Detection device and method for warp knitting machine for improving yarn fabric defect detection precision

Abstract

The invention relates to the field of thread fabric detection, in particular to a detection device and method for a warp knitting machine for improving the thread fabric defect detection precision, and the device comprises a workbench which is provided with a guide roller for guiding a thread fabric; the supporting plate is arranged on the workbench, two pressure applying structures are symmetrically arranged on the supporting plate, and abutting rollers installed on the pressure applying structures are matched with the supporting plate; the linear driving module is connected with two groups of scrapers arranged on the workbench, the linear driving module can drive the scrapers to reciprocate in the width direction of the line fabric, and first convex shafts are arranged at the ends of the scrapers; the side plate is connected with the linear driving module, and a lifting groove and a stepping groove are formed in the side plate; the triggering assembly is connected with the pressure applying structure, and the triggering assembly can enable the abutting roller to execute one-time lifting action when the scraping plate moves to the end of the thread fabric; and the camera is arranged at the upper part of the workbench and is used for carrying out image acquisition on defects on the thread fabric, so that the detection precision is improved.

Description

Technical Field

[0001] The invention relates to the field of wire fabric detection, and in particular to a detection device and method for a warp knitting machine for improving the detection accuracy of wire fabric defects. Background Art

[0002] Warp knitted fabrics are made of short fibers such as cotton and wool, and filaments, which are interwoven together to form a fabric. They have excellent softness and are suitable for making products that require a comfortable touch. They are widely used in work clothes and seat fabrics.

[0003] In order to improve the quality of warp knitted fabrics, it is necessary to detect defects on warp knitted fabrics during the production process to prevent defective products from entering the market and affecting customer satisfaction.

[0004] Most of the existing warp knitted fabric defect detection devices rely on visual inspection, and interference factors need to be eliminated before visual inspection. Among them, the interference factors mainly include: wrinkles generated during the traction of the warp knitted fabric and broken threads and large particles of dust attached to the warp knitted fabric. The former can be eliminated by directional pulling of the warp knitted fabric, and the latter can be removed using a scraper with greater adhesion. However, after the scraper removes the broken threads and large particles of dust on the warp knitted fabric, these broken threads and large particles of dust will adhere to the scraper, resulting in the scraper having a tendency to carry these broken threads and large particles of dust back to the warp knitted fabric when it moves next time, which affects the accuracy of the detection of warp knitted fabric defects to a certain extent. Summary of the invention

[0005] The object of the present invention is to provide a detection device and method for a warp knitting machine for improving the accuracy of detecting defects in thread fabrics, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a detection device for a warp knitting machine for improving the accuracy of detecting defects in wire fabrics, comprising: a workbench, on which a guide roller for guiding the wire fabric is arranged; a support plate, arranged on the workbench, on which two groups of pressure structures are symmetrically arranged, and abutment rollers installed on the pressure structures cooperate with the support plate to pull the wire fabric in the width direction thereof; a linear drive module, connected to the two groups of scrapers arranged on the workbench, and the linear drive module can drive the scrapers to reciprocate in the width direction of the wire fabric. , a first convex shaft is provided at the end of the scraper; a side plate is connected to the linear drive module, a lifting groove and a stepping groove are formed on the side plate, the first convex shaft cooperates with the lifting groove to enable the scraper to separate from the wire fabric when it moves toward the middle of the wire fabric, and the first convex shaft cooperates with the stepping groove to enable the scraper to step down; a trigger component is connected to the pressure structure, and the trigger component can make the abutment roller perform a lifting action when the scraper moves to the end of the wire fabric; a camera is arranged on the upper part of the workbench, and the camera is used to capture images of defects on the wire fabric.

[0007] As a further solution of the present invention: the pressure structure includes a hysteresis sleeve fixedly connected to the support plate, a telescopic rod is slidably installed in the hysteresis sleeve, and the telescopic rod is rotatably connected to the abutment roller; a limiting ring is also provided on the telescopic rod, and a first spring is sleeved on the telescopic rod, one end of the first spring is connected to the limiting ring, and the other end is connected to the inner wall of the hysteresis sleeve.

[0008] As a further solution of the present invention: two sets of connecting plates are connected to the linear drive module, connecting rods are installed on the connecting plates, the connecting rods are slidably fitted with a connecting sleeve arranged on the scraper, and a second spring arranged in the connecting sleeve connects the inner wall of the connecting sleeve and the connecting rod; one end of the connecting plate is connected to the trigger assembly.

[0009] As a further solution of the present invention: the lifting groove includes a first horizontal groove arranged on the side plate, a first extension groove is arranged at one end of the first horizontal groove, and a fourth horizontal groove is arranged on the upper part of the first horizontal groove, and the two ends of the fourth horizontal groove are connected to the first horizontal groove through a second extension groove and a second inclined groove; the second extension groove is rotatably installed with a first switching member for guiding the first cam shaft at one end away from the fourth horizontal groove.

[0010] As a further solution of the present invention: the stepping groove includes a step groove arranged on the side plate and connected to one end of the first extension groove away from the first horizontal groove, and when the first convex shaft rolls in the step groove, the second spring can release elastic potential energy step by step; the stepping groove also includes a third horizontal groove connected to one end of the step groove away from the first extension groove, one end of the third horizontal groove is connected to the first inclined groove, the first inclined groove is colinear with the second extension groove and is connected; a second switching member is rotatably installed on one end of the first inclined groove away from the third horizontal groove.

[0011] As a further solution of the present invention: the stepped groove includes a first vertical groove connected to one end of the first extension groove away from the first horizontal groove, the end of the first vertical groove is connected to the second horizontal groove, the end of the second horizontal groove is connected to the second vertical groove, and the second vertical groove is connected to the third horizontal groove.

[0012] As a further solution of the present invention: the trigger assembly includes a second convex shaft rotatably connected to the connecting plate and a connecting plate connected to the telescopic rod, a connecting shaft is fixedly mounted on the connecting plate, and a trigger plate is rotatably mounted on the connecting shaft; the trigger plate and the connecting shaft are connected by an abutment structure, and the abutment structure can be locked after the trigger plate is swung to one side to a predetermined angle.

[0013] As a further solution of the present invention: the abutment structure includes a first limiting portion arranged on the connecting shaft, and the first limiting portion is adapted to a second limiting portion arranged on the rotating shaft of the trigger plate.

[0014] A method for detecting fabric defects using the warp knitting machine detection device for improving fabric defect detection accuracy comprises the following steps: Step 1: The traction line fabric passes through the guide roller and is wound on the winding device; Step 2: Start the winding device to pull the wire fabric, and at this time, the wire fabric can be tightened along its width direction with the cooperation of the abutment roller and the support plate; Step 3: The winding device stops working, and then the linear drive module moves, driving the two sets of scrapers to move from the middle of the fabric to both sides to scrape off the broken wires and large dust particles adhering to the fabric; Step 4: When the scraper moves to the end of the defect of the wire fabric, the component is triggered to move, so that the abutting roller performs a lifting action and keeps pulling the wire fabric; Step 5: The first convex shaft cooperates with the stepping groove to make the scraper vibrate in the vertical direction, so as to shake off the broken wires and large dust particles adhering to the scraper. Then, the first convex shaft cooperates with the lifting groove to separate the scraper from the wire fabric when it moves toward the middle position of the wire fabric, and adheres to the wire fabric when it reaches the middle position of the wire fabric. Step 6: The camera collects the defect information on the thread fabric and completes the detection of the defects on the thread fabric.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting the first cam and the lifting groove, in the process of the scraper following the movement of the linear drive module, when the scraper moves from the middle of the wire fabric toward the side, the scraper can maintain a close fit with the wire fabric, so that the scraper can remove the broken wires and large particles of dust on the wire fabric, thereby preventing the broken wires and large particles of dust from existing on the wire fabric and affecting the detection accuracy of its defects, reducing the probability of misjudgment, and when the scraper moves from the side of the wire fabric toward the middle, the scraper can maintain a separation from the wire fabric, thereby avoiding the broken wires and large particles of dust remaining on the scraper from returning to the wire fabric, further improving the detection accuracy; by setting the first cam and the stepping groove, multiple vibration shake-offs can be performed when the scraper moves toward the forming end. The scraper moves in reverse, and the loose threads that adhere to the scraper tightly can be removed by the pins. Similarly, the fluff is moved by the pins, which tends to separate the loose threads that are not shaken off from the scraper, thereby further reducing the residual amount of loose threads and loose dust on the scraper, and improving the cleaning effect of loose threads and loose dust when the scraper is in contact with the wire fabric next time, thereby further ensuring the detection accuracy. The pressure structure, abutment roller and support plate are arranged so that the wire fabric can be subjected to two vertical forces, so that the wire fabric is tightened, thereby effectively avoiding the formation of wrinkles, and preventing the detection accuracy from being affected by the presence of wrinkles during subsequent detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of an embodiment of a detection device for a warp knitting machine for improving the accuracy of detecting defects in a yarn fabric; Figure 2 A schematic structural diagram of another angle of an embodiment of a detection device for a warp knitting machine for improving the accuracy of detecting defects in a yarn fabric; Figure 3 A schematic structural diagram of a pressure structure in one embodiment of a detection device for a warp knitting machine for improving the accuracy of detecting defects in a yarn fabric; Figure 4 An exploded view of a pressure structure in one embodiment of a detection device for a warp knitting machine for improving the accuracy of detecting defects in a yarn fabric; Figure 5for Figure 4 A magnified view of the structure at center A; Figure 6 A schematic diagram of the structure of a linear drive module and a scraper in one embodiment of a detection device for a warp knitting machine for improving the accuracy of detecting defects in a wire fabric; Figure 7 A schematic structural diagram of the connection relationship between the connecting plate and the scraper in one embodiment of a detection device for a warp knitting machine for improving the accuracy of detecting defects in a yarn fabric; Figure 8 A schematic diagram of the planar structure of a side plate in an embodiment of a detection device for a warp knitting machine for improving the accuracy of detecting defects in thread fabrics.

[0017] In the figure: 1, workbench; 2, guide roller; 3, support plate; 4, hysteresis sleeve; 5, telescopic rod; 501, limit ring; 6, first spring; 7, abutment roller; 8, connecting plate; 9, connecting shaft; 901, first limit part; 10, trigger plate; 1001, second limit part; 11, dial pin; 12, side plate; 1201, first horizontal groove; 1202, first vertical groove; 1203, second horizontal groove; 1204, second vertical groove; 120 5. Third horizontal slot; 1206. First inclined slot; 1207. Fourth horizontal slot; 1208. Second inclined slot; 1209. First extension slot; 1210. Second extension slot; 13. Linear drive module; 14. Connecting plate; 15. Connecting rod; 16. Second spring; 17. Connecting sleeve; 18. Scraper; 19. First cam; 20. Second cam; 21. First switching member; 22. Second switching member; 23. Bracket; 24. Camera. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0020] See also Figure 1 to Figure 8In an embodiment of the present invention, a detection device for a warp knitting machine for improving the accuracy of detecting defects in a wire fabric includes: a workbench 1, a support plate 3, a linear drive module 13, a side plate 12, a trigger component and a camera 24.

[0021] The workbench 1 is provided with a guide roller 2 for guiding the wire fabric, and the workbench 1 is provided with a support plate located below the camera 24, which can support the wire fabric; the support plate 3 is provided on the workbench 1, and two groups of pressure structures are symmetrically provided on the support plate 3, and the abutment roller 7 installed on the pressure structure cooperates with the support plate 3 to pull the wire fabric along the width direction of the wire fabric; the pressure structure includes a hysteresis sleeve 4 fixedly connected to the support plate 3, and a telescopic rod 5 is slidably installed in the hysteresis sleeve 4, and the telescopic rod 5 is rotatably connected to the abutment roller 7; a limit ring 501 is also provided on the telescopic rod 5, and a first spring 6 is sleeved on the telescopic rod 5, one end of the first spring 6 is connected to the limit ring 501, and the other end is connected to the inner wall of the hysteresis sleeve 4.

[0022] When in use, the wire fabric is pulled out from the unwinding roller or the warp knitting machine, the wire fabric passes through the guide roller 2 and is placed on the support plate 3, at which time the abutment roller 7 is at the upper part of the wire fabric, wherein the abutment roller 7 is inclined relative to the side of the wire fabric. In detail, with the rotating shaft of the abutment roller 7 as a reference, the end of the rotating shaft away from the wire fabric is located at the rear of the direction in which the wire fabric is pulled and moved compared to the other end, and in the initial state, the first spring 6 is in a compressed state, so that the abutment roller 7 has a force acting on the wire fabric, and when the wire fabric is pulled and moved, it can generate relative sliding between the abutment roller 7 and the abutment roller 7. At this time, the abutment roller The contact position of 7 with the wire fabric can generate a force (friction force) along the width direction of the wire fabric and away from the middle part of the wire fabric, and under the trend of this force, the abutment roller 7 cooperates with the support plate 3, so that the wire fabric has a pulling force along its width direction, so that the wire fabric can be tightened along its width direction, and the wire fabric can also be subjected to a pulling force along its length direction when being pulled by the winding device (not shown in the figure). With the cooperation of these two forces, the wire fabric can be tightened, thereby effectively avoiding the generation of wrinkles and preventing the presence of wrinkles from affecting the detection accuracy during the subsequent detection process.

[0023] See also Figure 6~Figure 8The linear drive module 13 is connected to two groups of scrapers 18 arranged on the workbench 1, and the linear drive module 13 can drive the scrapers 18 to reciprocate along the width direction of the wire fabric. The end of the scraper 18 is provided with a first convex shaft 19, wherein the scraper 18 is provided with fluff for adhering broken wires and large particles of dust; the linear drive module 13 is connected to two groups of connecting plates 14, and a connecting rod 15 is installed on the connecting plate 14. The connecting rod 15 is slidably fitted with a connecting sleeve 17 arranged on the scraper 18, and a second spring 16 arranged in the connecting sleeve 17 connects the inner wall of the connecting sleeve 17 and the connecting rod 15, wherein the second spring 16 is always in a compressed state; the side plate 12 is connected to the linear drive module 13, and a Lifting groove and stepping groove, the first cam 19 cooperates with the lifting groove to enable the scraper 18 to separate from the wire fabric when it moves toward the middle of the wire fabric, and the first cam 19 cooperates with the stepping groove to enable the scraper 18 to step down, specifically: the lifting groove includes a first horizontal groove 1201 arranged on the side plate 12, one end of the first horizontal groove 1201 is provided with a first extension groove 1209, and the upper part of the first horizontal groove 1201 is provided with a fourth horizontal groove 1207, the two ends of the fourth horizontal groove 1207 are connected to the first horizontal groove 1201 through a second extension groove 1210 and a second inclined groove 1208; the second extension groove 1210 is rotatably installed at one end away from the fourth horizontal groove 1207 with a first switching member 21 for guiding the first cam 19.

[0024] In the initial state, the first cam 19 is in the stepping groove, and when the winding device drives the wire fabric to move a predetermined length by stepping, the winding device will stop. At this time, the linear drive module 13 can drive the scraper 18 to move through the connecting rod 15 and the connecting sleeve 17, and make the first cam 19 enter the second extension groove 1210 under the guidance of the first switching member 21, and move along the length direction of the second extension groove 1210, so that the height of the scraper 18 can be greater than the height of the wire fabric, that is, the two are in a separated state at this time, and then the first cam 19 will move along the fourth horizontal groove 1207 until the first cam 19 moves to the fourth horizontal groove After the end of 1207, the first protrusion 19 can move along the second inclined groove 1208 so that after the scraper 18 moves to the middle of the wire fabric, it can fit with the wire fabric. In this process, firstly, when the scraper 18 moves toward the middle of the wire fabric, it can be separated from the wire fabric, thereby preventing the broken wire and large particles of dust remaining on the scraper 18 from being carried back to the wire fabric; secondly, under the guidance of the second inclined groove 1208, the scraper 18 can move toward the wire fabric at a constant speed instead of instantaneous movement, and no vibration will be generated, thereby reducing the situation where large particles of dust remaining on the scraper 18 are shaken off onto the wire fabric due to vibration.

[0025] When the linear drive module 13 drives the scraper 18 to move from the middle of the wire fabric toward the side, the first cam 19 can move in the first horizontal groove 1201. At this time, the scraper 18 can fit the wire fabric, thereby scraping off the broken wires and large particles of dust adhering to the wire fabric, so as to prevent the broken wires and large particles of dust from existing on the wire fabric, affecting the detection accuracy of its defects and reducing the probability of misjudgment.

[0026] When the first protrusion 19 moves to the end of the first horizontal groove 1201, it can abut against the first switching member 21, driving the first switching member 21 to deflect. When the first protrusion 19 moves into the first extension groove 1209, the first switching member 21 can be separated from the first protrusion 19 and reset under the action of gravity, that is, the first switching member 21 has the effect of guiding the first protrusion 19 to move in a predetermined direction of movement.

[0027] Through the above-mentioned arrangement, in the process of the scraper 18 following the movement of the linear drive module 13, when the scraper 18 moves from the middle of the wire fabric toward the side, the scraper 18 can maintain a close fit with the wire fabric, so that the scraper 18 can remove the broken wires and large particles of dust on the wire fabric, prevent the broken wires and large particles of dust from existing on the wire fabric, and affect the detection accuracy of its defects, thereby reducing the probability of misjudgment; and when the scraper 18 moves from the side toward the middle of the wire fabric, the scraper 18 can maintain a separation from the wire fabric, thereby avoiding the broken wires and large particles of dust remaining on the scraper 18 from returning to the wire fabric, thereby further improving the detection accuracy.

[0028] See also Figure 8 The step groove includes a stepped groove provided on the side plate 12 and connected to the end of the first extension groove 1209 away from the first horizontal groove 1201, and when the first convex shaft 19 rolls in the stepped groove, the second spring 16 can release elastic potential energy step by step; the step groove also includes a third horizontal groove 1205 connected to the end of the stepped groove away from the first extension groove 1209, and one end of the third horizontal groove 1205 is connected to the first inclined groove 1206, and the first inclined groove 1206 is colinear with the second extension groove 1210 and is connected; the first inclined groove 1206 A second switching member 22 is rotatably installed at one end away from the third horizontal groove 1205; the stepped groove includes a first vertical groove 1202 connected to one end of the first extension groove 1209 away from the first horizontal groove 1201, the end of the first vertical groove 1202 is connected to the second horizontal groove 1203, the end of the second horizontal groove 1203 is connected to the second vertical groove 1204, and the second vertical groove 1204 is connected to the third horizontal groove 1205; wherein, needles 11 are provided on both sides of the workbench 1, and the needles 11 can remove broken wires adhering to and winding around the scraper 18.

[0029] When the scraper 18 completes scraping off the broken wires and large particles of dust on the wire fabric and separates from the wire fabric, the linear drive module 13 can continue to drive the scraper 18 to move. At this time, the first cam 19 can continue to move along the length direction of the first extension groove 1209. After the first cam 19 moves to the end of the first extension groove 1209, the second spring 16 can release the elastic potential energy, so that the first cam 19 accelerates along the first vertical groove 1202, and when the first cam 19 abuts against the second horizontal groove 1203, the scraper 18 stops moving immediately. During this process, the scraper 18 can vibrate, so that the large particles of dust and broken wires with poor adhesion adhering to the scraper 18 can be shaken off. Then the first cam 19 continues to move along the second horizontal groove 1203. After moving to the end of the second horizontal groove 1203, the second spring 16 can release the elastic potential energy, so that the first cam 19 accelerates along the first vertical groove 1202. When the first cam 19 abuts against the second horizontal groove 1203, the scraper 18 stops moving immediately. During this process, the scraper 18 can vibrate, thereby shaking off the large particles of dust and broken wires with poor adhesion adhering to the scraper 18. The second spring 16 releases the elastic potential energy again, so that the scraper 18 can perform a vibration action again to shake off the large particles of dust and broken wires with poor adhesion on the scraper 18 for a second time. Then, when the linear drive module 13 drives the scraper 18 to move in the opposite direction, the first cam 19 can move along the third horizontal groove 1205. During this process, the needle 11 can cross-cut into the fluff at the bottom of the scraper 18 to remove the broken wires that are more tightly adhered to the scraper 18. Similarly, the fluff is moved by the needle 11, which also has a tendency to separate the large particles of dust that are not shaken off by the vibration from the scraper 18, thereby further reducing the residual amount of broken wires and large particles of dust on the scraper 18, and improving the scraper 18. When it is in contact with the wire fabric next time, it can have a better cleaning effect on the broken wires and large particles of dust, thereby further ensuring the detection accuracy.

[0030] It should be noted that when the first protrusion 19 moves from the first horizontal groove 1201 toward the first extension groove 1209, it can do so under the guidance of the second switching member 22, and when the first protrusion 19 moves from the first inclined groove 1206 toward the second extension groove 1210, when the first protrusion 19 abuts against the second switching member 22, it can drive the second switching member 22 to deflect, and after the first protrusion 19 is separated from the second switching member 22, the second switching member 22 can automatically reset under the action of gravity.

[0031] Through the above-mentioned arrangement, when the scraper 18 moves toward the forming end, it can perform multiple vibration shaking-off actions to shake off large particles of dust and broken wires with poor adhesion adhering to the scraper 18, and when the scraper 18 moves in the opposite direction, the broken wires that are relatively tightly adhered to the scraper 18 can be removed under the action of the dialing needle 11. Similarly, the fluff is moved by the dialing needle 11, which also has a tendency to separate large particles of dust that are not shaken off by the vibration from the scraper 18, thereby further reducing the residual amount of broken wires and large particles of dust on the scraper 18, and improving the scraper 18. When it is in contact with the wire fabric next time, it can have a better cleaning effect on broken wires and large particles of dust, thereby further ensuring the detection accuracy.

[0032] For ease of understanding, the movement path of the first convex shaft 19 during the reciprocating motion of the scraper 18 can be referred to in the attached Figure 8 The path indicated by the arrow in the middle is a horizontal figure-8 path.

[0033] See also Figure 4~Figure 5 , the trigger assembly is connected to the connecting plate 14, and the trigger assembly can make the abutment roller 7 perform a lifting action when the scraper 18 moves to the end of the wire fabric; the trigger assembly includes a second convex shaft 20 rotatably connected to the connecting plate 14 and a connecting plate 8 connected to the telescopic rod 5, a connecting shaft 9 is fixedly installed on the connecting plate 8, and a trigger plate 10 is rotatably installed on the connecting shaft 9; the trigger plate 10 is connected to the connecting shaft 9 through an abutment structure, and the abutment structure can be locked after the trigger plate 10 is swung to one side to a predetermined angle, and the abutment structure includes a first limiting portion 901 arranged on the connecting shaft 9, and the first limiting portion 901 is adapted to the second limiting portion 1001 arranged on the rotating shaft of the trigger plate 10; the camera 24 is arranged on the upper part of the workbench 1, and the camera 24 is used to capture images of defects on the wire fabric. Specifically, the camera 24 is connected to the side plate 12 through a bracket 23.

[0034] When the scraper 18 moves from the middle of the wire fabric toward the side, it exerts a certain pressure on the wire fabric, and the support plate has a supporting force on the wire fabric, so that the wire fabric can be clamped between the scraper 18 and the support plate, and the force of the scraper 18 on the wire fabric can be increased, and the removal effect of broken wires and large particles of dust is improved. When the scraper 18 moves toward the side of the wire fabric, the scraper 18 has the effect of pulling the wire fabric along its width direction and causes a certain deformation of the wire fabric. After the scraper 18 moves to the side of the wire fabric, there are certain wrinkles in the wire fabric between the abutment roller 7 and the scraper 18. At this time, the second convex The shaft 20 can act on the trigger plate 10 and deflect the trigger plate 10. After the trigger plate 10 is deflected to a predetermined angle, the first limit portion 901 abuts against the second limit portion 1001, so that the trigger plate 10 cannot deflect again. At this time, the trigger plate 10 cooperates with the second convex shaft 20 to separate the abutment roller 7 from the wire fabric, thereby releasing the wrinkle of the wire fabric between the abutment roller 7 and the scraper 18. After the trigger plate 10 is separated from the second convex shaft 20, the abutment roller 7 abuts against the wire fabric again, so that the wire fabric in this state has a certain tensioning effect, and to a certain extent, the defects hidden inside the wire fabric can be exposed for easy detection.

[0035] When the second protruding shaft 20 moves in the opposite direction, it can still drive the trigger plate 10 to deflect, but the first limiting portion 901 will not abut against the second limiting portion 1001, so that the trigger plate 10 can deflect a larger angle, and after the second protruding shaft 20 is separated from the trigger plate 10, the trigger plate 10 can automatically reset under the action of gravity.

[0036] Through the above arrangement, after the scraper 18 moves to separate from the wire fabric, the abutment roller 7 can perform a lifting action. At this time, the wire fabric pulled by the scraper 18 can be stretched to a certain extent, so that the defects hidden inside the wire fabric can be exposed for easy detection, thereby improving the detection quality.

[0037] As an embodiment of the present invention, a method for detecting defects in a thread fabric using the detection device for a warp knitting machine for improving the detection accuracy of thread fabric defects is also proposed, comprising the following steps: Step 1: The traction line fabric passes through the guide roller 2 and is wound on the winding device; Step 2: Start the winding device to pull the wire fabric. At this time, the wire fabric can be tightened along its width direction with the cooperation of the abutting roller 7 and the supporting plate 3; Step 3: The winding device stops working, and then the linear drive module 13 is activated to drive the two sets of scrapers 18 to move from the middle position of the wire fabric to the two sides to scrape off the broken wires and large dust particles adhering to the wire fabric; Step 4: When the scraper 18 moves to the end of the defect of the wire fabric, the component is triggered to make the contact roller 7 perform a lifting action and keep pulling the wire fabric; Step 5: The first convex shaft 19 cooperates with the stepping groove to make the scraper 18 vibrate in the vertical direction, so as to shake off the broken wires and large dust particles adhering to the scraper 18. Then, the first convex shaft 19 cooperates with the lifting groove to separate the scraper 18 from the wire fabric when it moves toward the middle position of the wire fabric, and adheres to the wire fabric when it reaches the middle position of the wire fabric. Step 6: The camera 24 collects the defect information on the thread fabric and completes the detection of the defects on the thread fabric segment.

[0038] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A detection device for a warp knitting machine for improving the accuracy of detecting defects in a yarn fabric, characterized in that: include: A workbench, wherein the workbench is provided with a guide roller for guiding the wire fabric; a support plate is arranged on the workbench, and two groups of pressure structures are symmetrically arranged on the support plate, and the abutment roller installed on the pressure structure cooperates with the support plate to pull the wire fabric along the width direction of the wire fabric; a linear drive module is connected to the two groups of scrapers arranged on the workbench, and the linear drive module can drive the scrapers to reciprocate along the width direction of the wire fabric, and a first cam is arranged at the end of the scraper; a side plate is connected to the linear drive module, and a lifting groove and a stepping groove are formed on the side plate, and the first cam cooperates with the lifting groove to enable the scraper to separate from the wire fabric when it moves toward the middle of the wire fabric, and the first cam cooperates with the stepping groove to enable the scraper to step down; a trigger component is connected to the pressure structure, and the trigger component can cause the abutment roller to perform a lifting action when the scraper moves to the end of the wire fabric; A camera is arranged on the upper part of the workbench, and the camera is used to collect images of defects on the thread fabric.

2. A detection device for warp knitting machines for improving the detection accuracy of fabric defects according to claim 1, characterized in that: The pressure structure includes a hysteresis sleeve fixedly connected to the support plate, a telescopic rod is slidably installed in the hysteresis sleeve, and the telescopic rod is rotatably connected to the abutment roller; a limiting ring is also provided on the telescopic rod, and a first spring is sleeved on the telescopic rod, one end of the first spring is connected to the limiting ring, and the other end is connected to the inner wall of the hysteresis sleeve.

3. The detection device for warp knitting machine for improving the detection accuracy of thread fabric defects according to claim 2, characterized in that: The linear drive module is connected to two sets of connecting plates, and a connecting rod is installed on the connecting plate. The connecting rod is slidably fitted with a connecting sleeve arranged on the scraper, and a second spring arranged in the connecting sleeve connects the inner wall of the connecting sleeve and the connecting rod; one end of the connecting plate is connected to the trigger assembly.

4. The detection device for warp knitting machine for improving the detection accuracy of thread fabric defects according to claim 3, characterized in that: The lifting groove includes a first horizontal groove arranged on the side plate, a first extension groove is arranged at one end of the first horizontal groove, and a fourth horizontal groove is arranged on the upper part of the first horizontal groove, and the two ends of the fourth horizontal groove are connected to the first horizontal groove through a second extension groove and a second inclined groove; the second extension groove has an end away from the fourth horizontal groove and a first switching member for guiding the first cam shaft rotatably installed thereon.

5. The detection device for warp knitting machine for improving the detection accuracy of thread fabric defects according to claim 4, characterized in that: The stepping groove includes a step groove arranged on the side plate and connected to the end of the first extension groove away from the first horizontal groove, and when the first convex shaft rolls in the step groove, the second spring can release elastic potential energy step by step; the stepping groove also includes a third horizontal groove connected to the end of the step groove away from the first extension groove, one end of the third horizontal groove is connected to the first inclined groove, the first inclined groove is colinear with the second extension groove and is connected; the second switching member is rotatably installed on the end of the first inclined groove away from the third horizontal groove.

6. The detection device for warp knitting machine for improving the detection accuracy of thread fabric defects according to claim 5, characterized in that: The stepped groove includes a first vertical groove connected to one end of the first extension groove away from the first horizontal groove, the end of the first vertical groove is connected to the second horizontal groove, the end of the second horizontal groove is connected to the second vertical groove, and the second vertical groove is connected to the third horizontal groove.

7. The detection device for warp knitting machine for improving the detection accuracy of thread fabric defects according to claim 3, characterized in that: The trigger assembly includes a second convex shaft rotatably connected to the connecting plate and a connecting plate connected to the telescopic rod, a connecting shaft is fixedly mounted on the connecting plate, and a trigger plate is rotatably mounted on the connecting shaft; the trigger plate and the connecting shaft are connected by an abutment structure, and the abutment structure can be locked after the trigger plate is swung to one side to a predetermined angle.

8. The detection device for warp knitting machine for improving the detection accuracy of thread fabric defects according to claim 7, characterized in that: The abutment structure includes a first limiting portion provided on the connecting shaft, and the first limiting portion is adapted to a second limiting portion provided on the rotating shaft of the trigger plate.

9. A method for detecting defects in a yarn fabric using the detection device for a warp knitting machine for improving the detection accuracy of yarn fabric defects as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: The traction line fabric passes through the guide roller and is wound on the winding device; Step 2: Start the winding device to pull the wire fabric, and at this time, the wire fabric can be tightened along its width direction with the cooperation of the abutment roller and the support plate; Step 3: The winding device stops working, and then the linear drive module moves, driving the two sets of scrapers to move from the middle of the fabric to both sides to scrape off the broken wires and large dust particles adhering to the fabric; Step 4: When the scraper moves to the end of the defect of the wire fabric, the component is triggered to move, so that the abutting roller performs a lifting action and keeps pulling the wire fabric; Step 5: The first convex shaft cooperates with the stepping groove to make the scraper vibrate in the vertical direction, so as to shake off the broken wires and large dust particles adhering to the scraper. Then, the first convex shaft cooperates with the lifting groove to separate the scraper from the wire fabric when it moves toward the middle position of the wire fabric, and adheres to the wire fabric when it reaches the middle position of the wire fabric. Step 6: The camera collects the defect information on the thread fabric and completes the detection of the defects on the thread fabric.

Images