Simple aluminum cap gasket missing detection device

Abstract

The utility model relates to a simple and easy aluminium cover washer loss detection equipment, including holding device, holding device includes the installation base, is installed on the installation base and has the rotating device, is installed on the rotating device and has the calibration subassembly, still is installed on the installation base and has the distance detection device, and one side of holding device is installed with visual detection device, the rotating device includes with the motor assembly that installation base links, and the drive shaft of motor assembly is installed with calibration subassembly, visual detection device includes the bearing support, and is installed with detection camera on the bearing support, and the viewfinder area of detection camera corresponds with the position of calibration subassembly. Thus, can realize the centralized assembly, and the option of all kinds of detection workbench is adapted. The herringbone structure of calibration subassembly can ensure that medicine pipe and drive shaft are coaxial positioning, and the positioning detection demand of adaptation different medicine pipe.

Description

Technical Field

[0001] This utility model relates to a measuring device, and more particularly to a simple aluminum cap gasket missing detection device. Background Technology

[0002] In the pharmaceutical packaging production process, the missing gasket after the aluminum cap and the drug tube are riveted together will directly affect the product's sealing performance and safety. Therefore, there is an urgent need for efficient and accurate testing equipment to achieve quality control.

[0003] In existing technologies, the inspection of aluminum caps and medicine tubes after riveting largely relies on manual visual inspection, which is not only inefficient but also prone to misjudgment due to fatigue leading to missing gaskets. While some technologies employ inspection equipment, which works by detecting the height of the aluminum cap gasket using a displacement sensor, this equipment primarily targets the gasket inspection of individual aluminum caps and does not address the integrated inspection of the riveted aluminum cap and medicine tube. Furthermore, it lacks the function of simultaneously detecting the length parameter of the medicine tube, making it difficult to meet the comprehensive quality assessment requirements of the riveted finished product.

[0004] Furthermore, other inspection equipment focuses only on single defect detection, or lacks sufficient stability in its positioning structure, making it prone to misjudgment due to deviations in the inspection angle or workpiece tilt. Additionally, it cannot combine visual inspection with the coordinated operation of end-face notch positioning and length measurement.

[0005] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a simple aluminum cap gasket missing detection device, making it more valuable for industrial use. Utility Model Content

[0006] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a simple aluminum cap gasket missing detection device.

[0007] This utility model discloses a simple aluminum cap gasket missing detection device, comprising a holding device, wherein: the holding device includes a mounting base, a rotating device mounted on the mounting base, a calibration component mounted on the rotating device, a distance detection device mounted on the mounting base, and a visual inspection device mounted on one side of the holding device; the rotating device includes a motor assembly connected to the mounting base, and the calibration component is mounted on the drive shaft of the motor assembly; the visual inspection device includes a support bracket, and a detection camera is mounted on the support bracket, the field of view of the detection camera corresponding to the position of the calibration component; a control device is mounted on the holding device, and the control device is electrically connected to the motor assembly, the distance detection device, and the detection camera.

[0008] Furthermore, in the aforementioned simple aluminum cap gasket missing detection device, the holding device is a hollow bracket, a holding plate is installed on the hollow bracket, a pre-drilled mounting hole is provided on the holding plate, and a motor assembly is connected to the pre-drilled mounting hole; a limit block extends from the outside of the power supply assembly, and the limit block is located at the upper end of the holding plate.

[0009] Furthermore, in the aforementioned simple aluminum cap gasket missing detection device, a buffer pad is placed between the limiting block and the holding plate.

[0010] Furthermore, in the aforementioned simple aluminum cap gasket missing detection device, the motor assembly is a servo motor, and a reducer is installed on the servo motor.

[0011] Furthermore, in the aforementioned simple aluminum cap gasket missing detection device, the distance detection device includes a lifting bracket connected to the mounting base, a tilt adjustment block installed on the lifting bracket, an arc adjustment groove provided on the tilt adjustment block, an adjustment screw installed on the arc adjustment groove, and the adjustment screw connected to the lifting bracket; a distance sensor is installed on the tilt adjustment block.

[0012] Furthermore, in the aforementioned simple aluminum cap gasket missing detection device, the distance sensor is a laser sensor or an infrared sensor; and the arc adjustment groove is marked with an angle scale.

[0013] Furthermore, in the aforementioned simple aluminum cap gasket missing detection device, a transverse support block is installed on the lifting bracket, and a translation adjustment block is connected to the transverse support block via adjusting bolts. The tilt adjustment block is connected to the translation adjustment block.

[0014] Furthermore, in the aforementioned simple aluminum cap gasket missing detection device, the calibration component is a herringbone-shaped calibration block, the lower end of which is connected to the drive shaft of the motor assembly; the upper end of the herringbone-shaped calibration block is provided with mating strips; and a bubble level tube is installed on the calibration component.

[0015] Furthermore, in the aforementioned simple aluminum cap gasket missing detection device, the control device is a PLC controller or an industrial control computer.

[0016] Furthermore, in the aforementioned simple aluminum cap gasket missing detection device, a replaceable filter assembly is installed on the lens of the detection camera; the visual inspection device also includes a ring light source, which is installed on the outer periphery of the lens of the detection camera, and the ring light source is connected to a light source controller.

[0017] By means of the above solution, this utility model has at least the following advantages: 1. Utilizing an independent holding device, centralized assembly is possible, adaptable to various testing workbenches. The rigid connection between the servo motor and reducer in the rotating device, the limitation of radial motor wobble by the limit block, and the vibration absorption by the buffer pad effectively ensure stable motor operation. The herringbone structure of the calibration component ensures coaxial positioning of the medicine tube and the drive shaft. Combined with the bubble level tube for leveling, it avoids testing errors caused by positioning or leveling issues, adapting to the positioning and testing needs of different medicine tubes.

[0018] 2. The distance detection device employs multiple adjustable components, enabling precise detection of distance changes in the position of the inner gasket of the aluminum cap, thus accurately determining gasket defects. Simultaneously, the vision inspection device, relying on an industrial camera, switchable filters, and a ring light source, supplemented by closed-loop angle control of a servo motor, can accurately identify notches on the end face of the medicine tube and calculate the actual length. Combined with pre-stored calibration block height data, the final length is derived, ensuring accurate determination of gasket defects.

[0019] 3. The control device achieves coordinated control of the rotating device, distance detection device and vision inspection device through bus communication, which can automate the inspection process.

[0020] 4. Easy to use, enabling quick completion of single tests. Furthermore, the herringbone-shaped calibration block's connecting strips can straighten potentially bent medicine tubes, further enhancing the equipment's applicability in actual production scenarios and meeting the production needs for batch detection of missing aluminum cap gaskets and length issues in medicine tubes.

[0021] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a simple aluminum cap gasket missing detection device.

[0023] Figure 2 This is a structural diagram of the holding device and the distance detection device.

[0024] Figure 3 This is a schematic diagram of the structure of a vision inspection device.

[0025] The meanings of the labels in the figures are as follows.

[0026] Detailed Implementation The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0027] like Figures 1 to 3 This simple aluminum cap gasket missing detection device includes a holding device, which is unique in that: the holding device includes a mounting base 1, a rotating device 2 mounted on the mounting base 1, and a calibration component 5 mounted on the rotating device 2. A distance detection device 3 is also mounted on the mounting base 1, and a visual inspection device 4 is mounted on one side of the holding device. Furthermore, a control device (not shown in the figure) is mounted on the holding device, which is electrically connected to the rotating device 2, the distance detection device 3, and the visual inspection device 4 to coordinate the operation of each device. Specifically, the holding device is a hollow support frame, which can be welded from square steel profiles. It is lightweight yet has a strong load-bearing capacity, and has adjustable feet at the bottom to adapt to uneven ground. A holding plate 8, which can be made of 3mm thick stainless steel plate, is mounted on the hollow support frame and fixed to the horizontal beam of the hollow support frame with countersunk bolts. Furthermore, considering the stable positioning of the motor assembly, a pre-drilled mounting hole is provided on the holding plate 8, through which the motor assembly of the rotating device 2 is connected. During implementation, an externally extending limiting block 9 of the motor assembly is located at the upper end of the holding plate 8. The limiting block 9 is a ring structure with an inner diameter that fits the outer shell of the motor assembly, limiting radial wobble during motor operation. Furthermore, a buffer pad (not shown in the figure) is placed between the limiting block 9 and the holding plate 8. The buffer pad is a 5mm thick silicone pad with anti-slip texture, absorbing motor vibration and enhancing motor stability. For ease of implementation, the rotating device 2 includes a motor assembly connected to the mounting base 1, preferably a servo motor, on which a reducer (not shown in the figure) is mounted. During assembly, the servo motor has a rated speed of 3000 r / min and is rigidly connected to the input end of the planetary reducer via a flange. The reducer has a reduction ratio of 1:50, and its output end is connected to the drive shaft via a flexible coupling, ensuring smooth and shock-free transmission. Furthermore, to facilitate the installation and positioning of the riveted medicine tubes, a calibration component 5 is installed on the drive shaft of the motor assembly. In this way, by using a servo motor in conjunction with a reducer, the angle control of the drive shaft with an accuracy of 0.1° can be achieved, which can meet the different positioning and detection needs of the gaps in the riveted medicine tube.

[0028] In a preferred embodiment of this invention, the calibration component 5 is a herringbone-shaped calibration block, the lower end of which is connected to the drive shaft of the motor assembly. The connection method is a flat key with a set screw, and the keyway depth is 2mm to ensure reliable torque transmission. Simultaneously, the upper end of the herringbone-shaped calibration block has connecting strips 13. When the medicine tube is inserted, the strips ensure that the tube axis is coaxial with the drive shaft of the motor assembly. Furthermore, a bubble level tube (not shown in the figure) can be installed on the calibration component 5. This bubble level tube is a 20mm long cylindrical level, embedded in a groove on the top or side of the herringbone-shaped calibration block, used to calibrate the levelness of the calibration block and avoid length measurement errors caused by tilting.

[0029] Furthermore, the distance detection device 3 includes a lifting bracket 10 connected to the mounting base 1. During manufacturing, the lifting bracket 10 is an L-shaped steel plate, fixed to the oblong hole on the side of the mounting base 1 with M8 bolts, and its height can be adjusted up and down within a range of 50-150mm. Simultaneously, a transverse support block 12 is installed on the lifting bracket 10, and the transverse support block 12 is connected to a translation adjustment block via adjusting bolts. The adjusting bolts can be M6 fine-thread bolts, which pass through the threaded hole of the transverse support block 12 and are rotatably connected to the bearing seat of the translation adjustment block. Rotating the bolts can drive the translation adjustment block to move within a transverse range of ±20mm, achieving fine adjustment of the horizontal position of the distance sensor 15. Furthermore, a tilt adjustment block 11 is connected to the translation adjustment block. The tilt adjustment block 11 has an arc-shaped adjustment groove, and an adjusting screw is installed on the arc-shaped adjustment groove, which is connected to the translation adjustment block. During implementation, the central angle of the arc adjustment groove is 30° and the radius is 50mm. After loosening the adjusting screw, the tilt adjustment block 11 can rotate around the screw axis. Combined with the 0-30° angle scale marked on the groove, the sensor detection angle can be precisely adjusted. Furthermore, to achieve more accurate detection of potential missing inner gaskets in the aluminum cover, a distance sensor 15 is installed on the tilt adjustment block 11. The distance sensor 15 can be equipped with a laser sensor or an infrared sensor as needed. In this embodiment, a laser displacement sensor is selected, with a detection range of 20-100mm and an accuracy of ±0.01mm. During use, its detection beam is aligned with the inner gasket position of the aluminum cover, and the presence of the gasket is determined by the change in detection distance. When a gasket is present, the detection distance is 2-3mm shorter than when no gasket is present, and the control device identifies the missing gasket accordingly.

[0030] In practical implementation, the visual inspection device 4 includes a support bracket 6, which can be a gantry frame constructed from aluminum profiles. An inspection camera 7 is mounted on the support bracket 6. This inspection camera 7 is a 1.3-megapixel industrial camera, fixed to the guide rail of the support bracket 6 via a slider or corresponding snap-fit ​​assembly, allowing the camera 7 to be moved appropriately and adjusted to a suitable distance from the end face of the drug tube to obtain the optimal shooting position. In other words, after the inspection camera 7 is installed and adjusted, its viewing area corresponds to the position of the calibration component 5, ensuring clear imaging of the end face and top surface of the aluminum cap of the drug tube to be inspected. For different on-site lighting environments and viewing requirements, a replaceable filter assembly 14 can be installed on the lens of the inspection camera 7. Specifically, this replaceable filter assembly 14 is a rotating filter disk containing two wavelength filters: 520nm and 650nm. By switching via a knob, the 520nm filter can enhance the contrast between the notch on the end face of the drug tube and the tube wall. Meanwhile, to avoid shadow obstruction, the visual inspection device 4 also includes a ring light source, which is mounted around the lens of the inspection camera 7. The light source is a white LED ring light, coaxial with the lens, and fixed by a bracket. To provide different lighting effects, a light source controller can also be connected to the ring light source. This light source controller is a rotary dimmer, which can continuously adjust the brightness from 10% to 100%, avoiding end-face reflections caused by strong light.

[0031] Furthermore, the control device is either a PLC controller or an industrial computer. In this embodiment, a PLC controller is preferred, which can be adapted and installed in the electrical box, communicating with the servo motor driver, distance sensor 15, detection camera 7, and light source controller via PROFINET bus. For ease of implementation, a display screen and an alarm device can also be connected to the control device. Specifically, the display screen is a 7-inch touchscreen, showing the detection length, washer status, and the number of qualified / unqualified items in real time; the alarm device is an audible and visual alarm, emitting a 3kHz buzzer and flashing red light when an item is found to be unqualified.

[0032] The working process of this simple aluminum cap gasket missing detection device is as follows: After the medicine tube is riveted to the aluminum cap, the operator manually inserts it into the herringbone calibration block through the mating strip 13. At this time, the mating strip 13 of the herringbone calibration block straightens any bent medicine tubes through radial constraint. During this period, the calibration component 5 can be observed and adjusted to a horizontal state through the bubble level tube.

[0033] Afterwards, the equipment is started. The control device first sends a command to the distance sensor 15, instructing it to detect the inside of the aluminum cover. The laser sensor emits a beam into the inside of the aluminum cover. If the detection distance is within the preset "distance with gasket," such as 8mm, the gasket is determined to be present. If the distance is within the "distance without gasket," such as 11mm, the gasket is determined to be missing, and the control device immediately records the result.

[0034] Because there is a notch on the end face of the medicine tube, the camera needs to capture an image of the notch to accurately measure its length. Therefore, the control device simultaneously activates the detection camera 7 to capture an initial image and uses an image processing algorithm to identify the position of the notch. When the notch is not directly facing the camera, the control device calculates the angular deviation between the current position of the notch and the target position. Subsequently, a rotation command is sent to the servo motor driver, driving the servo motor to rotate the calibration component 5 and the medicine tube by the corresponding angle. For example, if the deviation is 30°, the rotation is 30°, until the camera reports that the notch is directly facing the lens, forming a closed-loop control to ensure accurate positioning.

[0035] After end-face positioning is completed, the detection camera 7 captures a clear image of the end face under ring light illumination. The image data is transmitted to the control device, where an edge detection algorithm identifies the top edge of the medicine tube. Next, combining the ratio between the camera's preset pixel count and the actual size, the length of the medicine tube detected by the camera is calculated, i.e., the distance from the top of the aluminum cap to the tube end face. Then, the control device retrieves pre-stored calibration block height data and performs a comparison process, such as addition, with the length detected by the camera to obtain the final actual length of the medicine tube.

[0036] The control device then compares the final length with the preset acceptable range and makes a comprehensive judgment based on the gasket inspection results. If the length is within the acceptable range and the gasket is present, it is judged as acceptable, the display shows "Acceptable," and the number of acceptable items is accumulated. If the length exceeds the range or the gasket is missing, it is judged as unacceptable, the alarm device is activated, the display shows the specific unacceptable item, such as "Length out of tolerance" or "Missing gasket," and the number of unacceptable items is accumulated.

[0037] Finally, after the test is completed, the servo motor returns to its initial position, and the operator removes the tested medicine tube and aluminum cap, completing one test process.

[0038] During initial testing, there is no need to specifically set the initial orientation of the V-shaped opening at the end of the medicine tube. The rotation device 2 allows the V-shaped opening at different angles, facilitating the acquisition of the actual opening direction of the V-shaped opening by the detection camera 7. This provides the necessary orientation determination basis during the final tube length measurement. During use, the rotation device 2 allows for real-time rotation of the medicine tube, enabling multi-angle photographic measurements during V-shaped opening direction confirmation and total tube length measurement.

[0039] Furthermore, the directions or positional relationships described in this utility model are based on the directions or positional relationships shown in the accompanying drawings. They are only for the purpose of facilitating the description of this utility model and simplifying the description, and are not intended to indicate or imply that the device or structure referred to must have a specific orientation, or to operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A simple aluminum cap gasket missing detection device, including a holding device, characterized in that: The holding device includes a mounting base (1), a rotating device (2) is mounted on the mounting base (1), a calibration component (5) is mounted on the rotating device (2), a distance detection device (3) is also mounted on the mounting base (1), and a visual inspection device (4) is mounted on one side of the holding device; the rotating device (2) includes a motor assembly connected to the mounting base (1), and the calibration component (5) is mounted on the drive shaft of the motor assembly; the visual inspection device (4) includes a support bracket (6), and a detection camera (7) is mounted on the support bracket (6), the viewing area of ​​the detection camera (7) corresponds to the position of the calibration component (5); a control device is mounted on the holding device, and the control device is electrically connected to the motor assembly, the distance detection device (3), and the detection camera (7).

2. The simplified aluminum cap gasket missing detection device according to claim 1, characterized in that: The holding device is a hollow bracket, on which a holding plate (8) is installed. The holding plate (8) has a reserved installation hole, and a motor assembly is connected to the reserved installation hole. A limit block (9) extends from the outside of the power supply assembly, and the limit block (9) is located at the upper end of the holding plate (8).

3. The simplified aluminum cap gasket missing detection device according to claim 2, characterized in that: A buffer pad is placed between the limiting block (9) and the holding plate (8).

4. The simple aluminum cap gasket missing detection device according to claim 1, characterized in that: The motor assembly is a servo motor, and a speed reducer is installed on the servo motor.

5. The simplified aluminum cap gasket missing detection device according to claim 1, characterized in that: The distance detection device (3) includes a lifting bracket (10) connected to the mounting base (1), an angle adjustment block (11) is installed on the lifting bracket (10), an arc adjustment groove is provided on the angle adjustment block (11), an adjustment screw is installed on the arc adjustment groove, and the adjustment screw is connected to the lifting bracket (10); a distance sensor (15) is installed on the angle adjustment block (11).

6. The simplified aluminum cap gasket missing detection device according to claim 5, characterized in that: The distance sensor (15) is a laser sensor or an infrared sensor; the arc adjustment groove is marked with an angle scale.

7. The simplified aluminum cap gasket missing detection device according to claim 5, characterized in that: A transverse support block (12) is installed on the lifting bracket (10). The transverse support block (12) is connected to a translation adjustment block by adjusting bolts. The tilt adjustment block (11) is connected to the translation adjustment block.

8. The simple aluminum cap gasket missing detection device according to claim 1, characterized in that: The calibration component (5) is a herringbone-shaped calibration block, the lower end of which is connected to the drive shaft of the motor assembly; the upper end of the herringbone-shaped calibration block is provided with mating inserts (13); and a bubble level tube is installed on the calibration component (5).

9. The simplified aluminum cap gasket missing detection device according to claim 1, characterized in that: The control device is a PLC controller or an industrial computer.

10. The simplified aluminum cap gasket missing detection device according to claim 1, characterized in that: The inspection camera (7) has a replaceable filter assembly (14) installed on its lens; the visual inspection device (4) also includes a ring light source, which is installed on the outer periphery of the lens of the inspection camera (7) and is connected to a light source controller.

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