

[0015] By adopting the above technical solution, it is possible to easily wind the fabric onto the new winding shaft. At the same time, during the rotation of the mounting frame, the new winding shaft rotates relative to the fabric, thereby improving the reliability and stability of the new winding shaft forming an adhesive bond with the fabric through the connecting piece, which facilitates subsequent winding.

[0016] Optionally, during the process of winding the fabric with the winding shaft, the fabric to be wound is located above the winding shaft.

[0017] By adopting the above technical solution, the cutting device can easily cut the fabric above the winding shaft after the fabric is wound, which makes it convenient for the ends of the cut fabric to continue to be wound on the winding shaft, reducing the probability of the fabric spreading out in the opposite direction to the winding direction, so as to ensure the quality of the rolled fabric during the unloading process.

[0018] Optionally, the cutting device includes a cutting blade and a fifth driving component; The cutting tool is movably mounted on the frame, and its direction of movement is parallel to the rotation axis of the installed winding shaft. The fifth driving member is used to drive the cutting tool to move. After the fourth driving member drives the mounting frame to rotate, the cutting tool is located on the side of the mounting frame near the feed opening and between the two connecting structures, and it is used to cut the fabric on the side of the fabric near the feed opening.

[0019] By adopting the above technical solution, the ends of the cut fabric can be easily wound onto the winding shaft under their own gravity, thereby further reducing the probability that the ends of the fabric will spread out in the opposite direction to the winding direction during the cutting process.

[0020] Optionally, the cutting device may further include a plurality of air blowers; The air blower is mounted on the frame, and several air blowers are spaced apart along the direction of movement of the cutting tool. The air blower is used to blow air toward the cutting position on the fabric.

[0021] By adopting the above technical solution, the air blower keeps blowing air onto the fabric during the cutting process, keeping the fabric in a taut state, thereby improving the cutting effect of the cutting device on the fabric. Furthermore, the wind power can be used to drive the ends of the cut fabric to continue to be wound on the winding shaft, thereby further ensuring the quality of the rolled fabric during the unloading process.

[0022] Optionally, the driving device includes two driving wheels, which rotate synchronously and in the same direction via a timing belt, and one of the driven wheels of the installed winding shaft simultaneously contacts both driving wheels.

[0023] By adopting the above technical solution, the support received by the winding shaft during the winding process can be improved, thereby improving the positional stability of the winding shaft during the winding process. At the same time, it can further improve the reliability and stability of the first driving component in controlling the rotation of the winding shaft.

[0024] Optionally, both the first rotating frame and the second rotating frame are provided with guide grooves adapted to the driven wheel. When the second rotating frame moves to its limit position in a direction away from the frame, the guide groove on the first rotating frame is aligned and communicates with the guide groove on the second rotating frame.

[0025] By adopting the above technical solution, it is possible to further facilitate the loading and unloading of the winding shaft by the workers using the inclined structure formed by the first rotating frame and the second rotating frame, thereby reducing the probability of the winding shaft slipping off the inclined structure.

[0026] In summary, this application includes at least one of the following beneficial effects: 1. It enables workers to easily change the winding shaft and unload the fabric, reducing the labor intensity of workers and effectively improving the production efficiency of the fabric; 2. It can shorten the downtime required for the circular knitting machine during the process of changing the winding shaft and unloading the fabric, thereby further improving the production efficiency of the fabric. 3. It can improve the structural stability of rolled fabrics during the unloading process and reduce the probability of the fabric ends unraveling due to the rolling of the winding shaft during unloading. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a circular knitting machine according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a circular knitting fabric machine during loading and unloading according to an embodiment of this application; Figure 3 This is a schematic diagram of the internal structure of a circular knitting machine according to an embodiment of this application; Figure 4 This is a partial structural schematic diagram of a circular knitting machine according to an embodiment of this application; Figure 5 This is a partial cross-sectional view of a circular knitting machine according to an embodiment of this application. Figure 1 ; Figure 6 This is a partial cross-sectional view of a circular knitting machine according to an embodiment of this application. Figure 2 ; Figure 7 This is a partial cross-sectional view of a circular knitting machine for fabrics in an embodiment of this application, when the positions of the winding shafts are changed.

[0028] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Inner cavity; 12. Material inlet; 13. Enclosure structure; 131. Cavity; 132. Opening; 133. Enclosure door; 14. Crossbar; 2. Pulling and winding mechanism; 3. Winding device; 31. Winding shaft; 311. Driven wheel; 312. Connecting piece; 313. Groove; 32. First driving component; 4. Loading and unloading device; 41. First rotating frame; 42. Second rotating frame; 43. Second driving component; 44. Guide groove; 5. Driving device; 51. Driving wheel; 52. Synchronous belt; 6. Mounting device; 61. Mounting frame; 62. Movable frame; 63. Third driving component; 64. Fourth driving component; 65. Connecting structure; 7. Cutting device; 71. Cutting blade; 72. Fifth driving component; 73. Air blower. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0030] Reference Figure 1 and Figure 2 This application discloses a circular knitting machine for fabrics, including a frame 1 and a pulling and winding mechanism 2 for winding fabric into a roll, wherein the pulling and winding mechanism 2 is installed at the bottom of the frame 1. In this embodiment, since the circular knitting machine is prior art in the art, its other structures will not be described in detail here, and its other structures in the accompanying drawings are only briefly shown.

[0031] The bottom of the frame 1 has an inner cavity 11 for the installation of the traction winding mechanism 2, and a material inlet 12 is formed on one side of the bottom of the frame 1 for the winding shaft 31 to enter and exit the inner cavity 11 to complete the loading and unloading. The outer side of the bottom of the frame 1 also has a enclosure structure 13 for protecting the internal structure such as the traction winding mechanism 2. The enclosure structure 13 encloses the outer side of the bottom of the frame 1 to form a cavity 131, and the inner cavity 11 communicates with the cavity 131 through the material inlet 12. An opening 132 is formed on one side of the cavity 131 to facilitate the entry and exit of the cavity 131 by the staff, and a number of protective doors 133 for controlling the opening and closing of the opening 132 are movably installed on the enclosure structure 13 at the opening 132. In this embodiment, the enclosure structure 13 is preferably cylindrical in shape, and has two enclosure doors 133, which are rotatably connected to the enclosure structure 13; and preferably the material inlet 12 and the opening 132 have the same orientation.

[0032] The pulling and winding mechanism 2 includes a winding device 3 for winding the fabric, a loading and unloading device 4 for assisting the winding shaft 31 in loading and unloading, a driving device 5 for driving the winding shaft 31 to rotate and winding the fabric, a mounting device 6 for mounting the winding shaft 31 and adjusting its position, and a cutting device 7 for cutting the fabric.

[0033] Reference Figure 3and Figure 4 The mounting device 6 is installed in the inner cavity 11 and includes a mounting bracket 61, a movable bracket 62, a third driving member 63, a fourth driving member 64, and two connecting structures 65.

[0034] Mounting bracket 61 is rotatably mounted on the bottom of frame 1 near the width of the feed inlet 12, with its rotation axis perpendicular to the orientation of the feed inlet 12 and centered along its length. The fourth driving member 64 is fixedly mounted on the outer side of the bottom of frame 1, located in cavity 131, and is used to drive mounting bracket 61 to rotate relative to frame 1. In this embodiment, the fourth driving member 64 is preferably a servo motor; since servo motors are common existing technology, they will not be described in detail here, and are only briefly shown in the accompanying drawings.

[0035] The movable frame 62 is movably mounted on the mounting frame 61, with its length direction parallel to the length direction of the mounting frame 61, and its direction of movement parallel to its own length direction. The third driving member 63 is fixedly mounted on the mounting frame 61 and is used to drive the movable frame 62 to move relative to the mounting frame 61. In this embodiment, the third driving member 63 is preferably a combination of a servo motor and a lead screw drive structure; and preferably, the length dimension of the movable frame 62 is greater than the length dimension of the mounting frame 61, and during the movement of the movable frame 62 relative to the mounting frame 61, both ends of its length direction remain located on both sides of the length direction of the mounting frame 61; since the lead screw drive structure is a common prior art, it will not be described in detail here, and it is only briefly shown in the accompanying drawings.

[0036] The connecting structure 65 is installed on the side of the movable frame 62 away from the mounting frame 61, and the two connecting structures 65 are respectively close to the two ends of the movable frame 62 in the length direction.

[0037] The winding device 3 includes a winding shaft 31 for winding the fabric and a first drive member 32 for providing power for the winding shaft 31 to rotate and wind the fabric; the drive device 5 plays the role of transmitting power between the first drive member 32 and the winding shaft 31, it is installed in the inner cavity 11 and located on the side of the inner cavity 11 away from the mounting device 6, and it includes two drive wheels 51 for driving the winding shaft 31 to rotate.

[0038] The winding shaft 31 has a cylindrical structure, with driven wheels 311 at both ends of its axis for contacting the drive wheel 51. The radial dimension of the driven wheel 311 is larger than the radial dimension of the shaft body of the winding shaft 31 for winding the fabric. The drive wheel 51 is rotatably mounted on the bottom of the frame 1 and located in the inner cavity 11. Its rotation axis is perpendicular to the orientation of the feed inlet 12. The two drive wheels 51 rotate in the same direction and synchronously through the synchronous belt 52. The first drive member 32 is fixedly mounted on the outer side of the bottom of the frame 1. It is located on the side of the bottom of the frame 1 away from the fourth drive member 64 and is used to directly drive one drive wheel 51 to rotate. In this embodiment, the first driving component 32 is preferably a servo motor; and preferably, the outer surface of the driving wheel 51 and the outer surface of the driven wheel 311 have mutually compatible textures to increase the friction between them, so that the two driving wheels 51 can drive the winding shaft 31 to rotate through the driven wheel 311 during synchronous and co-rotation. Since the synchronous belt 52 with the above functions and the textures with the above functions on the driving wheel 51 and the driven wheel 311 are common prior art, they will not be described in detail here. The synchronous belt 52 is only briefly shown in the figure and the texture is omitted.

[0039] A plurality of connecting pieces 312 for bonding with fabric are fixedly mounted on the surface of the winding shaft 31. The connecting pieces 312 are elongated strips that extend along the axial direction of the winding shaft 31, and the plurality of connecting pieces 312 are arranged in a circumferential array on the winding shaft 31 with the axial direction of the winding shaft 31 as the axis. In this embodiment, the connecting pieces 312 are preferably nylon adhesives, which can stably form an adhesive relationship with the fabric after contacting it. Since nylon adhesives are common prior art, they will not be described in detail here, and are only briefly shown in the accompanying drawings.

[0040] Both ends of the winding shaft 31 along its axial direction have grooves 313 for the connecting structure 65 to form a connection with it. After the connecting structure 65 is inserted into the groove 313 at one end of the winding shaft 31, the winding shaft 31 can be installed on the movable frame 62, and at this time the winding shaft 31 can rotate relative to the movable frame 62 about its own axis. In this embodiment, since the connecting structure 65 with the above-mentioned function is common prior art, it will not be described in detail here, and it is only briefly shown in the accompanying drawings.

[0041] Reference Figure 1 and Figure 2 The loading and unloading device 4 is installed on the outside of the bottom of the frame 1 and near the material inlet 12. It includes a first rotating frame 41, a second rotating frame 42 and several second driving components 43.

[0042] One end of the first rotating frame 41 along its length is rotatably connected to the bottom of the frame 1, and its rotation axis is parallel to the rotation axis of the mounting frame 61. The rotatable connection position is near the middle of the material inlet 12 along its height direction. One end of the second rotating frame 42 along its length is rotatably connected to the other end of the first rotating frame 41 along its length. Its rotation axis is also parallel to the rotation axis of the mounting frame 61, and its length is greater than that of the first rotating frame 41. Several second driving members 43 are installed at the other end of the second rotating frame 42 along its length, and are used to drive the end of the second rotating frame 42 away from the first rotating frame 41 to move horizontally and perpendicularly to the rotation axis of the mounting frame 61 above the ground. In this embodiment, the second driving member 43 is preferably a combination of a servo motor and a roller; and preferably, the loading / unloading device 4 includes two second driving members 43, and the two second driving members 43 are respectively installed at both ends of the width direction of the second rotating frame 42. Since the combination of a servo motor and roller with the above-mentioned functions is common prior art, it will not be described in detail here, and is only briefly shown in the accompanying drawings.

[0043] Furthermore, preferably, the second driving member 43 restricts the movement of the end of the second rotating frame 42 away from the first rotating frame 41 above the ground, and the loading / unloading device 4 remains in the cavity 131 during this process. When the second driving member 43 drives the end of the second rotating frame 42 away from the first rotating frame 41 to move towards the bottom of the frame 1 to its limit position, the first rotating frame 41 and the second rotating frame 42 will fold and be stored towards the bottom of the frame 1. When the second driving member 43 drives the end of the second rotating frame 42 away from the first rotating frame 41 to move towards the bottom of the frame 1 to its limit position, the first rotating frame 41 and the second rotating frame 42 will together form a structure that tilts downward towards the opening 132, which facilitates the operator to control the winding shaft 31 to complete the loading / unloading operation along the tilted structure formed by the first rotating frame 41 and the second rotating frame 42.

[0044] Furthermore, preferably, both sides of the first rotating frame 41 and the second rotating frame 42 in the width direction are provided with guide grooves 44 that are adapted to the driven wheel 311 along their length direction. When the second driving member 43 drives the end of the second rotating frame 42 away from the first rotating frame 41 to move to the limit position in the direction away from the bottom of the frame 1, the guide groove 44 will be located at the top of the first rotating frame 41 and the second rotating frame 42, and the guide groove 44 on the first rotating frame 41 will be aligned and connected with the guide groove 44 on the second rotating frame 42, so as to improve the positional stability of the winding shaft 31 in the process of completing the loading and unloading operation on the inclined structure.

[0045] Reference Figure 5 and Figure 6Furthermore, preferably, the fourth driving member 64 drives the mounting frame 61 to rotate in the following manner: the fourth driving member 64 drives the mounting frame 61 to rotate half a revolution each time, and after the fourth driving member 64 drives the mounting frame 61 to rotate, the mounting frame 61 will be in a position that is tilted downward in the direction of its length toward the feed port 12; and during the process of the fourth driving member 64 driving the mounting frame 61 to rotate, the position of the tilted upper end of the mounting frame 61 will first rise and then fall.

[0046] Reference Figure 3 and Figure 4 Furthermore, preferably, the third drive member 63 restricts the movement of the movable frame 62 relative to the mounting frame 61 during the process, and the third drive member 63 drives the movable frame 62 to move when the mounting frame 61 stops rotating.

[0047] Reference Figure 4 and Figure 7 When the third driving member 63 drives the movable frame 62 to move away from the feed port 12 to its limit position, the mounting frame 61 is in a position where it is controlled to rotate by the fourth driving member 64. At this time, the mounting device 6 maintains a distance from the driving device 5 and the cutting device 7 during the rotation of the mounting frame 61. When the third driving member 63 drives the movable frame 62 to move towards the feed port 12 to its limit position, the winding shaft 31 installed on the connecting structure 65 away from the feed port 12 can contact both driving wheels 51 simultaneously above the driving wheel 51 through the driven wheel 311 and be used for winding the fabric. At this time, the connecting structure 65 near the feed port 12 is located near the rotating connection between the first rotating frame 41 and the bottom of the frame 1, which makes it convenient for the operator to connect the winding shaft 31 to the connecting device through the loading and unloading device 4.

[0048] Reference Figure 5 and Figure 6 Furthermore, preferably, during the process of winding the fabric, the fabric to be wound will move in a downward direction toward the top of the winding shaft 31 and then be wound at the top of the winding shaft 31.

[0049] Reference Figure 4 and Figure 6 Furthermore, the preferred cutting device 7 is installed at the bottom of the frame 1 and located in the cavity 131, which is located on the side of the mounting frame 61 near the feed port 12, and includes a cutting blade 71 for cutting the fabric, a fifth drive member 72 for driving the cutting blade 71, and several air blowers 73 for improving the cutting and winding effect of the fabric.

[0050] One end of the cutting tool 71 is movably connected to the frame 1, and the other end is used to cut the fabric. Its direction of movement is parallel to the rotation axis of the mounting frame 61. The fifth drive member 72 is installed at the end of the cutting tool 71 that is movably connected to the frame 1, and it is used to control the movement of the cutting tool 71 relative to the frame 1. In this embodiment, the frame 1 preferably has a crossbar 14 in the inner cavity 11 for the cutting tool 71 to be movably mounted, and the crossbar 14 maintains a distance from the mounting device 6 as it moves with the mounting frame 61. Preferably, the fifth drive member 72 is a combination of a servo motor and a pulley, and the pulley slides in cooperation with the crossbar 14. Since the combination of a servo motor and a pulley with the above functions is a common prior art, it will not be described in detail here, and it is only briefly shown in the accompanying drawings.

[0051] Reference Figure 4 and Figure 7 After the fabric is wound on the winding shaft 31, the mounting device 6 is used to exchange its position with the winding shaft 31 on which the fabric is to be wound. Then the fabric wound on the winding shaft 31 is cut. At this time, the winding shaft 31 on which the fabric is to be wound will come into contact with the tensioned fabric during the previous movement with the mounting frame 61 and will be bonded to the fabric through the connecting piece 312 by rotating relative to the movable frame 62. At this time, the cutting tool 71 can cut the fabric located between the two winding shafts 31.

[0052] When the cutting tool 71 moves to its limit position away from the mounting bracket 61, the cutting tool 71 is in a retracted state. During the movement of the mounting device 6 with the mounting bracket 61, there is no positional interference between them. Then, as the cutting tool 71 moves to its limit position towards the mounting bracket 61, the cutting tool 71 will complete the cutting of the fabric.

[0053] Reference Figure 6 and Figure 7 An air blower 73 is fixedly installed on a crossbar 14. Several air blowers 73 are evenly distributed along the extension direction of the crossbar 14, and the air blowers 73 maintain a distance from the cutting blade 71 moving along the crossbar 14. During the cutting process, the air blower 73 continues to blow air towards the area of ​​the fabric to be cut, further tensioning the fabric for easier cutting and facilitating the downward movement of the cut end of the fabric to continue winding on the winding shaft 31. Afterwards, during the unloading process of the winding shaft 31, as it tilts and rolls downwards, the end of the fabric, under the action of inertia, continues to be wound on the winding roller and remains in a rolled state, improving the quality of the unloaded fabric roll. In this embodiment, since the air blower 73 with the above functions is common prior art, it will not be described in detail here, and only a brief representation is given in the accompanying drawings.

[0054] The implementation principle of a circular knitting machine according to an embodiment of this application is as follows: After the fabric is wound on the winding shaft 31 located at the inclined top, the loading and unloading device 4 is operated to put it in the position to be loaded and unloaded from the winding shaft 31. Then, the third driving member 63 is controlled to drive the movable frame 62 to move so that the driven wheel 311 of the winding shaft 31 is separated from the driving wheel 51. Then, the fourth driving member 64 is controlled to drive the mounting frame 61 to rotate half a turn. Then, the third driving member 63 is controlled to drive the movable frame 62 to move and reset so that the driven wheel 311 of the new winding shaft 31 contacts the two driving wheels 51 at the same time. At this time, the new winding shaft 31 will form an adhesive with the fabric through the connecting piece 312, and at the same time, the winding shaft 31 to be unloaded is brought close to the first rotating frame 41. Then, the fifth drive unit 72 drives the cutting tool 71 to cut the fabric, while several air blowers 73 blow air on the fabric to further tighten it and improve the cutting effect; after the fabric is cut, a new winding shaft 31 is wound to wind the fabric and the winding shaft 31 after the fabric is wound is unloaded. When the winding shaft 31 is unloaded, first disconnect the connection between the connecting structure 65 and the winding shaft 31. Then, the operator controls the winding shaft 31 to roll downwards along the loading and unloading device 4 to complete the unloading of the winding shaft 31. After that, control the new winding shaft 31 to roll upwards along the loading and unloading device 4. After the new winding shaft 31 is close to the connecting structure 65, control the connecting structure 65 to form a connection with it to complete the loading operation of the new winding shaft 31. Finally, operate the loading and unloading device 4 to put it in the storage state.

[0055] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A circular knitting machine for fabrics, comprising a frame (1) and a pull-and-wind mechanism (2), characterized in that, The pulling and winding mechanism (2) is located at the bottom of the frame (1). The bottom of the frame (1) has an inner cavity (11) for the pulling and winding mechanism (2) to be installed, and the inner cavity (11) has a material inlet (12) on one side of the bottom of the frame (1). The outer side of the frame (1) is provided with a enclosure structure (13) for protecting the pulling and winding mechanism (2). The enclosure structure (13) has a cavity (131) inside, and the inner cavity (11) communicates with the cavity (131) through the material inlet (12). The cavity (131) has an opening (132) on one side of the enclosure structure (13), and the enclosure structure (13) is provided with a protective door (133) for controlling the opening and closing of the opening (132). The pulling and winding mechanism (2) includes a winding device (3) for winding the fabric; the winding device (3) includes a winding shaft (31) and a first driving member (32), the winding shaft (31) is detachable and horizontally arranged in the inner cavity (11), and the first driving member (32) is used to drive the winding shaft (31) to rotate. The pulling and winding mechanism (2) also includes a loading and unloading device (4) for assisting the loading and unloading of the winding shaft (31); the loading and unloading device (4) is located at the bottom of the frame (1) near the material inlet (12), and includes a first rotating frame (41), a second rotating frame (42) and several second driving components (43). One end of the first rotating frame (41) is rotatably connected to the frame (1) and is located near the installation position of the winding shaft (31), and its rotation axis is parallel to the axis of rotation of the winding shaft (31) driven by the first driving member (32); one end of the second rotating frame (42) is rotatably connected to the other end of the first rotating frame (41), and its rotation axis is parallel to the rotation axis of the first rotating frame (41); the second driving member (43) is located at the end of the second rotating frame (42) away from the first rotating frame (41), and is used to drive the end of the second rotating frame (42) away from the first rotating frame (41) to move on the ground; When the second drive member (43) drives the second rotating frame (42) to move to the limit position in a direction away from the frame (1), the second rotating frame (42) approaches the opening (132), and the first rotating frame (41) and the second rotating frame (42) together form a structure that is inclined downward in a direction close to the opening (132).

2. The circular knitting machine according to claim 1, characterized in that, The pulling and winding mechanism (2) further includes a driving device (5) for the first driving member (32) to drive the winding shaft (31) to rotate, an installation device (6) for the winding shaft (31) to be detachably installed, and a cutting device (7) for cutting the fabric. The driving device (5) includes a plurality of driving wheels (51); both ends of the winding shaft (31) are provided with driven wheels (311). After the winding shaft (31) is installed, one of the driven wheels (311) contacts the driving wheel (51). The first driving member (32) drives the driving wheel (51) to rotate, which in turn drives the winding shaft (31) to rotate. The mounting device (6) includes a mounting frame (61), a movable frame (62), and a third drive component (63); the mounting frame (61) is located at the bottom of the frame (1), the movable frame (62) is movably mounted on the mounting frame (61), and the movable frame (62) is provided with a plurality of connecting structures (65) for detachably rotating the winding shaft (31); the direction of movement of the movable frame (62) is perpendicular to the rotation axis of the installed winding shaft (31), and the third drive component (63) is located on the mounting frame (61) and is used to control the movement of the movable frame (62); The cutting device (7) is located at the bottom of the frame (1) and in the inner cavity (11), and it cuts the fabric above the winding shaft (31) after the fabric is wound.

3. A circular knitting machine according to claim 2, characterized in that, The mounting device (6) also includes a fourth drive element (64). The mounting bracket (61) is rotatably connected to the frame (1), and its rotation axis is parallel to the rotation axis of the installed winding shaft (31). The fourth driving member (64) is used to drive the mounting bracket (61) to rotate. The movable frame (62) is provided with the connecting structure (65) at both ends along its moving direction. After the fourth driving member (64) drives the mounting frame (61) to rotate, the two connecting structures (65) are located above and below the driving wheel (51) respectively. The connecting structure (65) located above is for the installation of the winding shaft (31) to be wound with the fabric, and the connecting structure (65) located below is for the installation of the winding shaft (31) to be loaded and unloaded.

4. A circular knitting machine according to claim 3, characterized in that, After the fourth driving member (64) drives the mounting frame (61) to rotate, the mounting frame (61) tilts downward toward the material port (12); at this time, when the movable frame (62) moves to the limit position toward the material port (12), the winding shaft (31) installed on the upper connecting structure (65) is driven to rotate by the driving device (5), and the winding shaft (31) installed on the lower connecting structure (65) is close to the first rotating frame (41).

5. A circular knitting machine according to claim 4, characterized in that, The surface of the winding shaft (31) is provided with a plurality of connecting pieces (312) for bonding the fabric; during the rotation of the mounting frame (61), the winding shaft (31) contacts the tensioned fabric and then rotates to bond the connecting pieces (312) to the fabric.

6. A circular knitting machine according to claim 5, characterized in that, During the process of the winding shaft (31) winding the fabric, the fabric to be wound is located above the winding shaft (31).

7. A circular knitting machine according to claim 6, characterized in that, The cutting device (7) includes a cutting blade (71) and a fifth driving member (72). The cutting tool (71) is movably mounted on the frame (1), and its direction of movement is parallel to the rotation axis of the installed winding shaft (31). The fifth driving member (72) is used to drive the cutting tool (71) to move. After the fourth drive member (64) drives the mounting bracket (61) to rotate, the cutting tool (71) is located on the side of the mounting bracket (61) near the feed opening (12) and between the two connecting structures (65), and it is used to cut the fabric on the side of the fabric near the feed opening (12).

8. A circular knitting machine according to claim 7, characterized in that, The cutting device (7) also includes several air blowers (73); The air blower (73) is mounted on the frame (1), and a plurality of the air blowers (73) are spaced apart along the direction of movement of the cutting tool (71), and the air blower (73) is used to blow air toward the cutting position on the fabric.

9. A circular knitting machine according to claim 2, characterized in that, The drive device (5) includes two drive wheels (51), which rotate synchronously and in the same direction through a timing belt (52), and one of the driven wheels (311) of the installed winding shaft (31) simultaneously contacts the two drive wheels (51).

10. A circular knitting machine according to claim 2, characterized in that, Both the first rotating frame (41) and the second rotating frame (42) are provided with guide grooves (44) that are adapted to the driven wheel (311). When the second rotating frame (42) moves to the limit position in a direction away from the frame (1), the guide grooves (44) on the first rotating frame (41) and the guide grooves (44) on the second rotating frame (42) are aligned and communicate with each other.

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