Drawing type towel on-line quality detection device

Abstract

The utility model provides a drawing type towel on-line quality detection device which comprises an electric control machine base and a conveying mechanism, the conveying mechanism is located at the front end of the electric control machine base, the lower ends of the conveying mechanism and the electric control machine base are fixedly connected through a supporting base, a detection mechanism and a guide mechanism are arranged on the conveying mechanism, and the conveying mechanism comprises a damping base, a positioning side plate, a bearing plate and a conveying belt module. The conveying belt modules are arranged on the two sides of the bearing plate respectively and fixed through the positioning side plates, the detection mechanism comprises an image acquisition module and a thickness detection module, the image acquisition module is arranged in the middle of the conveying mechanism, and the guide mechanism and the thickness detection module are distributed on the two sides of the image acquisition module. The utility model has the beneficial effects that the appearance and the thickness of the towel can be detected by arranging the image acquisition device and the thickness detection device, so that the quality of the towel is ensured to meet the requirement; by arranging the dovetail groove sliding table, the detection position can be adjusted according to the thicknesses of towels of different specifications, and the applicability of the device is improved.

Description

Technical Field

[0001] This utility model mainly relates to the field of pull-out towel production technology, specifically to an online quality inspection device for pull-out towels. Background Technology

[0002] Pull-out towels, as a daily necessity combining convenience and practicality, are widely used in homes, hotels, medical institutions, and public places. Their typical structure consists of multiple towels connected by point breaks or individually packaged to form a continuously pull-out roll or stacked product. The core advantages of this type of product lie in the hygiene of individual pull-out towels, the convenience of storage, and the controllability of use. Therefore, stringent requirements are placed on indicators such as dimensional accuracy, appearance integrity, and material uniformity during the production process. Specifically, parameters such as the density of the loops, color consistency, edge stitching strength, and thickness uniformity directly affect the user experience and product reliability. For example, missing loops will lead to decreased absorbency, uneven thickness may cause breakage, while stains or holes are serious appearance defects.

[0003] During the actual implementation process, the inventors discovered the following defects:

[0004] Traditional quality inspection of pull-out towels mainly relies on manual visual inspection and offline sampling, which has significant problems of low efficiency and blind spots. Manual inspection is limited by the ability of the naked eye to distinguish details, making it difficult to capture subtle defects. Moreover, long working hours can easily lead to visual fatigue and missed defects. Offline sampling inspection suffers from insufficient sample randomness and long inspection cycles, which cannot meet the high-speed operation requirements of production lines. In addition, existing automated inspection equipment is mostly designed for single indicators, such as only having thickness detection or appearance photography functions, lacking the ability to link and analyze multi-dimensional inspection data, and is difficult to adapt to the flexibility inspection requirements of pull-out towels of different specifications. At the same time, the mechanical structure of traditional equipment generally has problems such as inconvenient adjustment and fixed inspection positions. When changing product models, it is necessary to stop the machine for a large number of parameter calibrations, resulting in a decrease in the overall utilization rate of the production line.

[0005] It should be noted that the above content falls within the scope of the inventor's technical knowledge. Due to the vast and complex nature of the technical content in this field, the above content of this application does not necessarily constitute prior art. Utility Model Content

[0006] 1. The technical problem to be solved by the utility model:

[0007] This utility model provides a pull-out towel online quality inspection device to solve the technical problems existing in the background art.

[0008] 2. Technical Solution:

[0009] To achieve the above objectives, the technical solution provided by this utility model is as follows: an online quality inspection device for pull-out towels, comprising an electrical control base and a conveying mechanism. The conveying mechanism is located at the front end of the electrical control base, and the lower ends of the two are fixedly connected by a support base. The conveying mechanism is provided with a detection mechanism and a guiding mechanism. The conveying mechanism includes a shock-absorbing seat, a positioning side plate, a bearing plate, and a conveyor belt module. The conveyor belt module is respectively disposed on both sides of the bearing plate and fixed by the positioning side plate. The lower end of the bearing plate is fixedly connected to the shock-absorbing seat by a bracket. The detection mechanism includes an image acquisition module and a thickness detection module. The image acquisition module is disposed in the middle of the conveying mechanism, and the guiding mechanism and the thickness detection module are distributed on both sides of the image acquisition module.

[0010] Furthermore, the conveyor belt module includes a feeding section, a detection section, and a discharging section, and the guiding mechanism, the image acquisition module, and the thickness detection module are respectively provided for the feeding section, the detection section, and the discharging section.

[0011] Furthermore, a viewing window is provided on the support plate at the position corresponding to the detection section, and the viewing window is covered with a glass panel. The height of the upper end surface of the support plate is less than the height of the upper end surface of the conveyor belt module.

[0012] Furthermore, the image acquisition module includes an upper visual detection module and a lower visual detection module respectively disposed at the upper and lower ends of the viewing window. Both the upper visual detection module and the lower visual detection module are composed of a detection camera and a detection light source. The lower visual detection module is embedded in the conveying mechanism, and the upper visual detection module is fixed above the viewing window by a universal bracket.

[0013] Furthermore, the thickness detection module includes two sets of detection roller assemblies. The two ends of the detection roller assemblies are connected to the dovetail slide table via a mounting bracket. Pressure sensors are also provided at both ends of the detection roller assemblies.

[0014] Furthermore, the detection roller assembly includes a pressure roller and a micro motor. The pressure roller is mounted above the conveyor belt module and contacts the upper surface of the support plate.

[0015] 3. Beneficial effects:

[0016] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0017] This invention enables online quality inspection of pull-out towels by setting up a conveying mechanism, a detection mechanism, and a control system, thereby improving inspection efficiency and accuracy. By setting up an image acquisition device and a thickness detection device, the appearance and thickness of the towels can be inspected to ensure that the quality of the towels meets the requirements. By setting up a dovetail groove slide, the detection position can be adjusted according to the thickness of towels of different specifications, thereby improving the applicability of the device.

[0018] It should be noted that the structures not described in this utility model are the same as or can be implemented using existing technology, and will not be elaborated here, as they do not involve the design points and improvement directions of this utility model. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of this utility model from another angle;

[0021] Figure 3 This is a schematic diagram of the conveying mechanism structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the thickness detection module structure of this utility model.

[0023] Figure label:

[0024] 1. Electrical control base; 2. Conveying mechanism; 201. Shock absorber seat; 202. Positioning side plate; 203. Bearing plate; 2031. Viewing window; 204. Conveyor belt module; 3. Support base; 4. Detection mechanism; 401. Image acquisition module; 4011. Upper vision detection module; 4012. Lower vision detection module; 4013. Universal bracket; 402. Thickness detection module; 4021. Detection roller assembly; 4022. Mounting bracket; 4023. Dovetail groove slide; 4024. Pressure sensor; 5. Guiding mechanism. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," "provided with," and "located in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example

[0029] See attached document Figure 1-4 A pull-out towel online quality inspection device includes an electrical control base 1 and a conveying mechanism 2. The conveying mechanism 2 is located at the front end of the electrical control base 1, and the lower ends of the two are fixedly connected by a support base 3. The conveying mechanism 2 is provided with a detection mechanism 4 and a guiding mechanism 5. The conveying mechanism 2 includes a shock-absorbing seat 201, a positioning side plate 202, a bearing plate 203, and a conveyor belt module 204. The conveyor belt module 204 is respectively disposed on both sides of the bearing plate 203 and fixed by the positioning side plate 202. The lower end of the bearing plate 203 is fixedly connected to the shock-absorbing seat 201 by a bracket. The detection mechanism 4 includes an image acquisition module 401 and a thickness detection module 402. The image acquisition module 401 is disposed in the middle position of the conveying mechanism 2, and the guiding mechanism 5 and the thickness detection module 402 are distributed on both sides of the image acquisition module 401.

[0030] In this embodiment, the main structure consists of an electric control base 1 and a conveying mechanism 2. The conveying mechanism 2 is rigidly connected to the front end of the electric control base 1 via a support base 3 at its bottom. The support base 3 is fixed by a bolt group through to ensure that the two main structures maintain a stable relative position during high-speed operation. The conveying mechanism 2 integrates a shock-absorbing seat 201, the upper end of which is bolted to the bottom surface of the bearing plate 203 via an adjustable bracket. A rubber shock-absorbing pad is set in the middle of the bracket, which can effectively absorb the vibration generated by the conveyor belt module 204 during operation. The conveyor belt module 204 is set on both sides of the bearing plate 203 and is slightly lower than the conveyor belt module 2. 04. The two sides of the pull-out towel are continuously conveyed by the conveyor belt module 204. The outer side of the conveyor belt module 204 is supported by the positioning side plate 202. The detection mechanism 4 is set on the conveying mechanism 2. The detection mechanism 4 includes an image acquisition module 401 and a thickness detection module 402. The guide mechanism 5, the image acquisition module 401 and the thickness detection module 402 are respectively installed in the left, middle and right positions of the conveying mechanism 2, forming a linear layout of "left guidance - middle appearance measurement - right thickness measurement", ensuring that the towel completes the guidance and positioning, appearance inspection and thickness inspection processes in sequence during the conveying process.

[0031] The conveyor belt module 204 adopts a segmented design, divided into a feeding section, an inspection section, and an unloading section along the towel conveying direction. The feeding section corresponds to the area of ​​the guide mechanism 5. The inspection section is located directly below the image acquisition module 401. The belt is made of transparent PVC material to avoid obstructing the visual inspection below. The unloading section connects to the subsequent packaging process. The belt speed is 20% higher than that of the inspection section, creating a speed difference to achieve rapid diversion of qualified products. The guide mechanism 5 is connected to the carrier plate 203 through a height-adjustable telescopic rod, which can accommodate towels of different specifications with thicknesses of 5-30mm. The image acquisition module 401 coincides with the central axis of the inspection section to ensure that the inspection area covers the full width of the towel. The thickness detection module 402 is set at the beginning of the unloading section to perform a final thickness check on the inspected towels.

[0032] The support plate 203 has a rectangular viewing window 2031 at the detection section position, which is covered with a high-strength tempered glass panel. The glass and the edge of the support plate 203 are sealed with a silicone sealing ring to prevent dust from entering and affecting the detection accuracy. The upper surface of the glass panel is flush with the upper surface of the conveyor belt module 204, forming a stepless transition surface to ensure that the towel passes through without jamming. Metal reinforcing ribs are embedded inside the support plate 203 in the area corresponding to the viewing window 2031 to improve the local structural strength and avoid panel deformation caused by long-term operation.

[0033] The image acquisition module 401 adopts a dual-view detection scheme: the upper vision detection module 4011 is connected to the panel of the electrical control base 1 at the rear of the support plate 203 via a universal bracket 4013. The bracket can achieve horizontal rotation and pitch adjustment to adapt to the detection of towels with different pile heights. The lower vision detection module 4012 is embedded inside the support plate 203 and fixed by a recessed mounting slot. The lens is 10mm away from the bottom surface of the viewing window 2031 glass to avoid mechanical interference with the conveyor belt module 204. Both modules are equipped with a 12-megapixel industrial camera and a ring LED detection light source with a wavelength of 550nm, which can effectively highlight the loop defects and color differences on the surface of the towel. The upper module light source can be tilted at 30° to enhance the three-dimensionality of the pile, while the lower module uses parallel light illumination to highlight the defects in the weave pattern on the bottom surface. The universal bracket 4013 has a built-in locking knob, which can fix the detection angle after adjustment to ensure positional consistency during repeated detection.

[0034] The thickness detection module 402 includes two symmetrically arranged detection roller assemblies 4021. Each assembly is connected to a dovetail slide 4023 via mounting brackets 4022 at both ends. The dovetail slide 4023 is set along the length of the support plate 203 and its height is adjusted by a handwheel-driven screw to accommodate towels of different thicknesses. The pressure rollers of the detection roller assembly 4021 are made of aluminum alloy with a hard chrome plating finish. Miniature pressure sensors 4024 with an accuracy of 0.1N are installed at both ends of the roller body to collect the pressure value when the towel passes through in real time. A micro motor (not shown) drives the pressure rollers to rotate via a synchronous belt, and the rotation speed is consistent with that of the conveyor belt module 204 to eliminate the influence of friction on the detection data.

[0035] The specific operating steps are as follows:

[0036] During the feeding and guiding stage, the pull-out towels are placed manually or by a robotic arm on the feeding section of the conveyor belt module 204. The guide rollers of the guide mechanism 5 lift the pull-out towels to fit the carrier plate 203 for conveying, and automatically correct the towel conveying posture to ensure that the center line of the towel is parallel to the belt transmission direction.

[0037] During the appearance image inspection stage, after the towel enters the inspection section, the conveyor belt module 204 decelerates to a constant speed of 0.5m / s. The detection light sources of the upper vision inspection module 4011 and the lower vision inspection module 4012 are lit synchronously. The industrial camera acquires images of both sides of the towel at a speed of 200 frames per second and transmits them in real time to the processor in the electrical control base 1 via a gigabit network cable. The system automatically identifies appearance defects such as missing loops, stains, and holes.

[0038] After completing the appearance inspection during the real-time thickness detection stage, the towel continues to be conveyed to the beginning of the unloading section and enters the detection range of the thickness detection module 402. It passes through two sets of detection roller assemblies 4021 to achieve precise detection. The pressure rollers of the thickness detection module 402 rotate synchronously under the drive of a micro motor. The pressure sensor 4024 collects contact pressure data in real time. The processor calculates the thickness value of the towel at the current position according to the pressure-thickness mathematical model, with a detection accuracy of ±0.05mm.

[0039] In the data processing and sorting stage, the processor comprehensively judges the appearance image and thickness data: the inspection results are displayed simultaneously on the touch screen of the electric control base 1, and a quality inspection report is generated, which includes information such as defect type, location, and batch, for the production management system to call. After inspection, the products enter the next sorting process. Qualified products are output to the packaging station by conveyor belt; unqualified products enter the waste collection box.

[0040] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A pull-out towel online quality inspection device, comprising an electrical control base (1) and a conveying mechanism (2), characterized in that: The conveying mechanism (2) is located at the front end of the electrical control base (1), and the lower ends of the two are fixedly connected by a support base (3). The conveying mechanism (2) is provided with a detection mechanism (4) and a guiding mechanism (5). The conveying mechanism (2) includes a shock absorber (201), a positioning side plate (202), a bearing plate (203), and a conveyor belt module (204). The conveyor belt module (204) is respectively set on both sides of the bearing plate (203) and fixed by the positioning side plate (202). The lower end of the bearing plate (203) is fixedly connected to the shock absorber (201) by a bracket. The detection mechanism (4) includes an image acquisition module (401) and a thickness detection module (402). The image acquisition module (401) is set in the middle position of the conveying mechanism (2). The guiding mechanism (5) and the thickness detection module (402) are distributed on both sides of the image acquisition module (401).

2. The online quality inspection device for pull-out towels according to claim 1, characterized in that: The conveyor belt module (204) includes a feeding section, a detection section and a discharging section. The guiding mechanism (5), the image acquisition module (401) and the thickness detection module (402) are respectively set for the feeding section, the detection section and the discharging section.

3. The online quality inspection device for pull-out towels according to claim 2, characterized in that: The support plate (203) has a viewing window (2031) at the position corresponding to the detection section. The viewing window (2031) is covered with a glass panel. The height of the upper surface of the support plate (203) is less than the height of the upper surface of the conveyor belt module (204).

4. The online quality inspection device for pull-out towels according to claim 3, characterized in that: The image acquisition module (401) includes an upper visual detection module (4011) and a lower visual detection module (4012) respectively disposed at the upper and lower ends of the viewing window (2031). The upper visual detection module (4011) and the lower visual detection module (4012) are both composed of a detection camera and a detection light source. The lower visual detection module (4012) is embedded in the conveying mechanism (2). The upper visual detection module (4011) is fixed above the viewing window (2031) by a universal bracket (4013).

5. The online quality inspection device for pull-out towels according to claim 1, characterized in that: The thickness detection module (402) includes two sets of detection roller assemblies (4021). The two ends of the detection roller assembly (4021) are connected to the dovetail slide (4023) through the mounting bracket (4022). Pressure sensors (4024) are also provided at both ends of the detection roller assembly (4021).

6. The online quality inspection device for pull-out towels according to claim 5, characterized in that: The detection roller assembly (4021) includes a pressure roller and a micro motor. The pressure roller is mounted above the conveyor belt module (204) and contacts the upper surface of the support plate (203).

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