A device for detecting a bending defect of an underwear tape

Abstract

This invention discloses a device for detecting defects in the bending of underwear webbing, relating to the field of webbing quality inspection technology. It includes a bed, and further comprises an anti-torsion limiting component, a flattening component, a traction component, a floating tensioning component, a positioning pressure roller component, and an optical inspection component. The anti-torsion limiting component, flattening component, traction component, floating tensioning component, and positioning pressure roller component are sequentially assembled on the upper part of the bed along the webbing's travel direction. The optical inspection component is located behind the positioning pressure roller component. The anti-torsion limiting component includes a bidirectional ball screw and multiple V-shaped wheels, used to limit the webbing on both sides and suppress webbing deviation and axial torsion. Through the coordinated operation of the anti-torsion limiting component, flattening component, floating tensioning component, and optical inspection component, the device improves upon the problems of high false detection and false negative rates, insufficient tension control stability, poor webbing posture control, and unreasonable defect handling in existing detection devices, thereby enhancing the accuracy of bending defect detection and the stability of mass production operation.

Description

Technical Field

[0001] This invention relates to the field of webbing quality inspection technology, specifically to a device for detecting bending defects in underwear webbing. Background Technology

[0002] As the core execution unit for identifying and screening defects such as bending, wrinkles, and deformation in the production process of elastic underwear webbing, the underwear webbing bending defect detection device is a key component that determines the appearance qualification rate, size consistency, subsequent sewing adaptability, and mass production stability of underwear webbing products.

[0003] Existing devices for detecting defects in underwear webbing bends mostly employ a technical approach combining optical imaging detection, simple pre-positioning and straightening, and continuous conveying. During operation, an optical camera captures images of the webbing, and simple vertical rollers or single-sided edge stops provide limiting. Tension is adjusted using a single-stage spring or manually, and continuous conveying is achieved by a conveyor belt or traction roller. Given the susceptibility of elastic webbing to deformation and the diverse forms of bend defects, this approach has the following limitations: the pre-positioning structure is relatively rudimentary; the double-sided limiting lacks a circumferential constraint, making the webbing prone to deviation and axial torsion, leading to false positives; the flattening mechanism struggles to eliminate wrinkles and warps, which are easily misidentified as bends after optical imaging. The existing equipment suffers from several drawbacks. Single-stage tension control struggles to adapt to the instantaneous fluctuations of elastic webbing, leading to imaging distortion due to webbing vibration. Separate arrangement of finishing and inspection processes results in the finishing effect easily diminishing during transport. The lack of closed-loop tension feedback causes tension deviations to accumulate over long-term operation. Furthermore, the failure to synchronize optical inspection with webbing speed makes it difficult to avoid missed defects and positioning errors. Defect handling relies on cutting the webbing, resulting in material waste, production interruptions, and low changeover efficiency. These factors limit the improvement in inspection accuracy and product consistency of existing equipment, making it difficult to control false positives and false negatives. Further improvements in the quality of underwear webbing production and inspection, as well as batch production efficiency, are thus constrained. Summary of the Invention

[0004] The purpose of this invention is to provide a device for detecting defects in the bending of underwear webbing, in order to solve the problems mentioned in the background art, such as the lack of circumferential constraint in the pre-processing causing the webbing to deviate and twist, resulting in false detections; the difficulty of single-level tension control in adapting to elastic fluctuations, causing imaging distortion and missed detection due to instantaneous jitter; the failure of optical detection and conveying speed to be locked synchronously, resulting in defect positioning deviations; and the problem of material waste and production cycle interruption caused by defect segment cutting.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a device for detecting defects in the bending of underwear webbing, comprising: a bed, an anti-torsion limiting component, a flattening component, a traction component, a floating tensioning component, a positioning pressure roller component, and an optical detection component; The anti-torsion limiting component, flattening component, traction component, floating tensioning component and positioning pressure roller component are sequentially assembled on the upper part of the bed along the webbing travel direction, and the optical detection component is located on the rear side of the positioning pressure roller component; The anti-torsion limiting component includes a bidirectional ball screw and multiple V-shaped wheels, which are used to limit the webbing on both sides and suppress the webbing deviation and axial torsion. The flattening component includes multiple arc-shaped segments and multiple L-shaped fixing segments, used to eliminate transverse wrinkles and edge warping of the webbing; The floating tensioning assembly includes a worm gear, a rotating shaft, a coarse adjustment screw, a fine adjustment screw, and a damping gas spring. The inner surface of the worm gear is fixedly connected to the rotating shaft. The top of the rotating shaft has a threaded hole that is threaded into the coarse adjustment screw, which is used for webbing tension control and instantaneous vibration buffering. The traction assembly is used to provide continuous power for conveying the webbing; The positioning pressure roller assembly is used for stable pressure conveying of the webbing; The optical inspection component is used for the detection and marking of defects in webbing bends.

[0006] Preferably, the anti-torsion limiting assembly further includes multiple first bearing seats and multiple base nuts. The two ends of the bidirectional ball screw are supported by multiple first bearing seats. The left and right sections of the bidirectional ball screw are respectively left-hand thread and right-hand thread. One end of the bidirectional ball screw is fixedly connected to a first handwheel. Multiple base nuts are screwed into the corresponding thread sections. Each base nut has a vertical shaft fixed to its upper part. Each vertical shaft has an annular sleeve fitted on its outer side. Each annular sleeve has a V-shaped wheel mounted on its outer side through a bearing. Each annular sleeve has a set screw threaded on its sidewall. In the two V-shaped wheels arranged opposite each other, the lower surface of the upper V-shaped wheel and the upper surface of the lower V-shaped wheel are provided with inclined surfaces. The two inclined surfaces face each other to form a V-shaped groove, and the groove opening faces the webbing side.

[0007] Preferably, the flattening assembly further includes multiple fixed seats, multiple adjusting brackets, and multiple slides. Each fixed seat and the inner wall of the slide are fixedly connected to a corresponding L-shaped fixed section. Each slide is vertically slidably engaged with a corresponding adjusting bracket. The multiple adjusting brackets are vertically fixed above the bed. One end of each L-shaped fixed section is embedded with a ball bearing. Both ends of each arc-shaped section are integrally provided with a shaft head. Each shaft head is rotatably mounted on the end of the L-shaped fixed section through a corresponding ball bearing. The outer wall of each arc-shaped section is fitted with an anti-wear sleeve.

[0008] Preferably, the traction assembly includes multiple second bearing seats, a traction roller body, a servo motor, and a first tension sensing unit. The two ends of the traction roller body are supported and fixed above the bed by multiple second bearing seats. The output end of the servo motor is connected to one end of the traction roller body for transmission. The first tension sensing unit is fixed to the feed side of the traction roller body by an L-shaped bracket.

[0009] Preferably, the floating tensioning assembly further includes multiple slide rails, a second tension sensing unit, and a worm gear. The worm gear meshes with a worm wheel for transmission. A second handwheel is connected to the outer end of the worm gear. A nut seat is fixed to the top of the coarse adjustment screw. The fine adjustment screw and the damping gas spring are arranged vertically in parallel above the nut seat. The lower end of the fine adjustment screw is fixed above the nut seat. A fine adjustment knob is provided at the upper end of the fine adjustment screw.

[0010] Preferably, the upper and lower ends of the damping gas spring are respectively provided with a first ball joint and a second ball joint. The lower end of the damping gas spring is hinged to the nut seat above through the second ball joint, and the upper end of the damping gas spring is hinged to the bottom of the connecting plate through the first ball joint.

[0011] Preferably, each slide rail is slidably fitted with a slider, a floating roller is rotatably mounted between the multiple sliders, the bottom of each slider is fixed to the upper surface of the connecting plate, and the second tension sensing unit is fixed to one side of one of the slide rails.

[0012] Preferably, the positioning pressure roller assembly includes multiple third bearing seats, a third tension sensing unit, multiple silicone roller bodies, multiple guide posts, and multiple fourth bearing seats. The multiple silicone roller bodies are arranged in an upper and lower opposing configuration. The two ends of the lower silicone roller body are supported by multiple third bearing seats, and the two ends of the upper silicone roller body are supported by multiple fourth bearing seats. The power input end of the lower silicone roller body is connected to the traction roller body for transmission. Each guide post is fixed above the corresponding third bearing seat, and each fourth bearing seat is vertically slidingly engaged with the corresponding guide post. The third tension sensing unit is located on one side of one of the third bearing seats.

[0013] Preferably, the optical inspection assembly includes multiple support frames, a crossbeam, multiple CCD cameras, a backlight board, a metal bracket, a pneumatic marking needle, and a synchronous encoder. The multiple support frames are fixed above the bed, the crossbeam is mounted on the upper end of the multiple support frames, the multiple CCD cameras are suspended below the crossbeam, and the backlight board is correspondingly located on the bottom side of the webbing directly below the multiple CCD cameras.

[0014] Preferably, the metal bracket is fixed above the feed bed on the discharge side of the optical detection component, the pneumatic marking needle is installed on the side of the webbing through the metal bracket, and the synchronous encoder is coaxially installed on the shaft end of the lower silicone roller. The synchronous encoder is used to collect the webbing travel speed and synchronize and match the signals collected by multiple CCD cameras.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In this invention, the coordinated operation of the anti-torsion limiting component, the flattening component, the floating tensioning component, and the optical detection component improves upon the problems of high false detection and false negative rates, insufficient tension control stability, poor webbing posture control, and unreasonable defect handling in existing detection devices, thereby enhancing the accuracy of bent belt defect detection and the stability of mass production operation. In the anti-torsion limiting component, a bidirectional ball screw drives the base nut to move the vertical shaft synchronously. The V-shaped wheel achieves height adjustment through an annular sleeve and a set screw. The V-groove forms a circumferential limiting mechanism, suppressing webbing deviation and axial torsion, and reducing false bends. In the flattening component, the L-shaped fixed section cooperates with the ball bearing to allow the arc section to rotate freely. The anti-wear sleeve reduces surface wear on the webbing. The adjusting bracket and the slide work together to adapt the spacing between the upper and lower arc sections, eliminating webbing defects. Lateral wrinkles and edge warping; in the floating tensioning assembly, the worm gear and worm wheel mesh for transmission, the inner ring of the worm wheel is fixed to the rotating shaft, the threaded hole at the top of the rotating shaft cooperates with the coarse adjustment screw to achieve lifting adjustment, the fine adjustment screw and the damping gas spring are arranged in parallel, and together with the three-point tension sensing unit, a closed-loop control is formed to suppress the instantaneous vibration of the webbing. The silicone roller body of the positioning pressure roller assembly and the guide column work together to achieve stable pressure conveying of the webbing; in the optical inspection assembly, the support frame and the cross frame fix the CCD camera, the backlight plate provides a uniform transmitted light field, the synchronous encoder ensures that the image acquisition and the webbing movement are synchronized, and the pneumatic marking needle realizes online marking of defects, reducing material waste. With the synergistic effect of each component, the accuracy of bending defect identification and positioning precision is improved, the consistency of underwear webbing products is improved, the service life of the device is extended, and the efficiency of mass production is improved. Attached Figure Description

[0016] Figure 1 This is a perspective view of the main structure in this invention; Figure 2 This is a three-dimensional view of the structure from below in this invention; Figure 3 This is a schematic diagram of the installation position structure of the anti-torsion limiting component in this invention; Figure 4 This is a schematic diagram of the installation position structure of the flattening component in this invention; Figure 5 This is a schematic diagram of the installation positions of the ball bearing, the arc segment, and the shaft head in this invention; Figure 6 This is a schematic diagram of the installation position structure of the traction component in this invention; Figure 7 This is a schematic diagram of the installation position structure of the floating tensioning component in this invention; Figure 8 This is a schematic diagram showing the installation positions of the rotating shaft, coarse adjustment screw, and nut seat in this invention. Figure 9 for Figure 8 Enlarged 3D view at point A in the middle; Figure 10 This is a schematic diagram showing the installation position of the positioning pressure roller assembly and the optical detection assembly in this invention; Figure 11 This is a schematic diagram of the installation location structure of the optical detection component in this invention.

[0017] In the diagram: 100, Bed; 200, Anti-torsion limiting assembly; 201, First bearing seat; 202, Bidirectional ball screw; 203, Base nut; 204, Vertical shaft; 205, Annular sleeve; 206, V-shaped wheel; 207, V-groove; 208, Set screw; 209, First handwheel; 300, Flattening assembly; 301, Fixed seat; 302, Adjusting bracket; 303, Slide; 304, L-shaped fixed section; 305, Ball bearing; 306, Arc-shaped section; 307, Shaft head; 308, Anti-wear sleeve; 400, Traction assembly; 401, Second bearing seat; 402, Traction roller; 403, Servo motor; 404, First tension sensing unit; 500, Floating tensioning assembly; 501, Slide rail; 502, Slider; 503, Floating... Roller body; 504, Second tension sensing unit; 505, Connecting plate; 506, Worm gear; 507, Worm wheel; 508, Second handwheel; 509, Rotating shaft; 510, Coarse adjustment screw; 511, Nut seat; 512, Fine adjustment screw; 513, Micro-adjustment knob; 514, First ball joint; 515, Damping gas spring; 516, Second ball joint; 600, Positioning pressure roller assembly; 601, Third bearing seat; 602, Third tension sensing unit; 603, Silicone roller body; 604, Guide post; 605, Fourth bearing seat; 700, Optical inspection assembly; 701, Support frame; 702, Cross frame; 703, CCD camera; 704, Backlight board; 705, Metal bracket; 706, Pneumatic marking needle; 707, Synchronous encoder. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figures 1-2As shown, this embodiment provides a device for detecting defects in the bending of underwear webbing. The whole machine uses the bed 100 as a rigid load-bearing base to provide a stable mounting carrier for each working component. The anti-torsion limiting component 200, the flattening component 300, the traction component 400, the floating tensioning component 500, and the positioning pressure roller component 600 are assembled sequentially along the direction of webbing travel. The optical detection component 700 is fixed to the rear side of the positioning pressure roller component 600. The components are arranged in an orderly manner to form a continuous operation link, which works together to complete the webbing limiting, flattening, tension control and defect detection.

[0020] like Figure 3 As shown, the anti-torsion limiting component 200 uses a bidirectional ball screw 202 as the core for pitch adjustment. Both ends of the bidirectional ball screw 202 are stably supported by the first bearing seat 201. The left and right sections of the bidirectional ball screw 202 are respectively provided with left-hand and right-hand threads. One end is fixedly equipped with a first handwheel 209 for manually driving the screw to rotate to achieve pitch adjustment. The base nut 203 is screwed onto the corresponding threaded section. The upper part is fixed with a vertical shaft 204. An annular sleeve 205 that can slide up and down is sleeved on the outside of the vertical shaft 204. A V-shaped wheel 206 is rotated and assembled on the outside of the annular sleeve 205 through a bearing. A set screw 208 is installed on the side wall thread to lock the height position of the annular sleeve 205. The two sets of V-shaped wheels 206 arranged opposite each other have matching inclined surfaces machined on their opposite end faces. The two inclined surfaces face each other to form a V-shaped groove 207 with the groove opening facing the side of the webbing, which is used to form double-sided constraint on the webbing and reduce the webbing deviation and axial torsion.

[0021] like Figures 4-5 As shown, the flattening assembly 300 uses a fixed base 301, an adjusting bracket 302, and a slide 303 as its supporting structure. The adjusting bracket 302 is vertically fixed above the bed 100. The slide 303 and the adjusting bracket 302 form a vertical sliding fit. The inner walls of the fixed base 301 and the slide 303 are fixedly connected to the corresponding L-shaped fixed sections 304. A ball bearing 305 is embedded in one end of the L-shaped fixed section 304. The shaft heads 307 integrally formed at both ends of the arc-shaped section 306 are rotatably installed at the ends of the L-shaped fixed section 304 through the ball bearings 305. A removable anti-wear sleeve 308 is fitted on the outer wall of the arc-shaped section 306 for free rotation as the webbing moves, gradually flattening the transverse wrinkles and edge warping of the webbing.

[0022] like Figure 6 As shown, the traction assembly 400 uses the second bearing seat 401 as a support component. The two ends of the traction roller body 402 are assembled inside the second bearing seat 401 and fixed above the bed 100. The output end of the servo motor 403 is connected to the traction roller body 402 for transmission, providing stable power for continuous conveying of the webbing. The first tension sensing unit 404 is fixed to the feed side of the traction roller body 402 by a bracket, and collects the tension state at the feed end of the webbing to provide data reference for subsequent tension control.

[0023] like Figures 7-9 As shown, the floating tensioning assembly 500 uses a slide rail 501 and a slider 502 as its vertical guide structure. The slider 502 is used for stable vertical sliding along the slide rail 501. The floating roller 503 is rotatably mounted between the two sets of sliders 502. The bottoms of the sliders 502 are fixed to the upper surface of the connecting plate 505. The worm gear 506 and the worm wheel 507 mesh with each other for transmission. The outer end of the worm gear 506 is connected to the second handwheel 508. The inner surface of the worm wheel 507 is fixedly connected to the rotating shaft 509. The top of the rotating shaft 509 has a threaded hole that is threaded into the coarse adjustment screw 510 to convert the rotational motion into vertical lifting displacement. The top of the coarse adjustment screw 510 is fixed with a screw. The female seat 511, the fine-tuning screw 512 and the damping gas spring 515 are arranged vertically in parallel above the nut seat 511. The fine-tuning screw 512 is equipped with a fine-tuning knob 513 at its upper end for fine tension adjustment. The damping gas spring 515 is equipped with a first ball joint 514 and a second ball joint 516 at its upper and lower ends, respectively. The lower end is hinged to the nut seat 511 above the second ball joint 516, and the upper end is hinged to the bottom of the connecting plate 505 through the first ball joint 514. This is used to buffer the instantaneous tension fluctuations of the webbing during its movement. The second tension sensing unit 504 is fixed to one side of the slide rail 501 to assist in collecting tension change data.

[0024] like Figure 10 As shown, the positioning pressure roller assembly 600 uses the third bearing seat 601 and the fourth bearing seat 605 as the support structure. Multiple silicone rollers 603 are arranged in an upper and lower pressing manner. The two ends of the lower silicone roller 603 are supported by the third bearing seat 601, and the power input end is connected to the traction roller 402 to maintain synchronous conveying speed. The two ends of the upper silicone roller 603 are supported by the fourth bearing seat 605. The guide post 604 is fixed above the third bearing seat 601. The fourth bearing seat 605 and the guide post 604 form a vertical sliding fit, which can adapt to the pressing requirements of webbing of different thicknesses. The third tension sensing unit 602 is arranged on one side of the third bearing seat 601, and forms multi-point tension monitoring with the preceding sensing components.

[0025] like Figure 11As shown, the optical inspection component 700 uses a support frame 701 and a cross frame 702 as its mounting carriers. The support frame 701 is fixed above the bed 100, and the cross frame 702 is mounted on the upper end of the support frame 701. Multiple CCD cameras 703 are suspended below the cross frame 702. The backlight plate 704 is arranged directly below the CCD cameras 703 and on the bottom side of the webbing to form a uniform transmissive inspection light field. The metal bracket 705 is fixed above the bed 100 on the discharge side of the optical inspection component 700. The pneumatic marking needle 706 is installed on the side of the webbing through the metal bracket 705 to mark defective parts online. The synchronous encoder 707 is coaxially mounted on the shaft end of the lower silicone roller 603 to collect the real-time travel speed of the webbing and to synchronize with the signal collected by the CCD camera 703, thereby improving imaging stability and defect positioning accuracy.

[0026] In use, after the device is assembled and debugged, it is put into the inspection of defects in the bending of underwear webbing. First, according to the width specification of the webbing to be inspected, the first handwheel 209 is rotated to drive the bidirectional ball screw 202 to rotate, and the distance between the two V-shaped wheels 206 is adjusted so that the side of the webbing is smoothly inserted into the V-groove 207. Then, the height of the annular sleeve 205 is adjusted and the set screw 208 is tightened to match the thickness of the webbing. Then, the vertical height of the slide 303 is adjusted by adjusting the bracket 302, and the gap between the upper and lower arc sections 306 is set so that the webbing passes through smoothly and is evenly flattened. The second handwheel 508 is rotated to drive the worm gear 506 and worm wheel 507. The basic height of the floating roller 503 is adjusted by the coarse adjustment screw 510, and the fine adjustment screw 512 is adjusted by the fine adjustment knob 513, in conjunction with the damping gas spring 51. 5. To stabilize the tension of the webbing, the servo motor 403 is started to drive the traction roller 402 to rotate, causing the webbing to move forward at a constant speed. The first tension sensing unit 404, the second tension sensing unit 504, and the third tension sensing unit 602 collect tension data in real time. Together with the floating tensioning component 500, the webbing tension is kept stable. After being steadily conveyed by the positioning pressure roller component 600, the webbing enters the optical inspection area. The backlight plate 704 continuously provides uniform transmitted light. The CCD camera 703 continuously collects images of the webbing surface. The synchronous encoder 707 ensures that the image acquisition is synchronized with the webbing speed. When defects such as bending or deformation are detected, the pneumatic marking needle 706 moves immediately to complete the identification mark on the side of the webbing. The webbing that has been sorted and marked with defects is continuously sent out of the device to complete the continuous online inspection operation.

Claims

1. A device for detecting defects in the bending of underwear webbing, comprising: The bed (100), anti-torsion limiting assembly (200), flattening assembly (300), traction assembly (400), floating tensioning assembly (500), positioning pressure roller assembly (600), and optical detection assembly (700) are characterized by: The anti-torsion limiting component (200), flattening component (300), traction component (400), floating tensioning component (500) and positioning pressure roller component (600) are sequentially assembled on the upper part of the bed (100) along the webbing travel direction, and the optical detection component (700) is located on the rear side of the positioning pressure roller component (600); The anti-torsion limiting component (200) includes a bidirectional ball screw (202) and multiple V-shaped wheels (206) for limiting the webbing on both sides and suppressing the webbing deviation and axial torsion. The flattening component (300) includes multiple arc-shaped segments (306) and multiple L-shaped fixing segments (304) for eliminating transverse wrinkles and edge warping of the webbing; The floating tensioning assembly (500) includes a worm gear (507), a rotating shaft (509), a coarse adjustment screw (510), a fine adjustment screw (512), and a damping gas spring (515). The inner surface of the worm gear (507) is fixedly connected to the rotating shaft (509). The top end of the rotating shaft (509) has a threaded hole that is threaded into the coarse adjustment screw (510) for webbing tension control and instantaneous vibration buffering. The traction assembly (400) is used to provide continuous conveying power for the webbing; The positioning pressure roller assembly (600) is used for stabilizing and conveying the webbing; The optical inspection component (700) is used for the inspection and marking of defects in the webbing bends.

2. The underwear webbing bending defect detection device according to claim 1, characterized in that: The anti-torsion limiting assembly (200) also includes multiple first bearing seats (201) and multiple base nuts (203). The two ends of the bidirectional ball screw (202) are supported by multiple first bearing seats (201). The left and right sections of the bidirectional ball screw (202) are left-hand threads and right-hand threads, respectively. A first handwheel (209) is fixedly connected to one end of the bidirectional ball screw (202). Multiple base nuts (203) are screwed into the corresponding thread sections. Each base nut (203) has a fixed upper part. A vertical shaft (204) is fitted with an annular sleeve (205) on its outer side. A V-shaped wheel (206) is rotatably mounted on the outer side of each annular sleeve (205) via a bearing. A set screw (208) is threaded onto the side wall of each annular sleeve (205). In the two V-shaped wheels (206) arranged opposite each other, the lower surface of the upper V-shaped wheel and the upper surface of the lower V-shaped wheel are provided with inclined surfaces. The two inclined surfaces face each other to form a V-shaped groove (207), and the groove opening of the V-shaped groove (207) faces the webbing side.

3. The underwear webbing bending defect detection device according to claim 1, characterized in that: The flattening assembly (300) also includes multiple fixed seats (301), multiple adjusting brackets (302), and multiple slides (303). Each fixed seat (301) and the inner wall of the slide (303) are fixedly connected to a corresponding L-shaped fixed section (304). Each slide (303) is vertically slidably engaged with a corresponding adjusting bracket (302). The multiple adjusting brackets (302) are vertically fixed above the bed (100). One end of each L-shaped fixed section (304) is embedded with a ball bearing (305). Both ends of each arc-shaped section (306) are integrally provided with a shaft head (307). Each shaft head (307) is rotatably mounted on the end of the L-shaped fixed section (304) through a corresponding ball bearing (305). The outer wall of each arc-shaped section (306) is fitted with an anti-wear sleeve (308).

4. The underwear webbing bending defect detection device according to claim 1, characterized in that: The traction assembly (400) includes multiple second bearing seats (401), a traction roller body (402), a servo motor (403), and a first tension sensing unit (404). The two ends of the traction roller body (402) are supported and fixed above the bed (100) by multiple second bearing seats (401). The output end of the servo motor (403) is connected to one end of the traction roller body (402) for transmission. The first tension sensing unit (404) is fixed to the feed side of the traction roller body (402) by an L-shaped bracket.

5. The underwear webbing bending defect detection device according to claim 1, characterized in that: The floating tensioning assembly (500) also includes multiple slide rails (501), a second tension sensing unit (504), and a worm gear (506). The worm gear (506) meshes with a worm wheel (507) for transmission. The outer end of the worm gear (506) is connected to a second handwheel (508). The top end of the coarse adjustment screw (510) is fixed with a nut seat (511). The fine adjustment screw (512) and the damping gas spring (515) are arranged vertically in parallel above the nut seat (511). The lower end of the fine adjustment screw (512) is fixed above the nut seat (511). The upper end of the fine adjustment screw (512) is provided with a fine adjustment knob (513).

6. The underwear webbing bending defect detection device according to claim 5, characterized in that: The damping gas spring (515) has a first ball joint (514) and a second ball joint (516) at its upper and lower ends, respectively. The lower end of the damping gas spring (515) is hinged to the nut seat (511) above through the second ball joint (516), and the upper end of the damping gas spring (515) is hinged to the bottom of the connecting plate (505) through the first ball joint (514).

7. The underwear webbing bending defect detection device according to claim 5, characterized in that: Each slide rail (501) is slidably fitted with a slider (502), and a floating roller (503) is rotatably mounted between the multiple sliders (502). The bottom of each slider (502) is fixed to the upper surface of the connecting plate (505), and the second tension sensing unit (504) is fixed to one side of one of the slide rails (501).

8. The underwear webbing bending defect detection device according to claim 1, characterized in that: The positioning pressure roller assembly (600) includes multiple third bearing seats (601), a third tension sensing unit (602), multiple silicone rollers (603), multiple guide posts (604), and multiple fourth bearing seats (605). The multiple silicone rollers (603) are arranged in an upper and lower pressing configuration. The two ends of the lower silicone roller (603) are supported by multiple third bearing seats (601), and the two ends of the upper silicone roller (603) are supported by multiple fourth bearing seats (605). The power input end of the lower silicone roller (603) is connected to the traction roller (402). Each guide post (604) is fixed above the corresponding third bearing seat (601), and each fourth bearing seat (605) is vertically slidingly engaged with the corresponding guide post (604). The third tension sensing unit (602) is located on one side of one of the third bearing seats (601).

9. The underwear webbing bending defect detection device according to claim 1, characterized in that: The optical inspection assembly (700) includes multiple support frames (701), a crossbeam (702), multiple CCD cameras (703), a backlight plate (704), a metal bracket (705), a pneumatic marking needle (706), and a synchronous encoder (707). The multiple support frames (701) are fixed above the bed (100). The crossbeam (702) is mounted on the upper end of the multiple support frames (701). The multiple CCD cameras (703) are suspended below the crossbeam (702). The backlight plate (704) is correspondingly located on the bottom side of the webbing directly below the multiple CCD cameras (703).

10. The underwear webbing bending defect detection device according to claim 9, characterized in that: The metal bracket (705) is fixed above the feed bed (100) on the discharge side of the optical detection component (700). The pneumatic marking needle (706) is installed on the side of the webbing through the metal bracket (705). The synchronous encoder (707) is coaxially installed on the shaft end of the lower silicone roller (603). The synchronous encoder (707) is used to collect the webbing travel speed and synchronize the signals collected by multiple CCD cameras (703).

Images