Winding device for food-grade woven bag production and processing

Abstract

The invention discloses a food-grade woven bag production and processing winding device which comprises a base, a first vertical rod, a second vertical rod, a third vertical rod, a winding roller, a supporting roller and a tensioning roller, a tensioning mechanism is arranged, a second belt wheel and an oval groove are matched, the tensioning roller is driven to do lifting reciprocating motion, dynamic adjustment of the tensile force of a woven bag is achieved, and the woven bag production and processing efficiency is improved. According to the woven bag take-up device, the woven bag can be kept in a proper tensioning state in the take-up process, an air blowing mechanism can blow air or suck air to the two sides of the woven bag in the lifting process of a tensioning roller through cooperation of an L-shaped air blowing hole and a piston plate, the woven bag is helped to be flatly laid on the tensioning roller, wrinkles are reduced, and loosening is prevented; the fitting degree of the arc-shaped rod and the winding roller is automatically adjusted, bubbles and wrinkles generated in the winding process are effectively eliminated, the winding flatness of the woven bag is improved, and the winding quality and efficiency of the food-grade woven bag can be remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of food-grade woven bag production and processing, and specifically to a winding device for food-grade woven bag production and processing. Background Art

[0002] Food-grade woven bags are a type of flexible packaging material widely used in food packaging. Due to their good air permeability, corrosion resistance, and cost-effectiveness, they are used to package various foods. Woven bags are generally made mainly from various chemical plastic raw materials such as polyethylene and polypropylene. They are extruded and stretched into flat filaments, and then woven, knitted, and made into bags. After the woven bag is knitted, it needs to be wound for storage or transportation. The winding process is one of the important steps in the production process of woven bags. It not only determines the appearance quality of the woven bag but also affects its subsequent use performance. The performance of the winding device directly affects the flatness, stability, and winding efficiency of the woven bag, and thus affects the quality and safety of food packaging.

[0003] The existing Chinese patent with the publication number CN113277349B includes a winding mechanism and a fixing mechanism. The winding mechanism is installed on the ground, and the fixing mechanism is arranged on the left side of the winding mechanism. The winding mechanism includes a first vertical frame, a transmission roller, a second vertical frame, a conveying roller, a vertical frame, a winding roller, a motor, a frame, a first electric slider, a connecting plate, a limiting plate, and an indicating plate. The first vertical frames are symmetrically installed on the ground front and back. A transmission roller is rotatably connected between the upper ends of the first vertical frames. Second vertical frames are arranged on the left sides of the first vertical frames. The second vertical frames are installed on the ground. A conveying roller is rotatably connected between the upper ends of the second vertical frames. A vertical frame is arranged on the left side of the conveying roller. The vertical frame is installed on the ground. A winding roller is rotatably connected to the upper end of the vertical frame.

[0004] When the above device is in use, a single power source is used to form a double-strip woven bag winding working line, thereby greatly improving the overall winding efficiency of the woven bag. The set winding mechanism can accurately adjust the total forming thickness of the woven bag roll according to the forming requirements, thereby improving the diversity of device forming. However, in the actual use process, most existing winding devices use a constant tension force to maintain the tension state of the woven bag during winding. The fixed tension force method is likely to cause problems such as wrinkles, looseness, and deformation of the woven bag during winding, affecting the winding quality of the woven bag. Therefore, it is difficult to dynamically adjust the tension force of the woven bag during winding.

[0005] Therefore, we propose a winding device for food-grade woven bag production and processing. Summary of the Invention

[0006] The object of the present invention is to provide a winding device for the production and processing of food-grade woven bags, which has the advantage of dynamically adjusting the tension of the woven bag during the winding process, and solves the problems in the background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: A winding device for the production and processing of food-grade woven bags, including a base supported and placed on the ground. On both sides of one end of the base, first vertical rods are symmetrically and fixedly connected. On the opposite surfaces of the two first vertical rods, a winding roller driven by a power mechanism to rotate is penetrated and rotatably connected by a fixed axis. And on both sides of the other end of the base far from the first vertical rod, second vertical rods are symmetrically and fixedly connected. On the opposite surfaces of the two second vertical rods, a support roller for supporting the woven bag is penetrated and rotatably connected by a fixed axis. On both sides of one end of the base close to the winding roller, third vertical rods are symmetrically and fixedly connected. Inside the inner walls of the two third vertical rods, lifting blocks are connected by lifting and moving. On the opposite surfaces of the two lifting blocks, a tension roller for supporting the tension of the woven bag is penetrated and fixedly connected. A tensioning mechanism for driving the tension roller to dynamically adjust the tension of the woven bag is provided on the third vertical rod.

[0008] Preferably, the tensioning mechanism includes a second pulley rotatably connected by a fixed axis through one of the third vertical rods. An oval groove for pulling the tension roller to move up and down reciprocally is provided on the second pulley. Inside the inner walls of the two lifting blocks, a U-shaped frame is fixedly connected. And the bottom end of the U-shaped frame penetrates to the inner wall of the oval groove and is movably connected.

[0009] Preferably, one end of the winding roller close to the second pulley is coaxially fixedly connected with a first pulley. A transmission belt for driving the second pulley to rotate by a fixed axis is sleeved in the chute on the outer contours of the first pulley and the second pulley.

[0010] Preferably, L-shaped air blowing holes for blowing air on both sides of the woven bag are provided at symmetric positions at both ends of the tension roller. L-shaped hole grooves communicating with the L-shaped air blowing holes are provided on both sides of the two lifting blocks. The ends of the two L-shaped hole grooves are penetrated and fixedly connected with an air pipe. A blowing mechanism for making the L-shaped air blowing holes blow air on both sides of the woven bag is provided on the third vertical rod.

[0011] Preferably, the blowing mechanism includes cylindrical shells fixedly connected to the inner walls of the ends of the two third vertical rods. Piston plates for blowing or sucking air on the woven bag on the tension roller are fixedly connected to the outer contours of the two air pipes close to the ends. Each piston plate penetrates to the inner wall of the adjacent cylindrical shell on one side and is movably connected.

[0012] Preferably, cylindrical rods are fixedly connected to the opposite surfaces of the two first vertical rods near the ends. A flattening mechanism for flattening the woven bag on the winding roller is provided on the cylindrical rods. The flattening mechanism includes moving blocks that are horizontally movably connected to the outer contours at symmetric positions at both ends of the cylindrical rod. The two moving blocks are both penetrated and movably connected with arc-shaped rods for flattening the woven bag on the winding roller. Fixed plates are fixedly connected to the outer contours of the two arc-shaped rods near the ends. Springs for guiding the arc-shaped rods to move back and forth are fixedly connected to the opposite surfaces of each fixed plate and the moving block.

[0013] Preferably, a moving mechanism for pushing the arc-shaped rods to move towards or away from each other for flattening is provided on the first vertical rod. The moving mechanism includes support grooves that are respectively formed on the opposite surfaces of the two ends of the first vertical rod. The inner walls of the two support grooves are connected with a moving rod in a lifting and moving manner. First connecting seats are fixedly connected to the symmetric positions at both ends of the bottom of the moving rod. Adjusting rods for pushing the moving blocks to move towards or away from each other are coaxially rotatably connected to the two first connecting seats. Second connecting seats are fixedly connected to the ends of the two moving blocks. The bottom ends of the two adjusting rods are respectively rotatably connected to the adjacent second connecting seats through pins.

[0014] Preferably, movable grooves are respectively formed on one side of the two third vertical rods close to the moving rod. The inner walls of the two movable grooves are connected with a support rod in a lifting and moving manner. The two ends of each support rod are respectively fixedly connected to the adjacent lifting block and the moving rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: First, through the cooperation of the oval groove and the U-shaped frame, the lifting position of the tensioning roller can be adjusted in real time, realizing the dynamic adjustment of the tension of the woven bag. During the winding process, the dynamic adjustment of the tension can effectively avoid problems such as the woven bag being stretched and deformed due to excessive tension, or the woven bag having wrinkles and looseness due to too small tension. By reasonably controlling the tension, the woven bag always maintains an appropriate tight state during winding, reducing wrinkles and unevenness caused by relaxation, enabling the winding roller to complete winding in the best tension state of the woven bag, significantly improving the flatness and stability of winding, and ensuring the appearance quality and subsequent use performance of the woven bag.

[0016] II. Blow air on both sides of the woven bag through the L-shaped air holes. When the tensioning roller moves upward to increase the tension, the blowing mechanism can blow flat the wrinkles and bubbles on the surface of the woven bag, making the woven bag fit more smoothly on the tensioning roller, guiding the woven bag to be laid flat on the tensioning roller, and further improving the flatness of the winding of the woven bag by the winding roller. When the tensioning roller moves downward to reduce the tension, the blowing mechanism tightly adsorbs the woven bag on the surface of the tensioning roller by suction, preventing the woven bag from loosening or shifting during the winding process, enabling the woven bag to fit tightly on the tensioning roller, ensuring the stability of the woven bag during the winding process, and avoiding problems such as unstable winding and subsequent use caused by wrinkles and bubbles, significantly improving the winding quality of the woven bag.

[0017] III. Through the close fit of the arc-shaped rod with the outer contour of the winding roller, and the arc-shaped rods are arranged in a V-shape at both ends of the winding roller, the bubbles and wrinkles on the surface of the woven bag can be guided and smoothed to both sides. The design of the arc-shaped rod makes the smoothing operation more uniform and effective, significantly reducing the wrinkles and bubbles on the surface of the woven bag and improving the appearance quality of the woven bag.

[0018] Due to the fact that the radius of the winding roller gradually increases during the winding process, the arc-shaped rod pulls the fixed plate to move away from the moving block, and the spring is stretched, ensuring that the arc-shaped rod always closely fits the outer contour of the winding roller and ensuring that the arc-shaped rod can continuously smooth the woven bag.

[0019] IV. Through the cooperation of the adjusting rod and the moving block, the arc-shaped rod can be pushed to move towards or away from each other, further enhancing the smoothing effect. When the lifting block drives the tensioning roller to move up and down reciprocally, the support rod drives the moving rod to move up and down synchronously. The moving rod pushes the moving block to move reciprocally towards and away from each other on the cylindrical rod through the adjusting rod, and then drives the arc-shaped rod to move reciprocally on the outer contour of the winding roller, smoothing the bubbles and wrinkles on the surface of the woven bag to both sides, further improving the overall quality and stability of the winding of the woven bag.

[0020] By using the above-mentioned structural cooperation, the problem is solved that in the actual use process of the existing device, most of the existing winding devices use a constant tension to maintain the tension state of the woven bag during the winding process. The fixed tension method is prone to problems such as wrinkles, loosening, and deformation of the woven bag during the winding process, affecting the winding quality of the woven bag. Therefore, it is difficult to dynamically adjust the tension of the woven bag during the winding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a three-dimensional structural schematic diagram of the part where the winding roller is located in the present invention; Figure 3 for the present invention Figure 1Schematic diagram of the structure at position A in [the invention]; Figure 4 Schematic three - dimensional structure diagram of the part where the tensioning roller of the present invention is located; Figure 5 For the present invention Figure 4 Schematic diagram of the structure at position B in [the invention]; Figure 6 Schematic cross - sectional view of the three - dimensional structure of the part where the tensioning roller of the present invention is located; Figure 7 For the present invention Figure 6 Schematic diagram of the structure at position C in [the invention]; Figure 8 Schematic three - dimensional structure diagram of the part where the arc - shaped rod of the present invention is located; Figure 9 Schematic cross - sectional view of the three - dimensional structure of the cylindrical housing of the present invention.

[0022] In the figure: 1. Base; 2. First vertical rod; 201. Support groove; 3. Winding roller; 4. Second vertical rod; 5. Support roller; 6. Third vertical rod; 601. Movable groove; 7. Lifting block; 701. L - shaped hole groove; 8. Tensioning roller; 801. L - shaped air blowing hole; 9. First pulley; 10. Second pulley; 101. Oval groove; 11. Transmission belt; 12. U - shaped frame; 13. Vent pipe; 14. Cylindrical housing; 15. Piston plate; 16. Cylindrical rod; 17. Moving block; 18. Arc - shaped rod; 19. Fixed plate; 20. Spring; 21. Moving rod; 22. First connecting seat; 23. Adjusting rod; 24. Second connecting seat; 25. Support rod. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0024] Embodiment 1

[0025] Please refer to Figures 1 to 9, the present invention provides a technical solution: a winding device for the production and processing of food-grade woven bags, including a base 1 supported on the ground. On both sides of one end of the base 1, there are symmetrically fixed first vertical rods 2. On the opposite surfaces of the two first vertical rods 2, there is a through hole and a rotatable connection with a winding roller 3 driven by a power mechanism. On both sides of the end of the base 1 far from the first vertical rod 2, there are symmetrically fixed second vertical rods 4. On the opposite surfaces of the two second vertical rods 4, there is a through hole and a rotatable connection with a support roller 5 for supporting the woven bag. On both sides of the end of the base 1 close to the winding roller 3, there are symmetrically fixed third vertical rods 6. Inside the inner walls of the two third vertical rods 6, there are lifting and moving connections with lifting blocks 7. On the opposite surfaces of the two lifting blocks 7, there is a through hole and a fixed connection with a tensioning roller 8 for supporting the tension of the woven bag. On the third vertical rod 6, there is a tensioning mechanism for driving the tensioning roller 8 to dynamically adjust the tension of the woven bag.

[0026] When in use, by setting the base 1, the base 1 is supported on the ground to improve the stability of the winding device. Through the first vertical rod 2 provided on the base 1, the first vertical rod 2 is fixedly supported on the base 1. Through the winding roller 3 provided on the first vertical rod 2, and the winding roller 3 is driven to rotate by an electrified motor, the motor can drive the winding roller 3 to rotate to wind the woven bag. Through the second vertical rod 4 provided on the base 1, and the support roller 5 provided on the second vertical rod 4, the second vertical rod 4 can fixedly support the support roller 5 on the base 1, and the support roller 5 is rotationally connected on the second vertical rod 4. Along with the winding of the woven bag by the winding roller 3, the support roller 5 can rotate automatically under the pulling of the woven bag to ensure the stability of the woven bag during the winding process.

[0027] Through the third vertical rod 6 provided on the base 1, the third vertical rod 6 is fixedly supported on the base 1. Through the lifting block 7 provided on the third vertical rod 6, and the tensioning roller 8 provided on the lifting block 7, the lifting block 7 can drive the tensioning roller 8 to perform a lifting and moving connection inside the inner wall of the third vertical rod 6. First, the tensioning roller 8 supports the woven bag at the top. Along with the winding of the woven bag by the winding roller 3, the tensioning roller 8 can support the tension of the woven bag during winding under the action of the winding roller 3 and the support roller 5 to improve the winding quality of the woven bag. Through the tensioning mechanism provided on the third vertical rod 6, and the lifting block 7 drives the tensioning roller 8 to perform a lifting and moving connection on the third vertical rod 6, the tensioning mechanism can drive the tensioning roller 8 to perform a reciprocating lifting adjustment, realizing the dynamic adjustment of the tension of the woven bag during winding by the tensioning roller 8.

[0028] Embodiment Two

[0029] On the basis of Embodiment One, further: The tensioning mechanism includes a second pulley 10 that is penetrated and rotatably connected to one of the third vertical rods 6. An oval groove 101 for pulling the tensioning roller 8 to move up and down reciprocally is provided on the second pulley 10. The inner walls of the two lifting blocks 7 are fixedly connected with a U-shaped frame 12, and the bottom end of the U-shaped frame 12 penetrates to the inner wall of the oval groove 101 and is movably connected.

[0030] One end of the winding roller 3 close to the second pulley 10 is coaxially fixedly connected with a first pulley 9. A transmission belt 11 for driving the second pulley 10 to rotate about a fixed axis is sleeved in a chute on the outer contours of the first pulley 9 and the second pulley 10.

[0031] During use, due to the second pulley 10 provided on the third vertical rod 6, the second pulley 10 is rotatably connected to the third vertical rod 6 about a fixed axis. Due to the first pulley 9 provided on the winding roller 3, and the first pulley 9 is coaxially fixedly connected with the winding roller 3. As the winding roller 3 rotates to wind the woven bag, the winding roller 3 can drive the first pulley 9 to rotate about a fixed axis synchronously. And there is a transmission belt 11 between the first pulley 9 and the second pulley 10. Thus, the transmission belt 11 can drive the second pulley 10 to rotate about a fixed axis on the third vertical rod 6 synchronously under the action of the first pulley 9.

[0032] Due to the U-shaped frame 12 provided on the lifting block 7, first, the U-shaped frame 12 is fixedly supported on the lifting block 7. Due to the oval groove 101 provided on the second pulley 10, and the U-shaped frame 12 is movably supported on the inner wall of the oval groove 101. As the second pulley 10 rotates about a fixed axis, the U-shaped frame 12 can pull the tensioning roller 8 to move up and down reciprocally through the lifting block 7 under the action of the oval groove 101. When the tensioning roller 8 moves in the upward vertical direction, at this time, the tensioning force of the winding roller 3 for winding the woven bag increases, keeping the woven bag in a certain tight state, reducing wrinkles and unevenness of the woven bag caused by relaxation during winding. When the tensioning roller 8 moves in the downward vertical direction, the tensioning force of the winding roller 3 for winding the woven bag decreases, avoiding the problem that the woven bag is stretched and deformed or even damaged under the action of excessive tension for a long time, and improving the tightness and quality of the winding roller 3 for winding the woven bag.

[0033] Embodiment 3

[0034] On the basis of Embodiment 2, further: At both ends of the tensioning roller 8 at symmetrical positions, L-shaped air blowing holes 801 for blowing air on both sides of the woven bag are provided. L-shaped hole grooves 701 communicating with the L-shaped air blowing holes 801 are provided on both sides of the lifting blocks 7. The ends of the two L-shaped hole grooves 701 are penetrated and fixedly connected with an air pipe 13. A blowing mechanism for blowing air on both sides of the woven bag through the L-shaped air blowing holes 801 is provided on the third vertical rod 6.

[0035] The blowing mechanism includes cylindrical shells 14 fixedly connected to the inner walls of the ends of two third vertical rods 6. Piston plates 15 for blowing or sucking air on the woven bag on the tensioning roller 8 are fixedly connected to the outer contours of the two air pipes 13 near the ends. Each piston plate 15 penetrates to the inner wall of the adjacent cylindrical shell 14 and is movably connected.

[0036] During use, through the L-shaped air blowing holes 801 provided on the tensioning roller 8 and the L-shaped hole grooves 701 provided on the lifting blocks 7, the L-shaped air blowing holes 801 can be communicated with the L-shaped hole grooves 701. And with the air pipe 13 provided on the L-shaped hole grooves 701, the air pipe 13 is communicated with the L-shaped air blowing holes 801 and the L-shaped hole grooves 701. Through the cylindrical shells 14 provided on the third vertical rod 6, the cylindrical shells 14 are fixedly supported on the third vertical rod 6. And with the piston plates 15 provided on the cylindrical shells 14, along with the lifting blocks 7 driving the tensioning roller 8 to move up and down reciprocally, the lifting blocks 7 can push the air pipe 13 and the piston plates 15 to move up and down reciprocally synchronously on the inner walls of the cylindrical shells 14.

[0037] When the lifting block 7 drives the tensioning roller 8 to move upward to increase the tension of the woven bag, and the air pipe 13 can push the piston plate 15 to move towards the end of the cylindrical shell 14, so that the internal air pressure at the top of the cylindrical shell 14 is in a positive pressure state. At this time, the air pipe 13 can discharge the air at the end of the cylindrical shell 14 through the L-shaped hole groove 701 and the L-shaped air blowing hole 801. Thus, the L-shaped air blowing holes 801 can blow air on both sides of the woven bag on the tensioning roller 8, guiding the woven bag to be laid flat on the tensioning roller 8, further improving the flatness of the winding of the woven bag by the winding roller 3. When the lifting block 7 drives the tensioning roller 8 to move downward to reduce the tension of the woven bag, the air pipe 13 can pull the piston plate 15 to move back to the bottom end of the cylindrical shell 14 for reset. And the internal air pressure at the top of the cylindrical shell 14 is in a negative pressure state, so that the air pipe 13 sucks external air into the cylindrical shell 14 through the L-shaped hole groove 701 and the L-shaped air blowing hole 801. And the L-shaped air blowing holes 801 apply suction to the woven bag on the tensioning roller 8, enabling the woven bag to closely adhere to the surface of the tensioning roller 8, improving the stability of the woven bag during the winding process, avoiding the problems of loosening or deviation of the woven bag during the winding process, and ensuring the quality of the winding of the woven bag.

[0038] Embodiment Four

[0039] On the basis of Embodiment 3, further: Cylindrical rods 16 are fixedly connected to the opposite surfaces of the two first vertical rods 2 near the ends. A flattening mechanism for flattening the woven bag on the winding roller 3 is provided on the cylindrical rods 16. The flattening mechanism includes moving blocks 17 horizontally movably connected to the outer contours at symmetrical positions at both ends of the cylindrical rod 16. The two moving blocks 17 are both penetrated and movably connected with arc-shaped rods 18 for flattening the woven bag on the winding roller 3. Fixed plates 19 are fixedly connected to the outer contours of the two arc-shaped rods 18 near the ends. Springs 20 for guiding the reset movement of the arc-shaped rods 18 are fixedly connected to the opposite surfaces of each fixed plate 19 and the moving block 17.

[0040] During use, through the cylindrical rods 16 provided on the first vertical rods 2, the cylindrical rods 16 are fixedly supported on the first vertical rods 2, and the moving blocks 17 provided on the cylindrical rods 16 enable the moving blocks 17 to be horizontally movably connected to the outer contour of the cylindrical rods 16. Through the arc-shaped rods 18 provided on the moving blocks 17, the arc-shaped rods 18 are telescopically movably connected to the moving blocks 17, and the arc-shaped rods 18 are in contact with the outer contour of the winding roller 3 and arranged in a V shape. As the winding roller 3 winds the woven bag, the tensioning roller 8 can guide the woven bag to be laid flat on the outer contour of the winding roller 3, further enhancing the stability and quality of the winding of the winding roller 3.

[0041] Through the fixed plates 19 provided on the arc-shaped rods 18 and the springs 20 provided on the fixed plates 19, the fixed plates 19 can support the arc-shaped rods 18 under the action of the springs 20. As the radius of the winding roller 3 gradually increases during the winding process, the arc-shaped rods 18 can pull the fixed plates 19 to move horizontally away from the moving blocks 17 for adjustment, ensuring that the arc-shaped rods 18 are always in contact with the outer contour of the winding roller 3, and the springs 20 are stretched under the pull of the fixed plates 19, so that the springs 20 can pull the arc-shaped rods 18 to move in the reset direction through the fixed plates 19 later, improving the flexibility of the arc-shaped rods 18.

[0042] Embodiment 5

[0043] On the basis of Embodiment 4, further: A moving mechanism for pushing the arc-shaped rod 18 to move towards or away from each other for flattening is provided on the first vertical rod 2. The moving mechanism includes support grooves 201 formed on the opposite surfaces of the two ends of the first vertical rod 2. The inner walls of the support grooves 201 on both sides are connected with a moving rod 21 in a lifting and moving manner. At the symmetric positions at both ends of the bottom of the moving rod 21, first connection seats 22 are fixedly connected. On both ends of the first connection seats 22, adjusting rods 23 for pushing the moving blocks 17 to move towards or away from each other are coaxially rotatably connected. The ends of the two moving blocks 17 are fixedly connected with second connection seats 24. The bottom ends of the two adjusting rods 23 are respectively rotatably connected to the second connection seats 24 at the adjacent ends through pins.

[0044] On the side of the two third vertical rods 6 close to the moving rod 21, activity grooves 601 are formed on both sides. The inner walls of the activity grooves 601 on both sides are connected with support rods 25 in a lifting and moving manner. The two ends of each support rod 25 are respectively fixedly connected to the lifting blocks 7 and the moving rod 21 on the adjacent side.

[0045] During use, through the support grooves 201 formed on the first vertical rod 2 and the moving rod 21 arranged on the support grooves 201, the moving rod 21 can be connected to the inner wall of the support groove 201 in a lifting and moving manner. Through the activity grooves 601 formed on the third vertical rod 6 and the support rods 25 arranged on the activity grooves 601, the activity grooves 601 can support the moving direction of the support rods 25, and the support rods 25 are fixedly connected to the lifting blocks 7 and the moving rod 21. Along with the reciprocating lifting movement of the lifting blocks 7, the support rods 25 can drive the moving rod 21 to perform synchronous reciprocating lifting movement under the action of the lifting blocks 7.

[0046] Through the first connection seats 22 and the second connection seats 24 arranged on the moving rod 21 and the moving blocks 17, the first connection seats 22 and the second connection seats 24 are respectively fixedly supported on the moving rod 21 and the moving blocks 17. And the adjusting rods 23 arranged on the first connection seats 22 and the second connection seats 24 enable the two ends of the adjusting rods 23 to be rotatably supported on the first connection seats 22 and the second connection seats 24. Along with the reciprocating lifting movement of the moving rod 21, the adjusting rods 23 can push the moving blocks 17 at both ends to perform reciprocating movement towards or away from each other on the cylindrical rod 16 under the action of the moving rod 21. Furthermore, the moving blocks 17 can drive the arc-shaped rod 18 to perform synchronous reciprocating movement towards and away from each other on the outer contour of the winding roller 3, realizing that the arc-shaped rod 18 can flatten the air bubbles and wrinkles on the surface of the woven bag on the outer contour of the winding roller 3 to both sides, improving the flattening effect of the arc-shaped rod 18 on the woven bag and ensuring the quality of the winding of the woven bag by the winding roller 3.

[0047] Furthermore, it is realized that during the actual use of the existing device, the tension of the woven bag can be dynamically adjusted during the winding process, which is convenient to use and better than traditional products.

[0048] The standard parts used in this embodiment can be directly purchased from the market. For the non-standard structural components described in the specification and drawings, they can also be directly processed without doubt according to the existing common technical knowledge. At the same time, the connection methods of each component adopt the mature conventional means in the existing technology, and the machines, parts and equipment all adopt the conventional models in the existing technology. Therefore, no specific description will be made here.

[0049] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A winding device for the production and processing of food-grade woven bags, characterized in that: It includes a base (1) for supporting and placing on the ground. On both sides of one end of the base (1) at symmetric positions, first vertical rods (2) are fixedly connected. On the opposite surfaces of the two first vertical rods (2), a winding roller (3) driven to rotate by a power mechanism is penetrated and rotatably connected in a fixed axis. And on both sides of the end of the base (1) far from the first vertical rods (2) at symmetric positions, second vertical rods (4) are fixedly connected. On the opposite surfaces of the two second vertical rods (4), a support roller (5) for supporting the woven bag is penetrated and rotatably connected in a fixed axis. On both sides of the end of the base (1) close to the winding roller (3) at symmetric positions, third vertical rods (6) are fixedly connected. Inside the inner walls of the two third vertical rods (6), lifting blocks (7) are connected with lifting and moving. On the opposite surfaces of the two lifting blocks (7), a tensioning roller (8) for supporting the tension of the woven bag is penetrated and fixedly connected. On the third vertical rods (6), a tensioning mechanism is provided to drive the tensioning roller (8) to dynamically adjust the tension of the woven bag.

2. The rewinding device for the production and processing of a food-grade woven bag according to claim 1, characterized in that: The tensioning mechanism includes that on one of the third vertical rods (6), a second pulley (10) is penetrated and rotatably connected in a fixed axis. An oval groove (101) for pulling the tensioning roller (8) to move up and down reciprocally is formed on the second pulley (10). Inside the inner walls of the two lifting blocks (7), a U-shaped frame (12) is fixedly connected. And the bottom end of the U-shaped frame (12) penetrates to the inner wall of the oval groove (101) and is movably connected.

3. A winding device for the production and processing of food-grade woven bags according to claim 1, characterized in that: One end of the winding roller (3) close to the second pulley (10) is coaxially fixedly connected with a first pulley (9). A transmission belt (11) for driving the second pulley (10) to rotate in a fixed axis is sleeved in the chute on the outer contours of the first pulley (9) and the second pulley (10).

4. The rewinding device for the production and processing of a food-grade woven bag according to claim 2, characterized in that: On both sides of the tensioning roller (8) at symmetric positions, L-shaped air blowing holes (801) for blowing air on both sides of the woven bag are formed. On both sides of the two lifting blocks (7), L-shaped hole grooves (701) communicated with the L-shaped air blowing holes (801) are formed. The ends of the two L-shaped hole grooves (701) are penetrated and fixedly connected with an air pipe (13). On the third vertical rods (6), a blowing mechanism is provided to make the L-shaped air blowing holes (801) blow air on both sides of the woven bag.

5. A rewinding device for the production and processing of food-grade woven bags according to claim 4, characterized in that: The blowing mechanism includes that on the inner walls of the ends of the two third vertical rods (6), cylindrical shells (14) are fixedly connected. On the outer contours of the two air pipes (13) close to the ends, piston plates (15) for blowing or sucking air on the woven bag on the tensioning roller (8) are fixedly connected. Each piston plate (15) on each side penetrates to the inner wall of the adjacent cylindrical shell (14) and is movably connected.

6. The rewinding device for the production and processing of a food-grade woven bag according to claim 1, characterized in that: On the opposite faces of the two first vertical rods (2) near the ends, there are fixedly connected cylindrical rods (16). On the cylindrical rods (16), there is a flattening mechanism for flattening the woven bags on the winding rollers (3). The flattening mechanism includes that on the outer contours at the symmetric positions at both ends of the cylindrical rod (16), there are horizontally movably connected moving blocks (17). The two moving blocks (17) are both penetrated and movably connected with arc-shaped rods (18) for flattening the woven bags on the winding rollers (3). On the outer contours of the two arc-shaped rods (18) near the ends, there are fixedly connected fixing plates (19). On the opposite faces of each fixing plate (19) and the moving block (17), there are fixedly connected springs (20) for guiding the arc-shaped rod (18) to move back and forth.

7. A rewinding device for the production and processing of food-grade woven bags according to claim 6, characterized in that: On the first vertical rod (2), there is a moving mechanism for pushing the arc-shaped rods (18) to move towards or away from each other for flattening. The moving mechanism includes that on the opposite faces at the ends of the two first vertical rods (2), there are respectively provided support grooves (201). The inner walls of the two support grooves (201) are connected with a moving rod (21) in a lifting and moving manner. At the symmetric positions at both ends of the bottom of the moving rod (21), there are respectively fixedly connected first connection seats (22). On the two first connection seats (22), there are coaxially rotatably connected adjusting rods (23) for pushing the moving blocks (17) to move towards or away from each other. At the ends of the two moving blocks (17), there are respectively fixedly connected second connection seats (24). The bottom ends of the two adjusting rods (23) are respectively rotatably connected with the second connection seat (24) at the adjacent end through pins.

8. A winding device for the production and processing of a food-grade woven bag according to claim 5, characterized in that: On one side of the two third vertical rods (6) close to the moving rod (21), there are respectively provided movable grooves (601). The inner walls of the two movable grooves (601) are connected with support rods (25) in a lifting and moving manner. The two ends of each support rod (25) are respectively fixedly connected with the lifting block (7) and the moving rod (21) at the adjacent side.

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