Cloth pulling device with adjusting function

Abstract

The utility model relates to the field of textile equipment, concretely relates to cloth pulling device with adjusting function, it includes first pulling roller, second pulling roller, third pulling roller, fourth pulling roller, drive assembly, first vision detection unit, second vision detection unit, negative pressure unit and electric control system. The utility model uses first vision detection unit and second vision detection unit to gather actual flattening state information and actual offset state information respectively when pulling, carries out analysis comparison processing by electric control system and pre -set reference information, and instructs negative pressure unit to provide same or different pressure's negative pressure airflow to the left and right two independent compartments inside first pulling roller or only provides negative pressure airflow to one compartment, comes the pulling tension of dynamic adjustment cloth or limit cloth lateral offset, improves cloth pulling flattening effect or avoids cloth lateral deviation, thereby can improve product quality and the stability of production operation.

Description

Technical Field

[0001] This utility model relates to the field of textile equipment, specifically to a fabric pulling device with an adjustable function. Background Technology

[0002] The fabric tensioning device is a crucial unit in the finishing section of a high-speed warp knitting machine. After being tensioned and flattened, the fabric's weaving defects caused by yarn slack, uneven texture, or wrinkles are reduced, thus improving product quality. Most current tensioning devices utilize multiple fixed-position tension rollers. The fabric wraps around these rollers, and tension is achieved through friction on the roller surfaces. The tension for flattening the fabric is determined by the friction of the tension rollers. Because the material and installation position of the tension rollers are fixed, the friction and tension in current devices are mostly fixed values. However, during the weaving process, it's difficult to avoid problems with ineffective fabric flattening due to changes in yarn batches or materials. Since the tension tension in most current devices is not adjustable, the flattening effect is affected, consequently impacting product quality. Furthermore, due to localized wear from long-term machine operation, the fabric may also exhibit lateral deviation during tensioning. Severe lateral deviation can easily lead to the fabric being scratched or torn by the machine. If the fabric deviation cannot be dynamically detected and limited in time, it will also affect continuous production. Therefore, it is necessary to provide a fabric pulling device with adjustable functions to dynamically adjust the fabric tension and limit lateral fabric deviation, thereby improving product quality and production stability. In view of this, this invention arises. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model discloses a fabric pulling device with an adjustable function. The pulling device includes a first pulling roller, a second pulling roller, a third pulling roller, a fourth pulling roller, a drive assembly, a first vision detection unit, a second vision detection unit, a negative pressure unit, and an electrical control system. The second, first, third, and fourth pulling rollers are arranged sequentially from top to bottom and are driven to rotate synchronously by the drive assembly. The fabric to be pulled passes around the second, first, third, and fourth pulling rollers in sequence. The vision sensors of the first and second vision detection units are respectively placed on the front or back of the fabric after it has passed over the fourth pulling roller and on the front of the left or right edge of the fabric wrapped on the first pulling roller. The negative pressure unit can provide negative pressure airflow of the same pressure to the two independent cavities inside the first pulling roller, or provide negative pressure airflow of different pressures, or provide negative pressure airflow to only one cavity. This invention utilizes video sensors in the first and second vision detection units to dynamically collect actual flattening and offset information during stretching. The electronic control system analyzes and compares this information with pre-set baseline information, and instructs the negative pressure unit to provide negative pressure airflow of the same or different pressures to the two independent cavities inside the first stretching roller, or to provide negative pressure airflow to only one cavity. This increases the positive pressure on both halves of the fabric wrapped around the first stretching roller simultaneously or unilaterally, altering the fabric's friction and adhesion. This dynamically adjusts the fabric's stretching tension or limits its lateral offset, improving the stretching and flattening effect or preventing lateral deviation, thereby enhancing product quality and production stability.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A fabric pulling device with adjustable function includes a first vision detection unit and a second vision detection unit. Each of the first and second vision detection units is equipped with a vision sensor. The first vision detection unit can collect information on the flattened state of the fabric after it has been pulled, and the second vision detection unit can collect information on the offset state of the fabric during pulling, using its vision sensor. The device is characterized by further including a first pulling roller, a second pulling roller, a third pulling roller, a fourth pulling roller, a drive assembly, and a negative pressure unit. The first, second, third, and fourth pulling rollers are each equipped with an elongated cylindrical roller body. The cylindrical roller body of the first pulling roller... The interior is a hollow cavity, divided into two independent left and right compartments. Several pinholes are distributed on the cavity wall of the cylindrical roller to allow air circulation. The axial center lines of the second, first, third, and fourth pull rollers are arranged sequentially from top to bottom and are parallel to each other. The axial center lines of the second and third pull rollers are on the same side of the axial center line of the first pull roller, and both the second and third pull rollers are adjacent to the first pull roller. The fabric to be pulled passes sequentially over the outer surfaces of the second, first, third, and fourth pull rollers. The pull rollers are equipped with interconnected transmission components, which can be driven to rotate by a drive assembly. The first, second, third, and fourth pull rollers can rotate synchronously, allowing the fabric to be wound around the second pull roller and out of the fourth pull roller for pulling. The vision sensor of the first vision detection unit is placed on the front or back of the fabric after it has been wound around the fourth pull roller, and it can dynamically detect the flattened state of the fabric after being pulled. The vision sensor of the second vision detection unit is placed on the front of the fabric wrapped around the first pull roller, and the vision sensor faces the left or right edge of the fabric, and it can dynamically detect the lateral displacement information of the fabric during movement. The negative pressure unit... The unit is equipped with an air pump that can provide negative pressure airflow to the left and right cavities of the first traction roller. The negative pressure unit is connected to the left and right cavities of the first traction roller respectively. The negative pressure unit can provide negative pressure airflow of the same pressure to the two cavities of the first traction roller respectively, so as to increase the friction and adsorption of the fabric wrapped around the outer surface of the first traction roller and improve the flattening effect of the fabric. The negative pressure unit can also provide negative pressure airflow of different pressures to the two cavities of the first traction roller respectively, or provide negative pressure airflow to only one cavity, so that the friction and adsorption of one side of the fabric wrapped around the outer surface of the first traction roller is greater than that of the other side, thereby limiting the fabric from sliding to the other side and preventing the fabric from continuing to deviate laterally.

[0006] Preferably, the wrapping angle α of the fabric wound on the outer surface of the first traction roller is not less than 210°.

[0007] Preferably, the fourth traction roller is positioned directly below and adjacent to the third traction roller.

[0008] The first traction roller includes a main roller, a left shaft head, a right shaft head, and a rotary air connector. The left shaft head and the right shaft head are respectively connected to the left and right ends of the main roller, and the axial center lines of the left shaft head, the main roller, and the right shaft head are concentric. There are two rotary air connectors, which are respectively connected to the ends of the left shaft head and the right shaft head.

[0009] The main roller includes a roller, a sealing plate, and a middle partition plate. The roller is a long hollow cylinder with a number of pinholes that are densely distributed on its cylindrical wall and are ventilation holes with a diameter of less than 2 mm. There are two sealing plates, which are placed at the left and right ends of the roller and fixed to the roller to form a closed cavity. The middle partition plate is fixed in the middle of the closed cavity of the main roller and evenly divides the closed cavity into two independent cavities on the left and right.

[0010] Preferably, the outer surface of the main roller is covered with a wear-resistant rubber layer, and its vent holes are not blocked by the rubber layer.

[0011] Both the left and right shaft heads are stepped round shafts, and each shaft head has a through hole along its axial center line. The left and right shaft heads are respectively fixed to the sealing plates at the left and right ends of the main roller. The sealing plates at the left and right ends are respectively provided with through holes, and each through hole communicates with the through holes of the left and right shaft heads. The rotating ends of the two rotary air connectors are respectively connected to the ends of the left and right shaft heads, and the two rotary air connectors are respectively connected to the through holes of the corresponding left and right shaft heads.

[0012] The second, third, and fourth traction rollers each include an auxiliary roller and a mandrel. The auxiliary roller is a long hollow circular roller with end plates at both ends. The diameter and length of the auxiliary roller are the same as those of the main roller. The mandrel is a long stepped circular shaft that passes through the end plates at both ends of the auxiliary roller and is fixedly connected to the end plates. Both ends of the mandrel are exposed, and the axial center line of the mandrel is concentric with that of the auxiliary roller.

[0013] Preferably, the outer surface of the auxiliary roller is covered with a wear-resistant rubber layer.

[0014] The first, second, third, and fourth traction rollers each include a transmission gear. The transmission gear of the first traction roller is detachably connected to the left shaft head. The transmission gears of the second, third, and fourth traction rollers are detachably connected to the left end of their respective mandrels. The transmission gears on the second, first, third, and fourth traction rollers mesh sequentially with each other. The drive assembly includes a drive gear and a motor. The drive gear is detachably connected to the output shaft of the motor. The drive gear is located on one side of the transmission gear of the first traction roller and meshes with the transmission gear.

[0015] The adjustable fabric pulling device further includes a support frame, which consists of two sets of symmetrically arranged support frames. Each set of support frames includes a support plate and four bearing seats. The four bearing seats of each set of support frames correspond one-to-one with the first pulling roller, the second pulling roller, the third pulling roller, and the fourth pulling roller. The left and right shaft ends of the first pulling roller and the spindles of the second, third, and fourth pulling rollers are respectively connected to the corresponding bearing seats on the two sets of support frames.

[0016] The fixed end of the rotary air connector is connected to the support frame by a bracket.

[0017] The motor is connected to the support frame by a bracket.

[0018] The vision sensor of the first vision detection unit is placed in the middle of the front or back of the wound fabric and adjacent to the fourth traction roller. The vision sensor is connected to the support frame by a bracket and the installation position of the vision sensor is adjustable.

[0019] The vision sensor of the second vision detection unit is placed on the front side of the fabric wrapped around the first traction roller and adjacent to the first traction roller. The center of the vision sensor is aligned with the initial edge of the left or right side of the fabric. The vision sensor is connected to the support frame by a bracket and the installation position of the vision sensor is adjustable.

[0020] The negative pressure unit includes a negative pressure pump, a pressure regulating valve, and a pressure sensor. There are two pressure regulating valves and two pressure sensors. The suction end of the negative pressure pump is connected to two air pipes, and the two air pipes are respectively connected to the rotating air connectors at both ends of the first traction roller. A pressure regulating valve and a pressure sensor are respectively installed on the two air pipes.

[0021] The pressure regulating valve is an electric pressure regulating valve with adjustable air pressure, and its electric actuator can be servo controlled. The pressure sensor is a gas pressure sensor.

[0022] The fabric pulling device with adjustment function also includes an electronic control system. The electronic control system includes an automatic control module and a servo controller. The motor, the first vision detection unit, the second vision detection unit, the negative pressure pump, the air pressure regulating valve, and the air pressure sensor are all electrically connected to the electronic control system. The electronic control system can preset the reference information of the qualified flattening state and the extreme deviation state of the fabric during pulling. It can dynamically receive and analyze the information collected by the first vision detection unit, the second vision detection unit, and the air pressure sensor, and control the operation of the motor, the negative pressure pump, and the air pressure regulating valve.

[0023] As can be seen from the above description, the advantages of the fabric pulling device with adjustment function provided by this utility model are as follows: by setting a first pulling roller, a second pulling roller, a third pulling roller, a fourth pulling roller, a drive assembly, a first vision detection unit, a second vision detection unit, a negative pressure unit and an electrical control system, and by pre-setting the reference information of the qualified flattening state and the limit offset state of the fabric during pulling in the electrical control system. The second, first, third, and fourth traction rollers are arranged sequentially from top to bottom and driven to rotate synchronously by a drive assembly. The fabric to be pulled passes around the second, first, third, and fourth traction rollers in sequence. The vision sensors of the first and second vision detection units are respectively placed on the front or back of the fabric after it has passed over the fourth traction roller and on the front of the left or right edge of the fabric wrapped around the first traction roller. The negative pressure unit can provide negative pressure airflow of the same pressure to the two independent cavities set inside the first traction roller, or provide negative pressure airflow of different pressures, or provide negative pressure airflow to only one cavity. The system utilizes video sensors from both the first and second vision detection units to dynamically acquire actual flattening and offset information during the stretching process. The electronic control system analyzes and compares this actual information with pre-set baseline information, and then instructs the negative pressure unit to provide negative pressure airflow of equal or different pressures to the two independent cavities inside the first stretching roller, or to provide negative pressure airflow to only one cavity. This increases the positive pressure on both halves of the fabric wrapped around the first stretching roller simultaneously or unilaterally, altering the fabric's friction and adhesion. This dynamically adjusts the fabric's stretching tension or limits lateral offset, improving the stretching effect or preventing lateral deviation, thereby enhancing product quality and production stability. This invention is rationally designed, simple in structure, low in cost, and easy to promote. Attached Figure Description

[0024] Figure 1 This is a simplified schematic diagram of a fabric pulling device with an adjustable function according to the present invention;

[0025] Figure 2 This is a general schematic diagram of a fabric pulling device with an adjustable function according to the present invention;

[0026] Figure 3 for Figure 2 Enlarged diagram of direction A in the diagram;

[0027] Figure 4 This is a schematic diagram of the first tension roller;

[0028] Figure 5 for Figure 4 Enlarged schematic diagram of part B in the diagram;

[0029] Figure 6This is a schematic diagram of the second, third, and fourth traction rollers;

[0030] Figure 7 This is an enlarged schematic diagram of the driving component;

[0031] Figure 8 This is an enlarged schematic diagram of the support frame;

[0032] Figure 9 This is a schematic diagram of the negative pressure unit.

[0033] Figure 10 This is a schematic diagram of the wrapping angle of the fabric wrapped around the first traction roller.

[0034] Figure label:

[0035] 1 First traction roller; 11 Main roller; 111 Roller; 1111 Vent hole; 112 Sealing plate; 113 Middle partition plate; 12 Left shaft head; 13 Right shaft head; 14 Rotary air connector; 15 Transmission gear; 2 Second traction roller; 21 Auxiliary roller; 22 Mandrel; 3 Third traction roller; 4 Fourth traction roller; 5 Drive assembly; 51 Drive gear; 52 Motor; 6 First vision inspection unit; 7 Second vision inspection unit; 8 Support frame; 81 Support plate; 82 Bearing seat; 9 Negative pressure unit; 91 Negative pressure pump; 92 Air pressure regulating valve; 93 Air pressure sensor; 900 Fabric. Detailed Implementation

[0036] The present invention will be further described below through specific embodiments.

[0037] like Figure 1 , Figure 2 , Figure 3 and Figure 10As shown, the fabric pulling device with adjustable function of this utility model includes a first pulling roller 1, a second pulling roller 2, a third pulling roller 3, a fourth pulling roller 4, a drive assembly 5, a first vision detection unit 6, a second vision detection unit 7, a support frame 8, a negative pressure unit 9, and an electrical control system. The first vision detection unit 6 and the second vision detection unit 7 are respectively equipped with vision sensors. The first vision detection unit 6 and the second vision detection unit 7 are known technologies. The first vision detection unit 6 can collect information on the flattened state of the fabric 900 after being pulled through its vision sensor, and the second vision detection unit 7 can collect information on the offset state of the fabric 900 during pulling through its vision sensor. The first pulling roller 1 and the second pulling roller... 2. The third traction roller 3 and the fourth traction roller 4 are each provided with an elongated cylindrical roller body. The interior of the cylindrical roller body of the first traction roller 1 is a cavity, which is divided into two independent left and right partitions. Several pinholes for air circulation are distributed on the cavity wall of the cylindrical roller body. The axial center lines of the second traction roller 2, the first traction roller 1, the third traction roller 3, and the fourth traction roller 4 are arranged sequentially from top to bottom and are parallel to each other. The axial center lines of the second traction roller 2 and the third traction roller 3 are located on the same side of the axial center line of the first traction roller 1, and both the second traction roller 2 and the third traction roller 3 are adjacent to the first traction roller 1. The fourth traction roller 4 can be placed directly below the third traction roller 3 and adjacent to the third traction roller 3, to be pulled. The fabric 900 sequentially wraps around the outer surfaces of the second pull roller 2, the first pull roller 1, the third pull roller 3, and the fourth pull roller 4. The wrapping angle α corresponding to the fabric 900 wrapped around the outer surface of the first pull roller 1 is generally not less than 210°. The first pull roller 1, the second pull roller 2, the third pull roller 3, and the fourth pull roller 4 are equipped with interconnected transmission components, and the transmission components can be driven to rotate by the drive assembly 5. The first pull roller 1, the second pull roller 2, the third pull roller 3, and the fourth pull roller 4 can rotate synchronously, allowing the fabric 900 to be wound into the second pull roller 2 and out of the fourth pull roller 4 for pulling. The vision sensor of the first vision detection unit 6 is placed on the front or back of the fabric 900 after it has been wound out of the fourth pull roller 4. The second visual detection unit 7 has a visual sensor that is placed on the front of the fabric 900 wrapped around the first pulling roller 1 and faces the left or right edge of the fabric 900. It can dynamically detect the lateral offset information of the fabric 900 when it moves. The negative pressure unit 9 is equipped with an air pump that can provide negative pressure airflow to the left and right cavities of the first pulling roller 1. The negative pressure unit 9 is connected to the left and right cavities of the first pulling roller 1 respectively. The negative pressure unit 9 can provide negative pressure airflow of the same pressure to the two cavities of the first pulling roller 1 respectively, so as to increase the friction and adsorption of the fabric 900 wrapped around the outer surface of the first pulling roller 1 to improve the flattening effect of the fabric 900.The negative pressure unit 9 can also provide negative pressure airflow of different pressures to the two cavities of the first traction roller 1, or provide negative pressure airflow to only one cavity, so that the friction and adsorption forces on one side of the fabric 900 wrapped around the outer surface of the first traction roller 1 are greater than those on the other side, thereby limiting the slippage of the fabric 900 to the other side and preventing the fabric 900 from continuing to deviate laterally.

[0038] like Figures 1 to 5 As shown, the first traction roller 1 of this utility model includes a main roller 11, a left shaft head 12, a right shaft head 13, a rotary air connector 14, and a transmission gear 15. The left shaft head 12 and the right shaft head 13 are respectively connected to the left and right ends of the main roller 11, and the axial center lines of the left shaft head 12, the main roller 11, and the right shaft head 13 are concentric. There are two rotary air connectors 14, which are respectively connected to the ends of the left shaft head 12 and the right shaft head 13. The main roller 11 includes a roller 111, a sealing plate 112, and a middle partition plate 113. The roller 111 is an elongated hollow cylinder with a number of pinholes densely distributed on its circumferential wall, each pinhole being a ventilation hole 1111 with a diameter less than 2 mm. Two sealing plates 112 are provided, positioned at the left and right ends of the roller 111 and fixedly connected to the roller 111 to form a closed cavity. The middle partition plate 113 is fixed in the middle of the closed cavity of the main roller 11, evenly dividing the closed cavity into two independent left and right cavities. The outer surface of the main roller 11 can be covered with a wear-resistant rubber layer, preventing the ventilation holes 1111 from being blocked by the rubber layer. Both the left shaft head 12 and the right shaft head 13 are stepped round shafts. Both the left shaft head 12 and the right shaft head 13 have through holes along their axial center lines. The left shaft head 12 and the right shaft head 13 are respectively fixed to the sealing plates 112 at the left and right ends of the main roller 11. The sealing plates 112 at the left and right ends are respectively provided with through holes, and their respective through holes are connected to the through holes of the left shaft head 12 and the right shaft head 13. The rotating ends of the two rotary air connectors 14 are respectively connected to the ends of the left shaft head 12 and the right shaft head 13. The two rotary air connectors 14 are respectively connected to the through holes of the corresponding left shaft head 12 and the right shaft head 13.

[0039] like Figures 1 to 6 As shown, the second pull roller 2, the third pull roller 3, and the fourth pull roller 4 of this utility model all include an auxiliary roller 21, a spindle 22, and a transmission gear 15. The auxiliary roller 21 is an elongated hollow circular roller with end plates at both ends. The diameter and length of the auxiliary roller 21 are the same as the diameter and length of the main roller 11. The spindle 22 is an elongated stepped circular shaft. The spindle 22 passes through the end plates at both ends of the auxiliary roller 21 and is fixedly connected to the end plates. Both ends of the spindle 22 are exposed. The axial center line of the spindle 22 is concentric with that of the auxiliary roller 21. The outer surface of the auxiliary roller 21 can be covered with a wear-resistant rubber layer.

[0040] like Figures 1 to 7As shown, the transmission gear 15 of the first traction roller 1 is detachably connected to the left shaft head 12. The transmission gears 15 of the second traction roller 2, the third traction roller 3, and the fourth traction roller 4 are detachably connected to the left end of their respective mandrels 22. The transmission gears 15 on the second traction roller 2, the first traction roller 1, the third traction roller 3, and the fourth traction roller 4 mesh sequentially. The drive assembly 5 includes a drive gear 51 and a motor 52. The drive gear 51 is detachably connected to the output shaft of the motor 52. The drive gear 51 is located on one side of the transmission gear 15 of the first traction roller 1 and meshes with the transmission gear 15.

[0041] like Figures 2 to 8 As shown, the support frame 8 of this utility model consists of two sets, which are symmetrically arranged. Each set of support frames 8 includes a support plate 81 and four bearing seats 82. The four bearing seats 82 of each set of support frames 8 correspond one-to-one with the first traction roller 1, the second traction roller 2, the third traction roller 3, and the fourth traction roller 4. The left shaft head 12 and the right shaft head 13 of the first traction roller 1, as well as the spindles 22 of the second traction roller 2, the third traction roller 3, and the fourth traction roller 4, are respectively connected to the corresponding bearing seats 82 on the two sets of support frames 8. The fixed end of the rotary air connector 14 is connected to the support frame 8 by a bracket; the motor 52 is connected to the support frame 8 by a bracket; the vision sensor of the first vision detection unit 6 is placed in the middle of the front or back of the wrapped fabric 900 and adjacent to the fourth pull roller 4, and its vision sensor is connected to the support frame 8 by a bracket and the installation position of the vision sensor is adjustable; the vision sensor of the second vision detection unit 7 is placed on the front of the fabric 900 wrapped around the first pull roller 1 and adjacent to the first pull roller 1, and the center of its vision sensor is aligned with the initial edge of the left or right side of the fabric 900, and the vision sensor is connected to the support frame 8 by a bracket and the installation position of the vision sensor is adjustable.

[0042] like Figure 1 , Figure 2 , Figure 4 and Figure 9 As shown, the negative pressure unit 9 of this utility model includes a negative pressure pump 91, a pressure regulating valve 92, and a pressure sensor 93. There are two pressure regulating valves 92 and two pressure sensors 93. The suction end of the negative pressure pump 91 is connected to two air pipes, which are respectively connected to the rotary air connectors 14 at both ends of the first traction roller 1. A pressure regulating valve 92 and a pressure sensor 93 are respectively installed on each of the two air pipes. The pressure regulating valve 92 is an adjustable electric pressure regulating valve, and its electric actuator is servo-controlled. The pressure sensor 93 is a gas pressure sensor. Both the pressure regulating valve 92 and the pressure sensor 93 are known technologies.

[0043] like Figures 1 to 9As shown, the electrical control system of this utility model includes an automatic control module and a servo controller. The electrical control system is a known technology and can be embedded as a subsystem in the overall control system of a warp knitting machine. The electrical control system is not shown in the figure. The motor 52, the first visual detection unit 6, the second visual detection unit 7, the negative pressure pump 91, the air pressure regulating valve 92, and the air pressure sensor 93 are all electrically connected to the electrical control system. The electrical control system can pre-set the reference information for the qualified flattening state and the extreme deviation state of the fabric 900 when stretched. It can dynamically receive and analyze the information collected by the first visual detection unit 6, the second visual detection unit 7, and the air pressure sensor 93, and can control the operation of the motor 52, the negative pressure pump 91, and the air pressure regulating valve 92.

[0044] The method of using the adjustable fabric pulling device is as follows:

[0045] The electronic control system pre-sets reference information for the qualified flattened state of fabric 900, which is used to compare with the actual flattened state information collected by the first vision detection unit 6. The reference information for the flattened state includes, but is not limited to, flatness, yarn looseness, and texture uniformity. The electronic control system also pre-sets reference information for the extreme offset state of fabric 900, which is used to compare with the actual offset state information collected by the second vision detection unit 7. The offset state reference information includes the threshold for allowable lateral offset when fabric 900 moves and the offset direction identification information. Then, the fabric 900 to be pulled is sequentially passed around the outer surfaces of the second pulling roller 2, the first pulling roller 1, the third pulling roller 3, and the fourth pulling roller 4, and the fabric 900 is... The front end of 0 is connected to an external fabric rolling machine; the installation position of the vision sensor of the second vision detection unit 7 is adjusted so that the center of the vision sensor is aligned with the initial edge of the left or right side of the fabric 900; the drive assembly 5 is started to drive the first pull roller 1, the second pull roller 2, the third pull roller 3 and the fourth pull roller 4 to rotate synchronously to pull and flatten the fabric 900, and the external fabric rolling machine synchronously rewinds the fabric 900 so that the pulled fabric 900 is in a non-slack state; during the pulling process, the vision sensors of the first vision detection unit 6 and the second vision detection unit 7 respectively collect the flattened state information and the offset state information of the fabric 900 after pulling, and feed them back to the electronic control system for analysis and processing.

[0046] Example 1:

[0047] If the actual flattened state of the fabric 900 after being pulled does not meet the set qualified flattened state, but the actual offset state of the fabric 900 during pulling does not exceed the set limit offset state, the electronic control system instructs the negative pressure unit 9 to provide negative pressure airflow of the same pressure to the two cavities of the first pulling roller 1, so as to increase the friction and adsorption force of the fabric 900 wrapped on the outer surface of the first pulling roller 1, thereby increasing the tension of the fabric 900 to improve the flattening effect of the fabric 900. Until the first visual detection unit 6 detects that the flattened state of the fabric 900 after being pulled meets the set qualified flattened state, the electronic control system instructs the negative pressure unit 9 to maintain pressure.

[0048] Example 2:

[0049] If the actual flattened state of the fabric 900 after being pulled meets the set qualified flattened state, but the actual deviation of the fabric 900 during pulling exceeds the set limit deviation state and it can be determined that it is deviating in a certain direction, the electronic control system instructs the negative pressure unit 9 to provide negative pressure airflow to a cavity on the non-deviation side of the first pulling roller 1 so that the friction and adsorption force of the fabric 900 wrapped on the outer surface of the first pulling roller 1 on this side is greater than the friction and adsorption force on the other side, thereby limiting the fabric 900 from sliding to the other side to prevent the fabric 900 from continuing to deviate laterally. Until the second vision detection unit 7 detects that the actual deviation state of the moving fabric 900 does not exceed the set limit deviation state, the electronic control system instructs the negative pressure unit 9 to maintain pressure.

[0050] Example 3:

[0051] If the actual flattened state of the fabric 900 after being pulled does not meet the set qualified flattened state, and the actual deviation of the fabric 900 during pulling exceeds the set limit deviation state and can be determined to be deviating in a certain direction, the electronic control system instructs the negative pressure unit 9 to provide negative pressure airflow of different pressures to the two cavities of the first pulling roller 1, thereby increasing the friction and adsorption of the fabric 900 wrapped on the outer surface of the first pulling roller 1, and making the friction and adsorption on one side greater than that on the other side, thereby increasing the tension of the fabric 900 to improve the flattening effect of the fabric 900, while restricting the fabric 900 from sliding to one side to prevent the fabric 900 from continuing to deviate laterally, until the first vision detection unit 6 detects that the flattened state of the pulled fabric 900 meets the set qualified flattened state, and the second vision detection unit 7 detects that the actual deviation of the moving fabric 900 does not exceed the set limit deviation state, the electronic control system instructs the negative pressure unit 9 to maintain pressure.

[0052] This utility model includes a first pulling roller 1, a second pulling roller 2, a third pulling roller 3, a fourth pulling roller 4, a drive assembly 5, a first vision detection unit 6, a second vision detection unit 7, a negative pressure unit 9, and an electrical control system. The electrical control system is pre-set with reference information on the qualified flattening state and the limit offset state of the fabric when it is pulled at 900 degrees. The second traction roller 2, the first traction roller 1, the third traction roller 3, and the fourth traction roller 4 are arranged sequentially from top to bottom and driven synchronously by the drive assembly 5. The fabric 900 to be pulled passes around the second traction roller 2, the first traction roller 1, the third traction roller 3, and the fourth traction roller 4 in sequence. The vision sensors of the first vision detection unit 6 and the second vision detection unit 7 are respectively placed on the front or back of the fabric 900 after it has passed around the fourth traction roller 4 and on the front of the left or right edge of the fabric 900 wrapped on the first traction roller 1. The negative pressure unit 9 can provide negative pressure airflow of the same pressure to the two independent cavities set inside the first traction roller 1, or provide negative pressure airflow of different pressures, or provide negative pressure airflow to only one cavity. The video sensors of the first vision detection unit 6 and the second vision detection unit 7 dynamically collect the actual flattening state information and the actual offset state information during the pulling process. The electronic control system analyzes and compares the actual state information with the preset reference information, and instructs the negative pressure unit 9 to provide negative pressure airflow of the same or different pressure to the two independent cavities inside the first pulling roller 1, or to provide negative pressure airflow to only one cavity. This causes the positive pressure on the left and right halves of the fabric 900 wrapped around the first pulling roller 1 to increase simultaneously or unilaterally, thereby changing the friction and adsorption force of the fabric 900. This dynamically adjusts the pulling tension of the fabric 900 or limits the lateral offset of the fabric 900, thereby improving the pulling and flattening effect of the fabric 900 or preventing the fabric 900 from going lateral, thus improving product quality and production stability.

[0053] In the description of this utility model, the terms used, such as "left" and "right," are indicative of the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely for the convenience of simplifying the description and do not explicitly or implicitly indicate a specific orientation or positional relationship that must be present. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0054] In the description of this utility model, terms such as "first," "second," "third," and "fourth" are used to distinguish names. The use of "first," "second," "third," and "fourth" is merely for the convenience of simplifying the description and has no specific meaning of sequence unless specifically stated otherwise.

[0055] The above are three specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.

Claims

1. A fabric pulling device with adjustable function, comprising a first visual detection unit (6) and a second visual detection unit (7), wherein the first visual detection unit (6) and the second visual detection unit (7) are respectively provided with visual sensors, the first visual detection unit (6) can collect information on the flattened state of the fabric (900) after being pulled through its visual sensors, and the second visual detection unit (7) can collect information on the offset state of the fabric (900) during pulling through its visual sensors, characterized in that: It also includes a first traction roller (1), a second traction roller (2), a third traction roller (3), a fourth traction roller (4), a drive assembly (5), and a negative pressure unit (9). The first traction roller (1), the second traction roller (2), the third traction roller (3), and the fourth traction roller (4) are each provided with an elongated cylindrical roller body. The interior of the cylindrical roller body of the first traction roller (1) is a cavity, which is divided into two independent partitions on the left and right sides. Several pinholes that allow air to circulate with the outside are distributed on the cavity wall of the cylindrical roller body. The second traction roller (2), the first traction roller (3), the second traction roller (4), the third traction roller (5), the fourth traction roller (4), the third traction roller (5), the fourth traction roller (4), the third traction roller (5), the fourth traction roller (4), the fifth traction roller (5), the sixth traction roller (6), the seventh traction roller (7), the eighth traction roller (8), the ninth traction roller (9), the elliptical roller (1), the elliptical roller (2), the elliptical roller (3), the elliptical roller (4), the elliptical roller (5), the elliptical roller (6), the elliptical roller (7), the elliptical roller (8), the elliptical roller (9), the elliptical roller (1), the elliptical roller (2), the elliptical roller (3), the elliptical roller (4), the elliptical roller (9), the elliptical roller (1), the elliptical roller (2), the elliptical roller (3), the elliptical roller (4), the elliptical roller (5 ... Roller (1), third traction roller (3), and fourth traction roller (4) are arranged sequentially from top to bottom with their axial center lines parallel to each other. The axial center lines of the second traction roller (2) and the third traction roller (3) are located on the same side of the axial center line of the first traction roller (1), and the second traction roller (2) and the third traction roller (3) are adjacent to the first traction roller (1). The fabric (900) to be pulled passes around the outer surfaces of the second traction roller (2), the first traction roller (1), the third traction roller (3), and the fourth traction roller (4) in sequence. The first traction roller (1), the third traction roller (3), the fourth traction roller (4), the first traction roller (1), the third traction roller (3), and the fourth traction roller (4) are arranged sequentially from top to bottom with their axial center lines parallel to each other. The axial center lines of the second traction roller (2) and the third traction roller (3) are located on the same side of the axial center line of the first traction roller (1), and the fourth traction roller (4). The second pull roller (2), the third pull roller (3), and the fourth pull roller (4) are provided with interconnected transmission components, and the transmission components can be driven to rotate by the drive assembly (5). The first pull roller (1), the second pull roller (2), the third pull roller (3), and the fourth pull roller (4) can rotate synchronously and can pull the fabric (900) from the second pull roller (2) to the fourth pull roller (4). The vision sensor of the first vision detection unit (6) is placed on the front or back of the fabric (900) after it has been pulled out of the fourth pull roller (4). The second visual detection unit (7) can dynamically detect the flattened state of the fabric (900) after it is pulled. The visual sensor of the second visual detection unit (7) is placed on the front of the fabric (900) wrapped around the first pulling roller (1) and the visual sensor faces the left or right edge of the fabric (900). It can dynamically detect the lateral offset state information when the fabric (900) moves. The negative pressure unit (9) is equipped with an air pump that can provide negative pressure airflow to the left and right cavities of the first pulling roller (1). The negative pressure unit (9) is connected to the left and right cavities of the first pulling roller (1) respectively.

2. The fabric pulling device with adjustment function according to claim 1, characterized in that: The first traction roller (1) includes a main roller (11), a left shaft head (12), a right shaft head (13), and a rotary air connector (14). The left shaft head (12) and the right shaft head (13) are respectively connected to the left and right ends of the main roller (11), and the axial center lines of the left shaft head (12), the main roller (11), and the right shaft head (13) are concentric. There are two rotary air connectors (14), which are respectively connected to the ends of the left shaft head (12) and the right shaft head (13).

3. The fabric pulling device with adjustment function according to claim 2, characterized in that: The main roller (11) includes a roller (111), a sealing plate (112), and a middle partition plate (113). The roller (111) is a long hollow cylinder with several pinholes communicating with the outside on its cylindrical wall. The pinholes are ventilation holes (1111) with a diameter of less than 2 mm. The sealing plate (112) consists of two pieces, which are placed at the left and right ends of the roller (111) and fixed to the roller (111) to form a closed cavity. The middle partition plate (113) is fixed in the middle of the closed cavity of the main roller (11) and evenly divides the closed cavity into two independent cavities on the left and right.

4. The fabric pulling device with adjustment function according to claim 3, characterized in that: The left shaft head (12) and the right shaft head (13) are both provided with through holes along their axial center line. The left shaft head (12) and the right shaft head (13) are respectively fixed to the sealing plates (112) at the left and right ends of the main roller (11). The sealing plates (112) at the left and right ends are respectively provided with through holes and their respective through holes are connected to the through holes of the left shaft head (12) and the right shaft head (13). The two rotary air connectors (14) are respectively connected to the ends of the left shaft head (12) and the right shaft head (13).

5. The fabric pulling device with adjustment function according to claim 4, characterized in that: The second traction roller (2), the third traction roller (3) and the fourth traction roller (4) each include an auxiliary roller (21) and a spindle (22). The auxiliary roller (21) is a long hollow round roller with end plates at both ends. The diameter and length of the auxiliary roller (21) are the same as the diameter and length of the main roller (11). The spindle (22) is a long stepped round shaft. The spindle (22) passes through the end plates at both ends of the auxiliary roller (21) and is fixed to the end plates. Both ends of the spindle (22) are exposed. The axial center line of the spindle (22) and the auxiliary roller (21) are concentric.

6. The fabric pulling device with adjustment function according to claim 5, characterized in that: The first traction roller (1), the second traction roller (2), the third traction roller (3) and the fourth traction roller (4) all include a transmission gear (15). The transmission gear (15) of the first traction roller (1) is connected to the left shaft head (12). The transmission gears (15) of the second traction roller (2), the third traction roller (3) and the fourth traction roller (4) are respectively connected to the left end of their respective mandrels (22). The transmission gears (15) on the second traction roller (2), the first traction roller (1), the third traction roller (3) and the fourth traction roller (4) mesh sequentially. The drive assembly (5) includes a drive gear (51) and a motor (52). The drive gear (51) is connected to the output shaft of the motor (52). The drive gear (51) is placed on one side of the transmission gear (15) of the first traction roller (1) and meshes with the transmission gear (15).

7. The fabric pulling device with adjustment function according to claim 6, characterized in that: It also includes support frames (8), which are in two sets and are symmetrically arranged. Each set of support frames (8) includes a support plate (81) and four bearing seats (82). The four bearing seats (82) of each set of support frames (8) correspond one-to-one with the first traction roller (1), the second traction roller (2), the third traction roller (3), and the fourth traction roller (4). The left shaft head (12) and right shaft head (13) of the first traction roller (1) and the spindles (22) of the second traction roller (2), the third traction roller (3), and the fourth traction roller (4) are respectively connected to the corresponding bearing seats (82) on the two sets of support frames (8).

8. The fabric pulling device with adjustment function according to claim 7, characterized in that: The negative pressure unit (9) includes a negative pressure pump (91), a pressure regulating valve (92) and a pressure sensor (93). There are two pressure regulating valves (92) and two pressure sensors (93). The negative pressure pump (91) is connected to two air pipes, and the two air pipes are respectively connected to the rotary air connectors (14) at both ends of the first traction roller (1). A pressure regulating valve (92) and a pressure sensor (93) are respectively provided on the two air pipes.

9. A fabric pulling device with an adjustable function according to claim 8, characterized in that: It also includes an electronic control system. The motor (52), the first vision detection unit (6), the second vision detection unit (7), the negative pressure pump (91), the air pressure regulating valve (92), and the air pressure sensor (93) are all electrically connected to the electronic control system. The electronic control system can dynamically receive information collected by the first vision detection unit (6), the second vision detection unit (7), and the air pressure sensor (93), analyze and process it, and control the operation of the motor (52), the negative pressure pump (91), and the air pressure regulating valve (92).

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