A detection device and method for warp knitting machines to improve the detection accuracy of defects in wire fabrics

Abstract

The present invention relates to the field of wire fabric detection, and specifically to a warp knitting machine detection device and method for improving the detection accuracy of wire fabric defects, including: a workbench, on which a guiding roller for guiding the wire fabric is arranged; a support plate, arranged on the workbench, and two groups of pressing structures are symmetrically arranged on the support plate, and the abutting rollers installed on the pressing structures are adapted to the support plate; a linear driving module, connected to two groups of scraping plates arranged on the workbench, and the linear driving module can drive the scraping plates to reciprocate along the width direction of the wire fabric, and a first convex shaft is arranged at the end of the scraping plate; a side plate, connected to the linear driving module, and a lifting groove and a stepping groove are formed on the side plate; a trigger assembly, connected to the pressing structure, and the trigger assembly can make the abutting roller perform a lifting action when the scraping plate moves to the end of the wire fabric; a camera, arranged above the workbench, and the camera is used for image acquisition of the defects on the wire fabric to improve the detection accuracy.

Description

Technical Field

[0001] The present invention relates to the field of wire fabric detection, and specifically to a detection device and method for a warp knitting machine that improves the detection accuracy of wire fabric defects. Background Art

[0002] Warp knitted fabrics are made of short fibers such as carded cotton and wool and filaments, which are interwoven 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 the defect points on the warp knitted fabrics during the production process to prevent defective products from flowing into the market and affecting customer satisfaction.

[0004] Most of the existing warp knitted fabric defect detection devices rely on visual detection. Before visual detection, interference factors need to be excluded. Among them, the interference factors mainly include: wrinkles generated during the traction of the warp knitted fabric and broken wires and large particle dust attached to the warp knitted fabric. For the former, it can be eliminated by orienting the traction of the warp knitted fabric. For the latter, a scraper with greater adhesiveness can be used to remove it. However, after the scraper removes the broken wires and large particle dust on the warp knitted fabric, these broken wires and large particle dust will adhere to the scraper, resulting in a tendency to re-carry this part of the broken wires and large particle dust onto the warp knitted fabric during the next movement of the scraper, which to a certain extent affects the detection accuracy of the warp knitted fabric defect points. Summary of the Invention

[0005] The purpose of the present invention is to provide a detection device and method for a warp knitting machine that improves the detection accuracy of wire fabric defects, so as to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A detection device for a warp knitting machine that improves the detection accuracy of wire fabric defects, comprising:

[0008] A workbench, on which a guiding roller for guiding the wire fabric is provided;

[0009] A support plate, arranged on the workbench, and two groups of pressing structures are symmetrically arranged on the support plate. A pressing roller installed on the pressing structure cooperates with the support plate to be able to pull the wire fabric along the width direction thereof;

[0010] A linear driving module, connected to two groups of scrapers arranged on the workbench, the linear driving module can drive the scrapers to reciprocate along the width direction of the wire fabric, and a first convex shaft is provided at the end of the scraper;

[0011] A side plate 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 moving toward the middle of the wire fabric, and the first convex shaft cooperates with the stepping groove to enable the scraper to step down;

[0012] A trigger assembly connected to the pressure structure, wherein the trigger assembly can cause the abutting roller to perform a lifting action when the scraper moves to the end of the wire fabric;

[0013] 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.

[0014] As a further solution of the present invention: the pressure structure comprises 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 abutting roller;

[0015] The telescopic rod is also provided with a limit ring, and the telescopic rod is sleeved with a first spring, one end of the first spring is connected to the limit ring, and the other end is connected to the inner wall of the hysteresis sleeve.

[0016] 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 connecting sleeves arranged on the scraper, and a second spring arranged in the connecting sleeves connects the inner wall of the connecting sleeves and the connecting rods;

[0017] One end of the connecting plate is connected to the trigger component.

[0018] As a further solution of the present invention: the lifting slot includes a first horizontal slot arranged on the side plate, a first extension slot is arranged at one end of the first horizontal slot, and a fourth horizontal slot is arranged on the upper part of the first horizontal slot, and both ends of the fourth horizontal slot are connected to the first horizontal slot through a second extension slot and a second inclined slot;

[0019] A first switching member for guiding the first convex shaft is rotatably mounted on one end of the second extension groove away from the fourth horizontal groove.

[0020] As a further solution of the present invention: the step groove comprises a stepped groove provided on the side plate and connected to an end of the first extension groove away from the first horizontal groove, and when the first convex shaft rolls in the stepped groove, the second spring can release elastic potential energy step by step;

[0021] The stepping groove further includes a third horizontal groove connected to the end of the stepped groove away from the first extension groove. One end of the third horizontal groove is connected to a first inclined groove, and the first inclined groove is collinear and communicated with the second extension groove;

[0022] A second switching member is rotatably installed at the end of the first inclined groove away from the third horizontal groove.

[0023] As a further solution of the present invention: the stepped groove includes a first vertical groove connected to the end of the first extension groove away from the first horizontal groove. The end of the first vertical groove is connected to a second horizontal groove, the end of the second horizontal groove is connected to a second vertical groove, and the second vertical groove is connected to the third horizontal groove.

[0024] 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 installed on the connecting plate, and a trigger plate is rotatably installed on the connecting shaft;

[0025] The trigger plate is connected to the connecting shaft through an abutting structure, and the abutting structure can be locked after the trigger plate swings to a predetermined angle toward one side.

[0026] As a further solution of the present invention: the abutting 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.

[0027] A method for detecting fabric defects of a warp knitting machine using the detecting device for improving the detection accuracy of fabric defects, comprising the following steps:

[0028] Step 1: Traction the fabric through the guide roller and wind it on the winding device;

[0029] Step 2: Start the winding device to pull the fabric. At this time, the fabric can be tightened along its width direction under the cooperation of the abutting roller and the support plate;

[0030] Step 3: The winding device stops working, and then the linear driving module acts to drive the two groups of scraping plates to move from the middle position of the fabric toward both sides to scrape off the broken wires and large particle dust adhering to the fabric;

[0031] Step 4: When the scraping plate moves to the end of the fabric defect, the trigger assembly acts to make the abutting roller perform a lifting action and maintain the pulling of the fabric;

[0032] Step 5: The first convex shaft cooperates with the stepping groove to cause the scraper to vibrate in the vertical direction, shaking off broken wires and large-particle dust adhering to the scraper. Subsequently, the first convex shaft cooperates with the lifting groove, so that when the scraper moves towards the middle position of the wire fabric, it separates from the wire fabric and fits with the wire fabric when reaching the middle position of the wire fabric;

[0033] Step 6: The camera collects the defect information on the wire fabric and completes the detection of the defects on this section of the wire fabric.

[0034] Compared with the prior art, the beneficial effects of the present invention are:

[0035] By providing the first convex shaft and the lifting groove, during the movement of the scraper following the linear drive module, when the scraper moves from the middle of the wire fabric towards the side, the scraper can keep in contact with the wire fabric, so that the scraper can remove broken wires and large-particle dust on the wire fabric, preventing broken wires and large-particle dust from existing on the wire fabric and affecting the detection accuracy of its defects and reducing the probability of misjudgment. When the scraper moves from the side of the wire fabric towards the middle, the scraper can keep separated from the wire fabric, thus avoiding the broken wires and large-particle dust remaining on the scraper from returning to the wire fabric again, further improving the detection accuracy;

[0036] By providing the first convex shaft and the stepping groove, when the scraper moves towards the forming end, multiple vibration shaking-off actions can be performed to shake off large-particle dust and poorly adherent broken wires adhering to the scraper. And when the scraper moves in the reverse direction, under the action of the dialing needle, the relatively tightly adhered broken wires on the scraper can be removed. Similarly, the fluff is dialed by the dialing needle, which also has the tendency to separate the large-particle dust that has not been shaken off by the vibration from the scraper, further reducing the residual amount of broken wires and large-particle dust on the scraper. When the scraper fits with the wire fabric next time, it can have a better cleaning effect on broken wires and large-particle dust, further ensuring the detection accuracy;

[0037] By providing the pressing structure, the abutting roller and the support plate, the wire fabric can be subjected to two perpendicular acting forces, so that the wire fabric is tightened, effectively avoiding the generation of wrinkles and preventing the influence of the existence of wrinkles on the detection accuracy during the subsequent detection process. Description of the Drawings

[0038] Figure 1 Structural schematic diagram of an embodiment of a detection device for a warp knitting machine for improving the detection accuracy of wire fabric defects;

[0039] Figure 2 Structural schematic diagram of another angle in an embodiment of a detection device for a warp knitting machine for improving the detection accuracy of wire fabric defects;

[0040] Figure 3Schematic diagram of the pressing structure in an embodiment of a detection device for a warp knitting machine for improving the detection accuracy of fabric defects

[0041] Figure 4 Exploded view of the pressing structure in an embodiment of a detection device for a warp knitting machine for improving the detection accuracy of fabric defects

[0042] Figure 5 For Figure 4 Enlarged view of the structure at A

[0043] Figure 6 Schematic diagram of the structure of the linear drive module and the scraper in an embodiment of a detection device for a warp knitting machine for improving the detection accuracy of fabric defects

[0044] Figure 7 Schematic diagram of the connection relationship between the connecting plate and the scraper in an embodiment of a detection device for a warp knitting machine for improving the detection accuracy of fabric defects

[0045] Figure 8 Schematic diagram of the planar structure of the side plate in an embodiment of a detection device for a warp knitting machine for improving the detection accuracy of fabric defects

[0046] In the figure: 1, workbench; 2, guide roller; 3, support plate; 4, accommodation sleeve; 5, telescopic rod; 501, limit ring; 6, first spring; 7, abutting roller; 8, connecting plate; 9, connecting shaft; 901, first limiting part; 10, trigger plate; 1001, second limiting part; 11, dialing needle; 12, side plate; 1201, first horizontal groove; 1202, first vertical groove; 1203, second horizontal groove; 1204, second vertical groove; 1205, third horizontal groove; 1206, first inclined groove; 1207, fourth horizontal groove; 1208, second inclined groove; 1209, first extension groove; 1210, second extension groove; 13, linear drive module; 14, connecting plate; 15, connecting rod; 16, second spring; 17, connecting sleeve; 18, scraper; 19, first convex shaft; 20, second convex shaft; 21, first switching member; 22, second switching member; 23, bracket; 24, camera Detailed implementation mode

[0047] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention

[0048] In addition, the components in the present invention are referred to as "fixed to" or "disposed on" another component, which can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0049] Please refer to Figures 1 to 8 , in the embodiment of the present invention, a detecting device for a warp knitting machine for improving the detecting accuracy of fabric defects includes: a workbench 1, a support plate 3, a linear driving module 13, side plates 12, a triggering assembly, and a camera 24.

[0050] A guiding roller 2 for guiding the fabric is arranged on the workbench 1, and a supporting flat plate is arranged below the camera 24 on the workbench 1, and the supporting flat plate can support the fabric.

[0051] The support plate 3 is arranged on the workbench 1, two groups of pressing structures are symmetrically arranged on the support plate 3, and the abutting rollers 7 installed on the pressing structures cooperate with the support plate 3 to be able to pull the fabric along the width direction thereof.

[0052] The pressing structure includes a hysteresis sleeve 4 fixedly connected to the support plate 3, a telescopic rod 5 is slidably installed in the hysteresis sleeve 4, and the telescopic rod 5 is rotatably connected to the abutting roller 7.

[0053] A limiting ring 501 is further arranged 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 limiting ring 501, and the other end is connected to the inner wall of the hysteresis sleeve 4.

[0054] In use, the wire fabric is drawn out from a pay-off roll or a warp knitting machine. The wire fabric passes through the guide roller 2 and is placed on the support plate 3. At this time, the abutting roller 7 is located above the wire fabric. The abutting roller 7 is inclined relative to the side of the wire fabric. Specifically, with reference to the rotating shaft of the abutting roller 7, the end of the rotating shaft far from the wire fabric is located at the rear of the direction in which the wire fabric is drawn and moves compared to the other end. In the initial state, the first spring 6 is in a compressed state, so that the abutting roller 7 has a force acting on the wire fabric, and when the wire fabric is drawn and moves, relative sliding can occur between the wire fabric and the abutting roller 7. At this time, a force (frictional force) along the width direction of the wire fabric and away from the middle of the wire fabric can be generated at the contact position between the abutting roller 7 and the wire fabric. Under the trend of this force, the abutting roller 7 and the support plate 3 cooperate to enable the wire fabric to have a force for being drawn along its width direction, so that the wire fabric can be tightened along its width direction. When the wire fabric is drawn by a winding device (not shown in the figure), it can also be subjected to a traction force along its length direction. With the cooperation of these two forces, the wire fabric can be tightened, thus effectively avoiding the generation of wrinkles and preventing the influence on the detection accuracy due to the existence of wrinkles during subsequent detection.

[0055] Please refer to Figures 6 to 8 The linear drive module 13 is connected to two sets of scrapers 18 provided on the workbench 1. The linear drive module 13 can drive the scrapers 18 to reciprocate along the width direction of the wire fabric. A first convex shaft 19 is provided at the end of the scraper 18. The scraper 18 is provided with fluff for adhering broken wires and large particle dust.

[0056] Two sets of connecting plates 14 are connected to the linear drive module 13. A connecting rod 15 is installed on the connecting plate 14. The connecting rod 15 is slidably sleeved with a connecting sleeve 17 provided on the scraper 18. A second spring 16 provided in the connecting sleeve 17 connects the inner wall of the connecting sleeve 17 and the connecting rod 15. Among them, the above-mentioned second spring 16 is always in a compressed state.

[0057] The side plate 12 is connected to the linear drive module 13. A lifting groove and a stepping groove are formed on the side plate 12. The cooperation between the first convex shaft 19 and the lifting groove can separate the scraper 18 from the wire fabric when the scraper 18 moves towards the middle of the wire fabric. The cooperation between the first convex shaft 19 and the stepping groove can make the scraper 18 step down. Specifically:

[0058] The lifting groove includes a first horizontal groove 1201 provided on the side plate 12. One end of the first horizontal groove 1201 is provided with a first extension groove 1209, and a fourth horizontal groove 1207 is provided above the first horizontal groove 1201. Both 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.

[0059] A first switching member 21 for guiding the first convex shaft 19 is rotatably installed at one end of the second extension groove 1210 away from the fourth horizontal groove 1207.

[0060] In the initial state, the first convex shaft 19 is located in the stepping groove. After the winding device steps to drive the wire fabric to move a predetermined length, 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 the first convex shaft 19 can 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. Subsequently, the first convex shaft 19 will move along the fourth horizontal groove 1207. After the first convex shaft 19 moves to the end of the fourth horizontal groove 1207, the first convex shaft 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, first, when the scraper 18 moves towards the middle of the wire fabric, it can be separated from the wire fabric, thus preventing the broken wires and large particle dust remaining on the scraper 18 from being carried back onto the wire fabric. Secondly, under the guidance of the second inclined groove 1208, the scraper 18 can move towards the wire fabric at a constant speed instead of moving instantaneously, without generating vibration, reducing the situation where the large particle dust remaining on the scraper 18 is shaken off onto the wire fabric due to vibration.

[0061] When the linear drive module 13 drives the scraper 18 to move from the middle of the wire fabric towards the side, the first convex shaft 19 can move in the first horizontal groove 1201. At this time, the scraper 18 can fit with the wire fabric, so as to scrape off the broken wires and large particle dust adhering to the wire fabric, preventing the broken wires and large particle dust from existing on the wire fabric and affecting the detection accuracy of its flaws and reducing the probability of misjudgment.

[0062] When the first convex shaft 19 moves to the end of the first horizontal groove 1201, it can abut against the first switching member 21 and drive the first switching member 21 to deflect. When the first convex shaft 19 moves into the first extension groove 1209, the first switching member 21 can be separated from the first convex shaft 19 and reset under the action of gravity, that is, the first switching member 21 has the effect of guiding the first convex shaft 19 to move in a predetermined movement direction.

[0063] With the above settings, during the movement of the scraper 18 following the linear drive module 13, when the scraper 18 moves from the middle of the wire fabric towards the side, the scraper 18 can remain in contact with the wire fabric, enabling the scraper 18 to remove broken wires and large particulate dust on the wire fabric, preventing broken wires and large particulate dust from existing on the wire fabric, affecting the detection accuracy of its flaws, and reducing the probability of misjudgment. When the scraper 18 moves from the side of the wire fabric towards the middle, the scraper 18 can remain separated from the wire fabric, thereby preventing the broken wires and large particulate dust remaining on the scraper 18 from returning to the wire fabric again, further improving the detection accuracy.

[0064] Please refer to Figure 8 , the stepping groove includes a stepped groove provided on the side plate 12 and connected to one end of the first extension groove 1209 away from the first horizontal groove 1201. When the first convex shaft 19 rolls in the stepped groove, the second spring 16 can gradually release elastic potential energy;

[0065] The stepping groove further includes a third horizontal groove 1205 connected to one end of the stepped groove away from the first extension groove 1209. One end of the third horizontal groove 1205 is connected to a first inclined groove 1206, and the first inclined groove 1206 is collinear and communicated with the second extension groove 1210;

[0066] A second switching member 22 is rotatably installed at one end of the first inclined groove 1206 away from the third horizontal groove 1205;

[0067] 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 a second horizontal groove 1203, the end of the second horizontal groove 1203 is connected to a second vertical groove 1204, and the second vertical groove 1204 is connected to the third horizontal groove 1205;

[0068] Wherein, dial pins 11 are provided on both sides of the workbench 1, and the dial pins 11 can remove the broken wires adhered to and wound around the scraper 18.

[0069] 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, thereby shaking off the large particles of dust and broken wires with poor adhesion adhering to the scraper 18. 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 The spring 16 releases its elastic potential energy again, allowing the scraper 18 to perform a vibration action again to shake off the large particles of dust and broken wires with poor adhesion that are adhered to the scraper 18 for a second time. Subsequently, 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 broken wires and large particles of dust, thereby further ensuring the detection accuracy.

[0070] 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.

[0071] 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.

[0072] For the convenience of understanding, during the reciprocating movement of the squeegee 18, the movement path of the first convex shaft 19 can be referred to the path indicated by the arrow in the attached Figure 8 figure, and its path is a horizontally - placed "8" - shaped path.

[0073] Please refer to Figures 4 to 5 , the triggering component is connected to the connecting plate 14, and the triggering component can make the abutting roller 7 perform a lifting action when the squeegee 18 moves to the end of the wire fabric;

[0074] The triggering component 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 triggering plate 10 is rotatably installed on the connecting shaft 9;

[0075] The triggering plate 10 is connected to the connecting shaft 9 through an abutting structure. The abutting structure can be locked after the triggering plate 10 deflects towards one side to a predetermined angle. The abutting structure includes a first limiting portion 901 provided on the connecting shaft 9, and the first limiting portion 901 is adapted to a second limiting portion 1001 provided on the rotating shaft of the triggering plate 10;

[0076] The camera 24 is arranged on the upper part of the workbench 1. The camera 24 is used for image acquisition of the defects on the wire fabric. Specifically, the camera 24 is connected to the side plate 12 through a bracket 23.

[0077] When the squeegee 18 moves from the middle of the wire fabric towards the side, due to the certain pressing force it exerts on the wire fabric and the supporting force of the supporting flat plate on the wire fabric, the wire fabric can be clamped between the squeegee 18 and the supporting flat plate at this time, which can improve the acting force of the squeegee 18 on the wire fabric and improve the removal effect of broken wires and large - particle dust. When the squeegee 18 moves towards the side of the wire fabric, the squeegee 18 has the effect of pulling the wire fabric along its width direction and causing a certain deformation of the wire fabric. When the squeegee 18 moves to the side of the wire fabric, there is a certain fold in the wire fabric between the abutting roller 7 and the squeegee 18. At this time, the second convex shaft 20 can act on the triggering plate 10 and make the triggering plate 10 deflect. After the triggering plate 10 deflects to a predetermined angle, the first limiting portion 901 abuts against the second limiting portion 1001, making the triggering plate 10 unable to deflect again. At this time, the triggering plate 10 cooperates with the second convex shaft 20 to separate the abutting roller 7 from the wire fabric, release the fold degree of the wire fabric between the abutting roller 7 and the squeegee 18. When the triggering plate 10 separates from the second convex shaft 20, the abutting roller 7 abuts against the wire fabric again, making the wire fabric in this state have a certain tensioning effect, and to a certain extent, it can expose the defects hidden inside the wire fabric for easy detection.

[0078] 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.

[0079] 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.

[0080] 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:

[0081] Step 1: The traction line fabric passes through the guide roller 2 and is wound on the winding device;

[0082] 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;

[0083] 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;

[0084] 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;

[0085] 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.

[0086] 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.

[0087] It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics thereof. Therefore, in all respects, the embodiments should be considered exemplary and non-limiting, and the scope of the present invention is defined by the appended claims rather than the above description. Accordingly, all changes that fall within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claim concerned.

[0088] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only a single technical solution. This narrative manner of the specification is merely for clarity, and those skilled in the art should regard the specification as a whole. The technical solutions in the various embodiments can also be appropriately combined to form other embodiments 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 guide rollers for guiding the wire fabric; A support plate is arranged on the workbench, two sets of pressure structures are symmetrically arranged on the support plate, and abutment rollers installed on the pressure structures cooperate with the support plate to pull the line fabric along its width direction; A linear drive module is connected to two sets of scrapers arranged on the workbench, the linear drive module can drive the scrapers to reciprocate along the width direction of the fabric, and the ends of the scrapers are provided with first convex shafts; A side plate 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 moving 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 assembly connected to the pressure structure, wherein the trigger assembly can cause the abutting 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 is used to collect images of defects on the thread fabric; The linear drive module is connected to two sets of connecting plates, the connecting plates are equipped with connecting rods, the connecting rods are slidably fitted with connecting sleeves arranged on the scraper, and the second spring arranged in the connecting sleeves connects the inner wall of the connecting sleeves and the connecting rods; One end of the connecting plate is connected to the trigger assembly; The lifting slot includes a first horizontal slot arranged on the side plate, a first extension slot is arranged at one end of the first horizontal slot, and a fourth horizontal slot is arranged on the upper part of the first horizontal slot, and both ends of the fourth horizontal slot are connected to the first horizontal slot through a second extension slot and a second inclined slot; The step groove comprises a stepped groove provided on the side plate and connected to an end of the first extension groove away from the first horizontal groove, and when the first convex shaft rolls in the stepped groove, the second spring can release elastic potential energy step by step; The step groove further 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 a first inclined groove, and the first inclined groove is collinear and connected with the second extension groove; 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.

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 comprises 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 abutting roller; The telescopic rod is also provided with a limit ring, and the telescopic rod is sleeved with a first spring, one end of the first spring is connected to the limit 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 1, characterized in that: A first switching member for guiding the first convex shaft is rotatably mounted on one end of the second extension groove away from the fourth horizontal groove.

4. The detection device for warp knitting machine for improving the detection accuracy of thread fabric defects according to claim 1, characterized in that: A second switching member is rotatably mounted on one end of the first inclined slot away from the third horizontal slot.

5. The detection device for warp knitting machine for improving the detection accuracy of thread fabric defects according to claim 2, characterized in that: The trigger assembly comprises a second convex shaft rotatably connected to the link 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 is connected to the connecting shaft via an abutment structure, and the abutment structure can be locked after the trigger plate is swung to one side to a predetermined angle.

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 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.

7. 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 6, 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.

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