A packet detection device
By setting turbulence holes and air inlets on the detection plate, the defects in the transparent paper are magnified by gas disturbance. Combined with multi-angle image acquisition, the problem of low recognition accuracy of existing small package detection devices is solved, and efficient and low-cost defect recognition and rejection are achieved.
Patent Information
- Application Number
- CN202521020461.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-22
- Publication Date
- 2026-05-29
- Estimated Expiration
- 2035-05-22
AI Technical Summary
Existing small package inspection devices have low accuracy in detecting defects such as minor wrinkles and curling edges in the transparent paper, which can easily lead to missed detections and cause defective cigarette packs to enter subsequent processes and the market.
The method involves setting turbulence holes and air inlets on the detection plate, creating gas disturbance through the air supply pipeline to amplify defects in the transparent paper, and combining this with a vision inspection device to acquire images from multiple angles. The sensor group identifies the defects, and the PLC controller removes defective packages.
It improves the accuracy of small package inspection, reduces the rate of missed detection of defective products, ensures packaging quality, and has a simple structure and low cost.
Smart Images
Figure CN224297535U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of cigarette packaging equipment, specifically relating to a small package detection device. Background Technology
[0002] In the packaging process of small packs of cigarettes (or small packages), the ZB45 and ZB25 packaging equipment currently mainly use proximity switch detection mode to detect loose packages after the small packages are wrapped in transparent paper. When the loose transparent paper touches the corresponding detection head, the equipment receives a signal and rejects the loose package. However, the existing detection mode is prone to missing cigarette packages with a low degree of looseness, causing defective products to flow into the finished product.
[0003] Visual inspection methods are also available on the market. When a small package enters the target area, a camera captures an image of its appearance, which is then analyzed by an industrial control computer. When the analysis indicates that the package's appearance is unacceptable, a rejection command is output, controlling the rejection mechanism to remove the defective package. However, due to factors such as the imaging environment and the degree of wrinkles or curling of the cellophane, simple visual inspection is prone to low accuracy in identifying defective packages with low degrees of wrinkles or curling, easily leading to missed detections and causing defective cigarette packages to enter subsequent processes and the market. Therefore, it is necessary to improve the small package inspection device. Utility Model Content
[0004] The purpose of this invention is to provide a small package inspection device to solve the problems mentioned in the background art. By controlling the turbulence during the conveying of small packages to the inspection station, defects present in the packages are magnified and detected in conjunction with visual inspection, thereby improving inspection accuracy and achieving high practicality.
[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:
[0006] A small package inspection device includes mounting frames installed on both sides of a small package conveying channel, and an inspection disc rotatably installed between the two mounting frames. One of the mounting frames is equipped with a driving component that drives the inspection disc to rotate, receiving small packages conveyed by the small package conveying channel and transferring the small packages to an inspection output channel. The outer surface of the inspection disc is provided with at least five inspection positions, and side air outlets are provided on both sides of each inspection position. The other mounting frame is provided with a turbulence hole and an air inlet hole. An air inlet hole is provided on the inspection disc near the air inlet hole, and an air supply pipe is provided inside the inspection disc connecting the air inlet hole and the side air outlet. A sensor support frame is installed on the top of the mounting frame, and a sensor group is installed on the sensor support frame for visual inspection of the small packages at the inspection positions rotated to a designated position.
[0007] In this application, a turbulence hole and an air inlet are provided on the mounting bracket, and a side air outlet is provided on the detection plate. An air supply pipeline connected to the side air outlet and the air inlet can supply or evacuate air to the detection position, thereby creating a small gas disturbance. This gas disturbance can amplify defects such as poorly bonded transparent paper or transparent paper with small curling edges, helping the sensor group on the sensor support to detect and identify the appearance defects of the small packages. Subsequently, the defective packages are rejected in the detection output channel. This device has a simple structure and high practicality.
[0008] Furthermore, the outer surface of the detection disk is provided with six detection positions, and the side air outlets on both sides of the detection positions are two elongated notches separated by a middle section.
[0009] Furthermore, the air inlet and the air outlet are connected to a pumping pipe, through which air is supplied and drawn in. This facilitates the blowing of the transparent paper at both ends of the small package through the side air outlet, and the blowing of the transparent paper on the top of the small package through the air inlet. The supply and draw of air to the air inlet and the air outlet causes changes in the airflow at the corresponding detection position. This changed airflow creates positive or negative pressure on the transparent paper of the small package at the detection position. If the transparent paper of the small package has defects such as wrinkles or curled edges, these defects will be amplified. Therefore, this helps the sensor group to more accurately identify appearance defects in the small package, preventing defective products from entering the market.
[0010] Furthermore, the sensor support frame is configured with an F-shaped structure; a horizontally positioned arrival detection hole is provided at one end of the sensor support frame near the small package conveying channel, and a direct-view detection hole is provided on the top surface of the sensor support frame, the central axis of which coincides with the vertical center line of the detection disk; a first-view detection hole is provided between the arrival detection hole and the direct-view detection hole, and a second-view detection hole is vertically positioned at the end of the sensor support frame near the small package conveying channel, with the fields of view centers of the first-view detection hole and the second-view detection hole perpendicular to each other. This structural design enables multiple inspections of the small package's appearance from different angles, greatly reducing the missed detection rate of defects in the small package.
[0011] Furthermore, the sensor group includes a position switch and a linear scanning camera. The position switch is installed in the position detection hole; the linear scanning camera is installed in the direct-view detection hole, the first-view detection hole, and the second-view detection hole.
[0012] Furthermore, a rejection mechanism is installed on the detection output channel to reject detected defective packages.
[0013] Furthermore, the sensor group is electrically connected to a PLC controller, and the PLC controller is electrically connected to the rejection mechanism. After the sensor group detects a defective small package, it feeds back a signal to the PLC controller, and the PLC controller issues a rejection command to reject the defective small package through the rejection mechanism.
[0014] The utility model adopting the above technical solution has the following advantages:
[0015] In this application, during use, the gas supply or extraction device is connected to the turbulence hole and air inlet provided on the mounting frame to facilitate gas pumping and extraction. Small packages are transported along the package conveyor channel. When they reach the detection disc, the step-rotating detection disc receives the package and continues to rotate. The previous detection position on the detection disc reaches its highest point of rotation, and the current detection position rotates to a designated position after receiving the package. Air is blown directly through the turbulence hole and through the air inlet and gas supply pipeline to the side outlet, creating small gas disturbances at both ends and the top of the package. These gas disturbances amplify defects such as poorly bonded transparent paper or small curling edges, assisting the sensor group in detection, improving the accuracy of defect identification, and precisely and efficiently detecting appearance defects in the package. Subsequently, defective packages are rejected through a rejection mechanism in the detection output channel. Furthermore, the overall structure is simple, low-cost, and highly practical. Attached Figure Description
[0016] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;
[0017] Figure 1 This is a first structural schematic diagram of an embodiment of a small package detection device according to the present invention;
[0018] Figure 2 This is a second structural schematic diagram of an embodiment of the small package detection device of this utility model;
[0019] Figure 3 This is a right-side view of an embodiment of a small package detection device according to the present invention;
[0020] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along the AA direction;
[0021] Figure 5 This is a schematic diagram of the detection disk in an embodiment of the present invention;
[0022] Figure 6 This is an exploded structural diagram of an embodiment of a small package detection device according to the present invention;
[0023] The symbols for the main components are explained below:
[0024] 101. Small package conveying channel; 102. Arrival detection hole; 103. First-view detection hole; 104. Direct-view detection hole; 105. Mounting bracket; 106. Sensor support bracket; 107. Detection output channel; 108. Rejection interface; 109. Second turbulence hole; 110. Auxiliary air inlet hole; 111. Rotating shaft; 112. Main air inlet hole; 113. First turbulence hole; 114. Second-view detection hole; 115. Detection plate; 116. Second detection position; 117. First detection position; 118. Side air outlet; 119. Limiting protrusion; 120. Air seal groove; 121. Air inlet hole. Detailed Implementation
[0025] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. Furthermore, directional terms mentioned in the embodiments, such as "up," "down," "top," "bottom," "left," "right," "front," and "back," are only for reference to the directions in the drawings and are not intended to limit the scope of protection of the present invention.
[0026] like Figures 1-6 As shown, a small package detection device according to an embodiment of this utility model includes mounting brackets 105 installed on both sides of a small package conveying channel 101, and a detection disk 115 rotatably installed between the two mounting brackets 105. When installing the detection disk 115, a hole can be made in the middle of the mounting bracket 105, a bearing can be installed in the hole, a rotating shaft 111 can be installed through the bearing, and the detection disk 115 can be sleeved on the rotating shaft 111 to achieve the rotatable installation of the detection disk 115. A driving component is installed on one of the mounting brackets 105. The mounting bracket 105 for installing the driving component can be referred to as... Figure 3The mounting bracket 105 on the left side can be driven by a stepper motor. The stepper motor drives the rotating shaft 111 and the detection disk 115 to rotate, which is used to receive small packages conveyed by the small package conveying channel 101 and transfer the small packages to the detection output channel 107. The detection disk 115 is located between the small package conveying channel 101 and the detection output channel 107, and the horizontal height of the detection output channel 107 is lower than that of the small package conveying channel 101. In order to facilitate the smooth reception of small packages, an arc-shaped transition section can be set at the end of the detection output channel 107 near the detection disk 115. The outer surface of the detection plate 115 has six detection positions, each with a side air outlet 118 on both sides. Another mounting bracket 105 has turbulence holes and air inlets. An air inlet 121 is located near the air inlet on the detection plate 115, and an air supply pipe connects the air inlet 121 to the side air outlet 118 inside the detection plate 115. A sensor support bracket 106 is mounted on the top of the mounting bracket 105, and a sensor group, including a camera, is mounted on the sensor support bracket 106 to perform visual inspection of small packages rotated to designated detection positions. During the inspection process, the six detection positions are the first detection position 117, the second detection position 116, and so on, up to the sixth detection position. The visual inspection primarily occurs when the first detection position 117 rotates to the highest point of the rotation path of the detection plate 115.
[0027] In this embodiment, the turbulence holes provided on the mounting bracket 105 are a first turbulence hole 113 and a second turbulence hole 109, and there are two air inlets: a main air inlet 112 and an auxiliary air inlet 110. A horizontally positioned arrival detection hole 102 is provided at one end of the sensor support bracket 106 near the small package conveying channel 101. A direct-view detection hole 104 is provided on the top surface of the sensor support bracket 106, with the central axis of the direct-view detection hole 104 coinciding with the vertical center line of the detection disk 115. A first-view detection hole 103 is provided between the arrival detection hole 102 and the direct-view detection hole 104. A second-view detection hole 114 is vertically positioned at one end of the sensor support bracket 106 near the small package conveying channel 101, with the fields of view centers of the first-view detection hole 103 and the second-view detection hole 114 perpendicular to each other. The arrival detection hole 102 is used to install an arrival switch to detect the arrival of the small package conveyed by the small package conveying channel 101 and to delay the feedback signal to control the stepper motor's operation. Cameras are installed in the direct-view inspection hole 104, the first-view inspection hole 103, and the second-view inspection hole 114. All three cameras can capture images of the top and both ends of the small package. Specifically, the cameras can be CCD industrial cameras. When the first detection position 117 rotates to the highest point of the rotation path of the detection disk 115, the plane of the second detection position 116 forms a 60° angle with the horizontal plane. The camera angles of the first-view inspection hole 103 and the second-view inspection hole 114 relative to the second detection position 116 are equal. Therefore, the presence of defects in the small package can be determined by comparing the image differences between the two cameras. Image acquisition through the camera in the direct-view inspection hole 104, projected onto the front of the package, primarily analyzes defects in the transparent paper on the top of the small package. This achieves multiple defect detection and avoids missed detections.
[0028] As described above, during the image acquisition process by the cameras at the first-view detection hole 103 and the second-view detection hole 114, air can be directly blown onto the upper surface of the small package through the first turbulence hole 113. If the upper transparent paper is curled up, it will be represented in the image. Air is pumped through the main air inlet 112, and blown out through the air inlet 121 and the air supply pipe from the side air outlet 118 to blow the transparent paper at both ends of the small package. If the transparent paper at the ends is curled up, it will also be represented in the image. The image difference comparison (or judgment) is an existing technology. For example, in a cigarette packaging machine, an industrial camera can be used to acquire images of the cigarette pack, and OpenCV feature point detection can be used to perform pixel-level difference detection. With the help of a PLC controller, unqualified products can be rejected in real time to ensure packaging quality.
[0029] In fact, during the image acquisition process of the camera in the direct-view detection hole 104, based on the same operation method as described above, air is pumped or drawn through the second turbulence hole 109 and the auxiliary air inlet 110 to generate airflow changes that amplify the defects in the transparent paper of the small package, which helps the camera in the direct-view detection hole 104 to identify the defects.
[0030] In addition, in this embodiment, both the first turbulence hole 113 and the second turbulence hole 109 can be used for air supply, or one can be used for air supply and the other for air extraction; correspondingly, the main air inlet 112 and the auxiliary air inlet 110 can be operated in the same way. The number of detection positions can also be set to five or eight as needed.
[0031] In this embodiment, the sensor group includes a position switch and a linear scan camera. The position switch is installed in the position detection hole 102; the linear scan camera is installed in the direct-view detection hole 104, the first-view detection hole 103, and the second-view detection hole 114.
[0032] In fact, the sensor support frame 106 in this embodiment can be configured as an F-type structure as needed; the F-type structure and the mounting frame 105 can be interchangeably connected and fixed, improving the installation stability of the sensor group.
[0033] In this embodiment, a limiting protrusion 119 is provided at the end of the detection position to limit the small package. The side air outlets 118 on both sides of the detection position are two elongated notches with a middle partition. A ventilation branch is provided inside the middle partition, and the ventilation branch is connected to the elongated notches on both sides to form an air supply pipeline; the air supply pipeline is also connected to the air inlet 121. The air pumping pipeline connected to the turbulence hole and the air inlet includes an input pipe and an air pump, wherein the air pump can be installed on the mounting bracket 105, and the output port of the air pump is connected to the turbulence hole and the air inlet through the input pipe to realize air pumping.
[0034] In reality, the detection position maintains a stable limit on the small package. The gas transmitted through the turbulence hole and the air inlet does not affect the position of the small package. It mainly blows the transparent paper of the small package to achieve the effect of amplifying defects.
[0035] The outer side of the detection plate 115 is provided with an annular air seal groove 120, and the air inlet 121 is located inside the air seal groove 120; the inner side of the mounting bracket 105 is provided with a sealing groove that engages with the air seal groove 120; the inner end of the corresponding air inlet is located inside the sealing groove; air is supplied to the air inlet 121 through the air inlet, and under the sealing of the air seal groove 120 and the sealing groove, the gas does not leak out.
[0036] In this embodiment, a rejection mechanism is installed on the detection output channel 107 to reject detected defective packages. The rejection mechanism includes a rejection cylinder and a rejection plate installed on the telescopic rod of the rejection cylinder. The rejection cylinder is fixed on either side of the detection output channel 107.
[0037] In fact, the rejection mechanism in this embodiment may include a rejection interface 108 and a rejection nozzle installed on the rejection interface 108. The rejection nozzle is connected to an air pump and rejects defective packages by blowing air.
[0038] In this embodiment, the sensor group is electrically connected to a PLC controller, and the PLC controller is electrically connected to a rejection mechanism. After the sensor group detects a defective small package, it sends a feedback signal to the PLC controller, and the PLC controller issues a rejection command to reject the defective small package through the rejection mechanism.
[0039] The PLC controller can be selected from S7-200PLC or S7-1200PLC as needed; it is widely used in the detection of defects in the outer packaging of cigarette packs in the GDX2 high-speed packaging machine. It can realize functions such as detecting the integrity of the cigarette pack flap, detecting the unraveling of the film packaging, and detecting the asymmetry of the short overlap of the film. Moreover, the cost of manufacturing the detector is low, the reliability is high, and the maintainability is good.
[0040] This structural design, with turbulence holes and air inlets on the mounting frame 105, facilitates gas pumping and extraction. Small packages are conveyed on the small package conveying channel 101. When they reach the detection disc 115, the step-rotating detection disc 115 receives the small package and continues to rotate. The previous detection position on the detection disc 115 reaches its highest point of rotation, and the current detection position rotates from receiving the small package to a designated position (i.e., the second detection position 116 at a 60° angle to the horizontal plane). Air is blown directly through the turbulence holes and through the air inlets and air supply lines to the side air outlet 118, creating small gas disturbances at both ends and the top of the small package. These gas disturbances amplify defects such as poorly bonded transparent paper or small curling edges, assisting the sensor group in detection, improving the accuracy of defect identification, and accurately and efficiently detecting appearance defects in the small package. Subsequently, defective small packages are rejected through a rejection mechanism in the detection output channel 107. This design features a high degree of automation, high accuracy in detecting transparent paper defects, and high practicality.
[0041] The above provides a detailed description of the small package detection device provided by this utility model. The specific embodiments are described only to aid in understanding the method and core concept of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.
Claims
1. A small package detection device, comprising mounting frames installed on both sides of a small package conveying channel, and a detection disk rotatably mounted between the two mounting frames, wherein a driving component is mounted on one of the mounting frames, the driving component driving the detection disk to rotate, for receiving small packages conveyed by the small package conveying channel and transferring the small packages to a detection output channel; characterized in that, The outer surface of the detection plate is provided with at least five detection positions, and side air outlets are provided on both sides of each detection position; another mounting bracket is provided with a turbulence hole and an air inlet hole, and an air inlet hole is provided on the detection plate near the air inlet hole. An air supply pipe is provided inside the detection plate to connect the air inlet hole and the side air outlet; a sensor support bracket is installed on the top of the mounting bracket, and a sensor group is installed on the sensor support bracket for performing appearance inspection on the small package at the detection position rotated to the designated position.
2. The small package detection device according to claim 1, characterized in that: The outer surface of the detection plate is provided with six detection positions, and the side air outlets on both sides of the detection positions are two long strip-shaped notches separated by a middle section.
3. The small package detection device according to claim 1, characterized in that: The turbulence hole and the air inlet are connected to a pumping pipe, through which air is supplied and drawn into the turbulence hole and the air inlet, so as to blow the transparent paper at both ends of the small package through the side air outlet, and to blow the transparent paper on the upper side of the small package through the turbulence hole.
4. The small package detection device according to claim 1, characterized in that: The sensor support frame is configured with an F-shaped structure; a horizontally arranged arrival detection hole is provided at one end of the sensor support frame near the small package conveying channel, and a direct-view detection hole is provided on the top surface of the sensor support frame, the central axis of the direct-view detection hole coincides with the vertical center line of the detection disk; a first-view detection hole is provided between the arrival detection hole and the direct-view detection hole, and a second-view detection hole is vertically arranged at one end of the sensor support frame near the small package conveying channel, the field centers of the first-view detection hole and the second-view detection hole are perpendicular to each other.
5. The small package detection device according to claim 4, characterized in that: The sensor group includes a position switch and a linear scan camera. The position switch is installed in the position detection hole; the linear scan camera is installed in the direct-view detection hole, the first-view detection hole, and the second-view detection hole.
6. The small package detection device according to claim 1, characterized in that: The detection output channel is equipped with a rejection mechanism to reject detected defective packages.
7. A small package detection device according to claim 6, characterized in that: The sensor group is electrically connected to a PLC controller, and the PLC controller is electrically connected to the rejection mechanism. After the sensor group detects a defective small package, it feeds back a signal to the PLC controller, and the PLC controller issues a rejection command to reject the defective small package through the rejection mechanism.