Zipper visual inspection device

Abstract

The invention relates to the technical field of zipper visual inspection, and discloses a zipper visual inspection device, which comprises a puller detection part, a zipper detection part, a cutting part and a finished product classification part which are connected in sequence, the puller detection part comprises a puller positioning device, a puller detection device and a zipper positioning and adjusting device which are sequentially arranged in the zipper conveying direction, the position of the puller positioning device relative to the puller detection device is adjustable, and the puller positioning device is used for adjusting the distance between a puller and an upper stop of a next zipper in a matched mode; the position of the zipper positioning and adjusting device relative to the puller detection device is adjustable, and the zipper positioning and adjusting device is used for being matched with zippers of different lengths so that a puller and an upper stopper of a previous zipper and a lower stopper of a next zipper can be located within the detection range of the first detection lens all the time. The zipper detection device can be universally used for detecting various zippers with different lengths, and the detection misjudgment rate during detection of the zippers with different specifications is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of zipper visual inspection, and in particular to a zipper visual inspection device. Background Art

[0002] Zippers are connectors used to connect or separate items and are widely used in clothing, bags, and other everyday items. Zippers primarily consist of a fabric tape, the elements attached to the tape, a top stop, a bottom stop, and a slider. Zipper defects are inevitable during production. If untested, these defects can directly impact the quality of the zippered product. Therefore, zipper defect detection is essential.

[0003] Visual inspection is a common zipper inspection technology. Machine vision products convert zippers into image signals, which are then transmitted to a dedicated image processing system. These signals are then converted into digital signals based on information such as pixel distribution, brightness, and color. The image system then performs various operations on these signals to extract target features and, based on the results, determine whether the zipper is acceptable. For example, Chinese invention patent application publication number CN112189951A discloses a zipper production device and zipper processing method with visual inspection capabilities. This device utilizes an adjustment unit, primarily consisting of a first guide wheel, a second guide wheel, and a movable pulley, to adjust the total length of the interleaved zippers. Without moving the visual inspection unit, the device ensures that the bottom stop of a zipper is within the visual inspection unit's field of view before production, allowing the visual inspection unit to perform a complete visual inspection of the zipper. Beyond inputting relevant adjustment parameters into the machine, no additional manual operation is required, resulting in simple operation and precise adjustment. This zipper processing method captures the zipper in motion, performs multiple classification and comparison, and then logically determines whether the entire zipper is acceptable. Finally, the finished zippers are sorted and counted, replacing manual inspection and sorting, reducing labor intensity and reducing low-level errors such as missed inspections and misdetections. However, this invention has a drawback: the bottom stop, chain teeth, zipper slider, open chain teeth, top stop, top tape head, and fabric tape are all photographed for inspection, which can easily lead to misjudgment due to image clarity and stability.

[0004] For example, the Chinese utility model patent with authorization announcement number CN208443750U discloses a visual inspection device for reducing the error rate of visual inspection, which mainly includes a shooting support platform, a zipper tightening device and a camera device mounted above the shooting support platform. The zipper tightening device is used to tighten the zipper. The shooting support platform has a groove extending in the left and right directions for the sprockets to be placed. The groove is provided with a first step, a second step and a third step corresponding to the bottom stop, the top stop and the slider respectively.

[0005] Although the above-mentioned utility model can realize the photographing detection of the upper stop, lower stop and slider of the zipper, one detection device is only applicable to the detection of zippers of one specification and is difficult to be commonly used for the detection of zippers of various different lengths. Also, due to the existence of the first step, second step and third step, it is also difficult to be integrated into an automated device. Summary of the Invention

[0006] The purpose of the present invention is to provide an automated zipper vision detection device that is applicable to the detection of zippers of various different lengths, can adjust the position of the slider according to different zipper specifications and always keep the slider, upper stop and lower stop within the effective detection range, reducing the detection misjudgment rate. Furthermore, to solve one or more technical problems existing in the prior art, at least provide a beneficial choice or create conditions.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions.

[0008] A zipper vision detection device, which includes a slider detection part, a zipper detection part, a cutting part and a finished product classification part connected in sequence. The slider detection part detects defects of the slider, upper stop and lower stop of the zipper through a first detection lens, and includes a slider positioning device, a slider detection device and a zipper positioning and adjusting device arranged in sequence along the zipper conveying direction. The position of the slider positioning device is adjustable relative to the slider detection device and is used to match and adjust the distance between the slider and the upper stop of the next zipper. The position of the zipper positioning and adjusting device is adjustable relative to the slider detection device and is used to match zippers of different lengths so that the slider, upper stop of the previous zipper and the lower stop of the next zipper are always within the detection range of the first detection lens. The zipper detection part detects tooth missing and tape defects of the zipper through a second detection lens. The cutting part is used to cut and separate the detected zipper. The finished product classification part is used to classify the cut zippers according to the detection results.

[0009] By setting the slider detection part and the zipper detection part, the present invention separately detects the slider, upper stop and lower stop and the tooth missing and tape defects, and takes a short pause for photographing during the detection of the slider, upper stop and lower stop, effectively improving the accuracy and stability of the detection, reducing the misjudgment rate, and having little impact on the detection speed, and the detection speed can reach 10 pieces per second. At the same time, by setting a slider positioning device and a zipper positioning and adjusting device with adjustable positions relative to the slider detection device, the interval between the slider and the upper stop can be adjusted according to different zipper lengths and it is ensured that the slider, upper stop and lower stop to be detected are all within the detection range of the first detection lens, meeting the requirements of separate detection of the slider, upper stop and lower stop and the tooth missing and tape defects of zippers of various different lengths, and reducing the detection misjudgment rate during the detection of zippers of different specifications.

[0010] In one embodiment, the slider positioning device includes two zipper guide wheels, a slider positioning block, and two cylinders. The zipper guide wheels are installed on two opposite sides of the slider positioning block along the advancing direction of the zipper. The zipper is supported by the zipper guide wheels and advances. The cylinders are respectively arranged on both sides in the advancing direction of the zipper and are used to lock the slider during the advancement of the zipper, thereby changing the position of the slider on the zipper. This structure is applicable to the positioning adjustment of ordinary sliders.

[0011] In one embodiment, the slider positioning device includes two zipper guide wheels, a slider positioning block, and one cylinder. The two zipper guide wheels are arranged vertically. The zipper winds around from bottom to top between the two zipper guide wheels. The cylinder is arranged above the upper zipper guide wheel and acts as a slider flipper to drive the slider to move. This structure is applicable to the positioning adjustment that requires the slider to be lifted at an angle before it can slide.

[0012] In one embodiment, the slider positioning block is adjustably installed on a mounting plate. A slider position adjuster is provided corresponding to the slider positioning block. The slider position adjuster is used to lock the slider positioning block in place after adjusting it according to different zipper specifications. The mounting plate can be installed vertically or horizontally.

[0013] In one embodiment, the slider positioning block is fixedly installed on a mounting plate, and the installation position of the mounting plate relative to the slider detection device is adjustable. The mounting plate is installed horizontally.

[0014] In one embodiment, the cylinder is connected to the slider positioning block through a connecting bracket. In this way, when adjusting the slider positioning block, the cylinder can be adjusted together, eliminating the need to adjust the positions of the slider positioning block and the cylinder separately in two steps, making the positioning adjustment more convenient.

[0015] In one embodiment, there are two first detection lenses, which are respectively arranged on the upper side and the lower side of the zipper to be detected; corresponding detection light sources are respectively provided for each of the first detection lenses; to improve the detection accuracy and reduce the misjudgment rate.

[0016] In one embodiment, there are two second detection lenses, which are respectively arranged on the upper side and the lower side of the zipper to be detected; corresponding detection light sources are respectively provided for each of the second detection lenses; to improve the detection accuracy and reduce the misjudgment rate.

[0017] In one embodiment, the cutting part includes an upper cutter and a cushion table.

[0018] In one embodiment, the finished product classification part classifies the cut zippers into qualified products and unqualified products according to the inspection results, and the qualified products are sent to the qualified product area, and the unqualified products are sent to the unqualified product area; the sending method is one of the following: classification and transportation using a bidirectional conveyor belt, classification and transportation using a robot, classification and transportation using wind power, or classification and transportation using a toggle rod.

[0019] Some other beneficial effects of the present invention will become more apparent in the following description or be understood through practice. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG2 is a schematic structural diagram of a zipper visual inspection device provided in Embodiment 1 of the present invention.

[0021] Figure 2 Shown Figure 1 Schematic diagram of the structure of the slider positioning device.

[0022] Figure 3 FIG2 is a schematic structural diagram of a zipper visual inspection device provided in the second embodiment of the present invention.

[0023] Figure 4 FIG. 1 is a schematic structural diagram of a zipper visual inspection device provided in Embodiment 3 of the present invention.

[0024] Figure 5 Shown Figure 4 Schematic diagram of the structure of the slider positioning device.

[0025] Figure 6 Shown is a structural schematic diagram of a zipper visual inspection device provided in Example 4 of the present invention.

[0026] Figure 7 The figure shows a schematic diagram of bidirectional conveyor belt classification and transportation. DETAILED DESCRIPTION

[0027] The following description of the embodiments of the present invention is further described in conjunction with the accompanying drawings to make the technical solutions and beneficial effects of the present invention clearer and more specific. The following description of the embodiments with reference to the accompanying drawings is illustrative and intended to explain the present invention, but is not to be construed as limiting the present invention.

[0028] Additional aspects and advantages of the invention will become apparent from the description which follows, or may be learned by practice of the invention.

[0029] Example 1.

[0030] Reference Figure 1As shown in the figure, a visual inspection device for zippers includes a pull head detection part 1, a zipper detection part 2, a cutting part 3, and a finished product classification part 4 that are connected in sequence. The pull head detection part 1 detects the pull head, upper stop, and lower stop of the zipper through a first detection lens 1-1, and includes a pull head positioning device 1-2, a pull head detection device 1-3, and a zipper positioning and adjusting device 1-4 that are arranged in sequence along the zipper conveying direction. The position of the pull head positioning device 1-2 is adjustable relative to the pull head detection device 1-3 and is used to match and adjust the distance between the pull head 5-1 and the upper stop 5-2 of the next zipper 5. The position of the zipper positioning and adjusting device 1-4 is adjustable relative to the pull head detection device 1-3 and is used to match zippers of different lengths so that the pull head 6-1, upper stop 6-2 of the previous zipper 6, and the lower stop 5-3 of the next zipper 5 are always within the detection range of the first detection lens 1-1. The zipper detection part 2 detects missing teeth and fabric defects of the zipper through a second detection lens 2-1. The cutting part 3 is used to cut and separate the detected zipper. The finished product classification part 4 is used to classify the cut zippers according to the detection results.

[0031] A visual inspection device for zippers provided in this embodiment can adjust the interval between the pull head and the upper stop according to the different lengths of the zippers and ensure that the pull head, upper stop, and lower stop to be detected are all within the detection range of the detection lens by setting the pull head positioning device 1-2 and the zipper positioning and adjusting device 1-4 whose positions are adjustable relative to the pull head detection device 1-3. It can be used for the detection of zippers of various different lengths, reducing the detection misjudgment rate during the detection of zippers of different specifications. At the same time, since the zipper detection part 2 is located behind the pull head detection part 1, when the pull head detection part 1 detects defects in the pull head, upper stop, and / or lower stop, it can also skip the detection of the zipper detection part 2 and directly determine it as a defective product (non-conforming product), which can avoid complicated calculations for detecting missing teeth and fabric defects.

[0032] Combined with Figure 2 As shown in the figure, the pull head positioning device 1-2 includes a zipper guide wheel 1-2-1, a pull head positioning block 1-2-2, and a cylinder 1-2-3. The zipper guide wheel 1-2-1 is installed on two opposite sides of the pull head positioning block 1-2-2 along the zipper traveling direction (arrow direction) and is used to support the zipper to travel. The cylinder 1-2-3 is arranged on both sides of the zipper traveling direction and is used to lock the pull head during the zipper traveling process, thereby changing the position of the pull head on the zipper.

[0033] In this embodiment, the slider positioning block 1-2-2 is adjustably mounted on a vertical mounting plate 1-2-5. A slider positioning adjuster 1-2-4 is provided corresponding to the slider positioning block 1-2-2 so as to lock the slider positioning block 1-2-2 in place after adjustment according to different zipper specifications. In this embodiment, preferably, the slider positioning adjuster 1-2-4 is a locking screw or a locking bolt for locking the slider positioning block 1-2-2 on the vertical mounting plate 1-2-5. Preferably, the cylinder 1-2-3 is connected to the slider positioning block 1-2-2 through a connecting bracket. In this way, when adjusting the slider positioning block 1-2-2, the cylinder 1-2-3 can be adjusted together therewith, without separately adjusting the positions of the slider positioning block 1-2-2 and the cylinder 1-2-3 twice, and the positioning adjustment is more convenient.

[0034] In this embodiment, the zipper positioning adjustment device 1-4 includes a vertical positioning plate 1-4-1 and a positioning guide wheel 1-4-2. The positioning guide wheel 1-4-2 is adjustably mounted on the positioning plate 1-4-1. Specifically, a plurality of positioning mounting holes 1-4-3 are provided on the positioning plate 1-4-1 and distributed along its axial direction. The positioning guide wheel 1-4-2 is position-adjustable by being assembled with different positioning mounting holes 1-4-3. Obviously, those skilled in the art can adopt other position-adjustable structures in existing known or future realizable structural forms according to different actual needs, and are not limited to this embodiment.

[0035] In this embodiment, the zipper detection part 2 preferably has two second detection lenses 2-1, and the two second detection lenses 2-1 are respectively arranged on the upper side and the lower side of the zipper to be detected, so that missing teeth and fabric defects can be identified more accurately, the detection is more accurate, and the misjudgment rate is reduced. Further, to improve the image acquisition effect, preferably, corresponding to the first detection lens 1-1 and the second detection lens 2-1, corresponding detection light sources are also provided respectively. As for the types, shapes and installation methods of the detection light sources, they are all common technical knowledge mastered by those skilled in the art and will not be elaborated here.

[0036] In this embodiment, the cutting part 3 includes an upper cutter and a cushion table, and the cutting speed is fast and the efficiency is high. Obviously, those skilled in the art can also adopt other cutting mechanisms in existing known or future realizable structural forms according to different actual needs, as long as the purpose of cutting and separating the detected zipper can be achieved.

[0037] In this embodiment, the finished product classification part 4 classifies the cut zippers into qualified products and unqualified products according to the inspection results, and the qualified products are sent to the qualified product area, and the unqualified products are sent to the unqualified product area; the specific sending method can be classification and transportation using a bidirectional conveyor belt, classification and transportation using a robot, classification and transportation using wind power, or classification and transportation using a toggle rod, etc., which can be selected by technical personnel in this field as needed.

[0038] like Figure 7 As shown, this is a bidirectional conveyor belt sorting and transporting method, comprising an upper conveyor belt 7-1 and a lower conveyor belt 7-2 assembled together. The upper conveyor belt 7-1 runs forward and reverse under the drive of a first motor 7-3, while the lower conveyor belt 7-2 runs unidirectionally under the drive of a second motor 7-4. During operation, the cut zipper first enters the upper conveyor belt 7-1. If the cut zipper is determined to be qualified based on the test results, the upper conveyor belt 7-1 is controlled to reverse and transport the corresponding zipper to the qualified product area. If the cut zipper is determined to be unqualified based on the test results, the upper conveyor belt 7-1 is controlled to rotate forward and transport the corresponding zipper to the lower conveyor belt 7-2, which then transports the corresponding zipper to the unqualified product area through the lower conveyor belt 7-2. The double-layer, bidirectional conveyor belt sorting and transporting method achieves better sorting results and can meet the sorting requirements of zippers of various lengths.

[0039] The specific working principle of the above-mentioned zipper visual inspection device is as follows: 1) The long zipper to be inspected is driven by the zipper tightening device to move along the Figure 1 The zipper is transported in the direction of the middle arrow. During the transportation of the long zipper, the cylinder rod of the cylinder 1-2-3 of the slider positioning device 1-2 extends out to press against the slider and then drives the slider to slide to close the chain; when the slider 6-1, the top stop 6-2 of the previous zipper 6 and the bottom stop 5-3 of the next zipper 5 are within the detection range of the first detection lens 1-1, the zipper tightening device stops running, and the first detection lens 1-1 collects images of the slider 6-1, the top stop 6-2 of the previous zipper 6 and the bottom stop 5-3 of the next zipper 5 to perform defect detection on the slider, the top stop and the bottom stop; at the same time, the cutting part 3 cuts off and separates the zipper that has been inspected; and the slider 5-1 of the next zipper 5 has been moved close to the top stop 5-2 of the next zipper 5 under the drive of the cylinder 1-2-3, and the cylinder rod of the cylinder 1-2-3 retracts to release the slider. 2) After the first detection lens 1-1 captures the images of the slider 6-1, the top stop 6-2 of the previous zipper 6 and the bottom stop 5-3 of the next zipper 5, the zipper tightening device continues to drive the long zipper along the Figure 1The zipper is transported in the direction of the middle arrow. After the slider passes through, the cylinder rods of cylinders 1-2-3 extend to press against the next slider to close the chain, until the slider 5-1 of the next zipper 5 moves below the first inspection lens 1-1 and stops. The slider, top stop, and bottom stop of each zipper are inspected in sequence. It should be noted that, depending on actual needs, clamping blocks that cooperate with the slider can be installed on the cylinder rods of cylinders 1-2-3 to provide better clamping and positioning.

[0040] After completing the slider inspection, the zipper enters the zipper inspection part 2 and is inspected for missing teeth and tape defects through the second inspection lens 2-1.

[0041] After completing the detection of missing teeth and tape defects, the zipper enters the cutting part 3 to cut off the inspected zipper. The cut zipper is classified into the qualified product collection area or the unqualified product collection area under the action of the finished product classification part 4 according to the detection results of the slider detection part 1 and the zipper detection part 2.

[0042] Example 2.

[0043] Reference Figure 3 The figure shows a zipper visual inspection device that is essentially the same as Example 1, except that the mounting plate 1-2-5 is now positioned horizontally. This allows the zipper to better contact the zipper guide wheel 1-2-1, but this also results in a longer inspection line.

[0044] Example 3.

[0045] Reference Figure 4 、 Figure 5 The figure shows a zipper visual inspection device that is essentially the same as Example 1, with the following differences: 1. The mounting plate 1-2-5 is now positioned horizontally, the position of the slider positioning block 1-2-2 relative to the mounting plate 1-2-5 is fixed, and the mounting position of the mounting plate 1-2-5 relative to the slider detection device 1-3 is adjustable. A common method of adjustable mounting position is to use a slide rail and screw or bolt locking.

[0046] Second, the structure of the slider positioning device 1-2 is different. Specifically, two zipper guide wheels 1-2-1 are arranged one above the other, with the zipper weaving between them from bottom to top. A cylinder 1-2-3 is located above the upper zipper guide wheel 1-2-1, acting as a slider flipper. This structure is particularly suitable for sliders that require the slider to be raised at an angle before they can be pulled.

[0047] Example 4.

[0048] Reference Figure 6As shown, a visual inspection device for zippers is basically the same as that in Embodiment 1, except that: there are two first detection lenses 1-1, which are respectively arranged on the upper side and the lower side of the zipper to be detected. In this way, the defect detection of the slider, the upper stop and the lower stop is more accurate, and the misjudgment is reduced.

[0049] It should be noted that in the visual inspection device for zippers provided by the present invention, the specific settings of the control system and the control program are common technical knowledge mastered by those skilled in the art and are not the innovative points of the present invention, so no detailed introduction is made in the present invention.

[0050] Through the description of the above structure and principle, those skilled in the art should understand that the present invention is not limited to the above specific embodiments. The improvements and substitutions using the well-known technologies in the art on the basis of the present invention all fall within the protection scope of the present invention, and the protection scope of the present invention should be defined by each claim item and its equivalent. The parts not described in the specific embodiments are all prior art or common general knowledge.

Claims

1. A zipper visual inspection device, characterized in that, It includes a slider detection part (1), a zipper detection part (2), a cutting part (3), and a finished product classification part (4) connected in sequence; the slider detection part (1) detects defects of the slider, top stop, and bottom stop of the zipper through a first detection lens (1-1), and includes a slider positioning device (1-2), a slider detection device (1-3), and a zipper positioning and adjusting device (1-4) arranged in sequence along the zipper conveying direction. The position of the slider positioning device (1-2) is adjustable relative to the slider detection device (1-3) and is used to match and adjust the distance between the slider (5-1) and the top stop (5-2) of the next zipper (5). The position of the zipper positioning and adjusting device (1-4) is adjustable relative to the slider detection device (1-3) and is used to match zippers of different lengths so that the slider (6-1), top stop (6-2) of the previous zipper (6), and bottom stop (5-3) of the next zipper (5) are always within the detection range of the first detection lens (1-1); the zipper detection part (2) detects missing teeth and tape defects of the zipper through a second detection lens (2-1); the cutting part (3) is used to cut and separate the detected zipper; the finished product classification part (4) is used to classify the cut zippers according to the detection results.

2. The visual inspection device for a zipper according to claim 1, wherein The slider positioning device (1-2) includes two zipper guide wheels (1-2-1), a slider positioning block (1-2-2), and two cylinders (1-2-3). The zipper guide wheels (1-2-1) are installed on two opposite sides of the slider positioning block (1-2-2) along the zipper traveling direction, and the zipper is supported by the zipper guide wheels (1-2-1) to travel. The cylinders (1-2-3) are respectively arranged on both sides in the zipper traveling direction and are used to lock the slider during the zipper traveling process, thereby changing the position of the slider on the zipper.

3. The visual inspection device for a zipper according to claim 1, characterized in that, The slider positioning device (1-2) includes two zipper guide wheels (1-2-1), a slider positioning block (1-2-2), and a cylinder (1-2-3). The two zipper guide wheels (1-2-1) are arranged vertically. The zipper winds around from bottom to top between the two zipper guide wheels (1-2-1). The cylinder (1-2-3) is arranged above the upper zipper guide wheel (1-2-1) and acts as a slider flipper to drive the slider to move.

4. A zipper visual inspection device according to claim 2 or 3, characterized in that, The slider positioning block (1-2-2) is installed on a mounting plate (1-2-5) with adjustable position. A slider positioning adjuster (1-2-4) is provided corresponding to the slider positioning block (1-2-2), and the slider positioning adjuster (1-2-4) is used to lock the slider positioning block (1-2-2) in place after adjusting it according to different zipper specifications.

5. The visual inspection device for a zipper according to claim 4, wherein, The mounting plate (1-2-5) is installed vertically or horizontally.

6. A zipper vision detection device according to claim 2 or 3, characterized in that, The slider positioning block (1-2-2) is fixedly installed on a mounting plate (1-2-5), and the mounting position of the mounting plate (1-2-5) relative to the slider detection device (1-3) is adjustable.

7. A zipper vision detection device according to claim 2 or 3, characterized in that, The air cylinder (1-2-3) is connected to the slider positioning block (1-2-2) via a connecting bracket, and when the position of the slider positioning block (1-2-2) is adjusted, the air cylinder (1-2-3) is adjusted accordingly.

8. The visual inspection device for a zipper according to claim 1, characterized in that, There are two first detection lenses (1-1), which are respectively arranged on the upper side and the lower side of the zipper to be detected; and corresponding detection light sources are respectively provided for each of the first detection lenses (1-1).

9. The visual inspection device for a zipper according to claim 1, wherein, There are two second detection lenses (2-1), and the two second detection lenses (2-1) are respectively arranged on the upper side and the lower side of the zipper to be detected; and corresponding detection light sources are respectively provided for each second detection lens (2-1).

10. A zipper vision inspection device according to claim 1, characterized in that, The cutting part (3) includes an upper cutter and a pad; the finished product classification part (4) classifies the cut zippers into qualified products and unqualified products according to the test results, and the qualified products are sent to the qualified product area, and the unqualified products are sent to the unqualified product area; the sending method is one of using a bidirectional conveyor belt for classification and transportation, using a robot for classification and transportation, using wind power for classification and transportation, or using a toggle lever for classification and transportation.

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