A cigarette pack conveying detection device

Abstract

This application discloses a cigarette pack conveying and inspection device, relating to the field of tobacco machinery technology. It includes a conveyor belt, an inspection mechanism, and a guiding mechanism. The inspection mechanism has a housing located above the conveyor belt, and the housing has an inspection channel that overlaps with the conveyor belt's transport space. The guiding mechanism has at least one pair of symmetrically arranged guide ropes. Each guide rope passes through the inspection channel along the transport direction of the conveyor belt, and its two ends are fixed to the side wall of the housing by adjustable tensioning components, so that a guiding channel is formed between the two guide ropes. During use, the guiding channel formed by the tensioned guide ropes constrains the swaying of the cigarette pack while reducing obstruction of the cigarette pack, balancing the limiting effect with the exposure requirements of the inspection area, effectively improving the defect detection rate.

Description

Technical Field

[0001] This application relates to the field of tobacco machinery technology, and in particular to a tobacco pack conveying and detection device. Background Technology

[0002] In tobacco production, inspection during the cigarette pack transportation process is a core step in ensuring product quality, improving production efficiency, and reducing scrap rates. However, cigarette packs are prone to positional shifts due to non-directional swaying during high-speed transportation, directly affecting the imaging effect of optical inspection equipment (such as cameras and light sources), thereby reducing the detection rate of packaging defects (such as wrinkles and printing errors).

[0003] Chinese patent application number CN202221218966.9 discloses "a telescopic pressure guide rod in a cigarette pack conveying channel". The solution provided by this patent consists of a pressure rod, a sliding rod, a telescopic sleeve rod, and an adjusting bolt. The pressure rod, through the cooperation of the sliding rod and the telescopic sleeve rod, can adjust the overall length to adapt to different channel requirements; the adjusting bolt is used to control the downward pressure applied by the pressure rod to the cigarette pack, preventing the cigarette pack from jumping or deviating.

[0004] Chinese patent application number CN202322465665.7 discloses "A cigarette pack turning and conveying device with a limiting structure". The solution provided by this patent includes a limiting device, a lower conveyor belt, and a lifting block. The limiting device consists of a stop block and a mounting bracket. The stop block is fixed to the cigarette pack support guide plate via the mounting bracket, limiting the positional displacement of the cigarette pack during turning. The lifting block is linked to a cam slider mechanism to ensure that the cigarette pack remains fixed when the machine stops.

[0005] The two patents employ rod and plate structures, respectively, to limit the movement of cigarette packs during high-speed transport. However, the large cross-section of the rod / plate structure (e.g., diameter ≥ 5mm) increases the area obstructed on the cigarette pack surface, directly affecting the imaging effect of optical inspection equipment (such as cameras and light sources) and reducing the detection rate of packaging defects. Therefore, this application proposes a cigarette pack transport and inspection device that can limit the movement of cigarette packs while reducing the obstruction of the inspection area by the limiting structure during transport and inspection. Utility Model Content

[0006] The main purpose of this application is to provide a cigarette pack conveying and detection device, which aims to solve the technical problem that the rod / plate-shaped limiting structure in the prior art obstructs a large area of ​​the cigarette pack.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] A cigarette pack conveying and detection device, comprising:

[0009] Conveyor belts are used to transport cigarette packs;

[0010] The testing mechanism includes a housing located above the conveyor belt, the housing having a testing channel that overlaps with the transport space of the conveyor belt;

[0011] The guiding mechanism includes at least one pair of symmetrically arranged guide ropes. Each guide rope passes through the detection channel along the transport direction of the conveyor belt, and its two ends are fixed to the side wall of the box by an adjustable tensioning assembly, so that a guiding channel is formed between the two guide ropes and used to restrain the multi-directional irregular swing of the cigarette pack.

[0012] As a further improvement of this utility model, the tensioning component includes:

[0013] The base is located on the side wall of the enclosure;

[0014] The guide wheel, which is axially perpendicular to the top surface of the conveyor belt, is rotatably mounted on the end face of the base away from the box, and has a limiting groove in its circumference that matches the guide rope;

[0015] A connecting block is located on the side of the guide wheel facing away from the detection channel;

[0016] One end of the guide rope passes around the limiting groove and connects to the connecting block, thereby fixing one end of the guide rope to the side wall of the box.

[0017] As a further improvement of this utility model, the tensioning component further includes:

[0018] The first bracket is vertically fixed to the end face of the base away from the box body and is located between the guide wheel and the connecting block;

[0019] Two limiting plates are symmetrically arranged at both ends of the guide wheel axial direction, and each limiting plate is rigidly connected to the first bracket and the base respectively;

[0020] The first screw has one end connected to the guide wheel on the side opposite to the detection channel, and the other end extends toward the first bracket on the side opposite to the detection channel and is threaded through the first bracket.

[0021] The first screw is driven to rotate around its own axis to push the guide wheel closer to / away from the detection channel.

[0022] As a further improvement of this utility model, the tensioning component further includes:

[0023] The second bracket is vertically fixed to the end face of the base away from the housing, and is located on the side of the first bracket opposite to the guide wheel;

[0024] The second screw is provided along the extension direction of the first screw, and one end is threaded through the second bracket. The second screw has a through hole connecting its two ends. One end of the guide rope passes through the through hole and is fixedly connected to the connecting block.

[0025] The connecting block abuts against one end of the second screw, and the second screw is driven to rotate around its own axis, so as to move the connecting block closer to / away from the detection channel.

[0026] As a further improvement of this utility model, the box body is provided with a hollow cavity, which is connected to the detection channel. The side wall of the box body is provided with a linear mounting groove that is connected to the cavity. The mounting groove extends in a direction perpendicular to the top surface of the conveyor belt. At least one pair of mounting grooves are provided at each end of the detection channel. Each pair of mounting grooves is symmetrically distributed on both sides of the length direction of the detection channel. The base is connected to the corresponding mounting groove by bolts. By controlling and changing the connection position of the base to the corresponding mounting groove, the height of the guide rope from the top surface of the conveyor belt can be changed.

[0027] As a further improvement of this utility model, the detection mechanism further includes:

[0028] A trigger sensing unit is located inside the cavity and is used to send a signal when the cigarette pack passes through its detection area;

[0029] An image acquisition unit is located inside the cavity and is used to acquire images of the cigarette pack;

[0030] An illumination unit is located inside the cavity and is used for illumination.

[0031] As a further improvement of this utility model, the cigarette pack conveying detection device also includes a control unit that is electrically connected to the trigger sensing unit, the image acquisition unit and the lighting unit respectively; the control unit has a number of control commands pre-stored, and the control unit receives and processes the signals emitted by the photosensitive sensor, and matches the corresponding control commands to control the image acquisition unit and the lighting unit respectively.

[0032] The technical solution provided in this application may include the following beneficial effects:

[0033] In use, this application replaces the traditional structure with at least a pair of symmetrically arranged guide ropes. Each guide rope passes through the detection channel along the conveying direction. After each pair of guide ropes is tensioned, a guide channel is formed to constrain the moving cigarette packs that pass through the detection channel, taking into account both the limiting effect and the exposure requirements of the detection area, thus effectively improving the defect detection rate. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 A schematic diagram of the three-dimensional structure of a cigarette pack conveying and detection device. Figure 1 ;

[0036] Figure 2 yes Figure 1 A three-dimensional structural diagram of the central guide mechanism;

[0037] Figure 3 yes Figure 1 A three-dimensional structural diagram of the middle box;

[0038] Figure 4 yes Figure 2 A three-dimensional structural diagram of the intermediate tensioning component;

[0039] Figure 5 yes Figure 4 Cross-sectional view of the tensioning assembly;

[0040] Figure 6 A schematic diagram of the three-dimensional structure of a cigarette pack conveying and detection device. Figure 2 ;

[0041] Figure label:

[0042] 1. Conveyor belt; 2. Detection mechanism; 21. Housing; 211. Detection channel; 212. Cavity; 213. Mounting slot; 22. Trigger sensing unit; 23. Image acquisition unit; 24. Illumination unit; 3. Guiding mechanism; 31. Guide rope; 32. Tensioning assembly; 321. Base; 322. Guide wheel; 322a. Limiting groove; 323. Connecting block; 324. First bracket; 325. Limiting plate; 326. First screw; 327. Second bracket; 328. Second screw; 328a. Through hole. Detailed Implementation

[0043] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not 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 application.

[0044] 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 at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0048] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

[0049] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0050] Figure 1 An embodiment of a cigarette pack conveying and detection device of this application is shown; see [link to relevant documentation]. Figure 1 In this embodiment, the cigarette pack conveying and detection device includes: a conveyor belt 1, a detection mechanism 2, and a guiding mechanism 3.

[0051] Among them, see Figure 1 The detection mechanism 2 includes a housing 21 positioned above the conveyor belt 1, with a detection channel 211 overlapping the transport space of the conveyor belt 1. The guiding mechanism 3 includes at least a pair of symmetrically arranged guide ropes 31. Each guide rope 31 passes through the detection channel 211 along the transport direction of the conveyor belt 1, and its two ends are fixed to the side wall of the housing 21 by adjustable tensioning components 32, forming a guiding channel between the two guide ropes 31. This guiding channel constrains the irregular swaying of the cigarette pack in multiple directions, ensuring that when the cigarette pack moves with the conveyor belt 1 and passes through the detection channel 211, the area to be detected is fully exposed before it can affect optical detection equipment (such as cameras or light sources). Compared to rod / plate-like guiding structures, the guiding channel formed by the tensioned guide ropes 31 reduces obstruction of the cigarette pack, maximizing the imaging effect of the optical detection equipment (such as cameras or light sources).

[0052] It should be noted that there are two common positions during the cigarette pack conveying and testing process: one is that the two largest end faces of the cigarette pack face the two sides of the length direction of the testing channel 211, and the other is that one of the largest end faces of the cigarette pack faces upward.

[0053] Optionally, the number of guide ropes 31 is set according to the placement position of the cigarette pack during the conveying process. When the two largest end faces of the cigarette pack face the detection channel 211 to the sides, two pairs of symmetrical and stacked guide ropes 31 are set; when one of the largest end faces of the cigarette pack faces upward, a pair of symmetrical guide ropes 31 are set.

[0054] Optionally, the guide rope 31 adopts a composite functional layer structure, specifically including:

[0055] The core layer is made of multiple strands of ultra-high molecular weight polyethylene fibers twisted together, with a single filament diameter of 0.08 mm and a total number of strands ≥ 24; linear density of 1800D, tensile strength ≥ 35 cN / dtex, and long-term deformation rate < 0.3% (under a load of 5 N).

[0056] Functional coating layer: transparent polyurethane elastomer, thickness 0.2±0.05mm, light transmittance ≥90% (ISO 13468 standard test); Inner layer (302a): doped with 10-15wt% nano boron nitride particles (particle size 50-100nm), coefficient of friction μ≤0.03 (ASTM D1894 test); Outer layer (302b): coated with an antistatic coating, surface resistivity 1×10 6 -1×10 8 Ω / sq (GB / T1410 test);

[0057] The interface reinforcement layer, located between the core layer and the coating layer, is an epoxy resin-based adhesive layer with a thickness of 10-15 μm; it contains oriented carbon nanotubes (5-8 μm in length and 20-50 nm in diameter) with a thermal conductivity ≥25 W / (m·K).

[0058] Optionally, the core layer can be replaced with shape memory alloy wire (Ni-Ti alloy), which has a reversible strain of 0.5-1.2% at an operating temperature of 40-60℃, achieving temperature self-compensating tension; the outer layer of the functional coating can be supplemented with a fluorescent tracer (such as europium-doped yttrium oxide nanoparticles), which emits red fluorescence under 365nm ultraviolet light excitation for visual positioning; the nano boron nitride particles can be replaced with molybdenum disulfide / graphene composite lubricant (mass ratio 1:2), further reducing the coefficient of friction to μ≤0.015.

[0059] Further, see Figure 2The tensioning assembly 32 includes: a base 321, a guide wheel 322, and a connecting block 323; the base 321 is fixed to the side wall of the housing 21; the guide wheel 322 is axially perpendicular to the top surface of the conveyor belt 1 and is rotatably mounted on the end face of the base 321 away from the housing 21, and has a limiting groove 322a in its circumference that matches the guide rope 31; the connecting block 323 is located on the side of the guide wheel 322 facing away from the detection channel 211, and one end of the guide rope 31 passes around the limiting groove 322a and is connected to the connecting block 323, so that one end of the guide rope 31 is fixed to the side wall of the housing 21.

[0060] Optionally, the two bases 321 at the same end of each pair of guide ropes 31 are respectively located on the two sides of the two guide ropes 31 that are far apart from each other. With the help of the two guide wheels 322, both ends of the guide channel can be formed into a trumpet shape, so that each cigarette pack can enter the guide channel and move and pass through the detection channel 211 in the same position.

[0061] Further, see Figure 3 The housing 21 has a hollow cavity 212, which is connected to the detection channel 211. The side wall of the housing 21 is provided with mounting grooves 213 that are connected to the cavity 212 at both ends of the detection channel 211. Bolts are installed in the mounting grooves 213. The base 321 is connected to the side wall of the housing 21 by bolts in the mounting grooves 213.

[0062] Optionally, the mounting groove 213 is a linear groove that is radially perpendicular to the top surface of the conveyor belt 1. At least one pair of mounting grooves 213 are provided at both ends of the detection channel 211. Each pair of mounting grooves 213 is distributed on both sides of the detection channel 211 to adjust the height of the base 321 from the top surface of the conveyor belt 1, thereby adjusting the height of the guide rope 31 floating in the air.

[0063] Further, see Figure 4 The tensioning assembly 32 further includes: a first bracket 324, a limiting plate 325, and a first screw 326; the first bracket 324 is vertically fixed to the end face of the base 321 away from the housing 21, and is located between the guide wheel 322 and the connecting block 323; two limiting plates 325 are symmetrically arranged at both ends of the guide wheel 322 along its axial direction, and each limiting plate 325 is rigidly connected to the first bracket 324 and the base 321 respectively; one end of the first screw 326 is connected to the side of the guide wheel 322 facing away from the detection channel 211, and the other end extends toward the side of the first bracket 324 facing away from the detection channel 211 and is threaded through the first bracket 324; the first screw 326 is driven to rotate around its own axis to push the guide wheel 322 closer to / away from the detection channel 211.

[0064] Further, see Figure 5The tensioning assembly 32 further includes: a second bracket 327 and a second screw 328; the second bracket 327 is vertically fixed to the end face of the base 321 away from the housing 21, and is located on the side of the first bracket 324 facing away from the guide wheel 322; the second screw 328 is arranged along the extension direction of the first screw 326, and one end is threaded through the second bracket 327; the second screw 328 is provided with a through hole 328a connecting its two ends, and one end of the guide rope 31 passes through the through hole 328a and is fixedly connected to the connecting block 323; the connecting block 323 abuts against one end of the second screw 328 and drives the second screw 328 to rotate around its own axis, so as to drive the connecting block 323 closer to / away from the detection channel 211.

[0065] Optionally, an adjustment knob is fixedly connected to one end of the first screw 326 and the second screw 328 facing away from the detection channel 211, so that an external force can drive the first screw 326 and the second screw 328 to rotate around their respective axes.

[0066] In this embodiment, at least one pair of symmetrically arranged guide ropes 31 replace the traditional structure. Each guide rope 31 passes through the detection channel 211 along the conveying direction. After tensioning, each pair of guide ropes 31 forms a guide channel to constrain the movement of the cigarette pack and its passage through the detection channel 211, reducing irregular swaying of the cigarette pack in multiple directions. At the same time, the tensioning assembly 32 adjusts the tension and spatial position of the guide ropes 31 through the base 321, guide wheel 322, and screw structure to form a funnel-shaped channel entrance, ensuring that the cigarette pack enters stably and maintains its position. This approach balances the limiting effect with the exposure requirements of the detection area, effectively improving the defect detection rate.

[0067] To complete the inspection during the cigarette pack transportation process, based on the above embodiments, see [link to relevant documentation]. Figure 6 The detection mechanism 2 also includes a trigger sensing unit 22, an image acquisition unit 23, and an illumination unit 24.

[0068] Among them, see Figure 6 The trigger sensing unit 22, the image acquisition unit 23, and the illumination unit 24 are all located inside the cavity 212 of the housing 21. The trigger sensing unit 22 sends a signal when the cigarette pack passes through its detection area to facilitate subsequent detection operations; the image acquisition unit 23 is used to acquire images of the cigarette pack; and the illumination unit 24 is used for illumination to improve the brightness of the cavity 212 inside the housing 21.

[0069] Optionally, in this embodiment, the trigger sensing unit 22 can be a photoelectric through-beam sensor. Infrared transmitters and receivers are symmetrically installed on both sides of the cavity 212 of the housing 21. When the smoke pack passes through the detection area and blocks the light path, the receiver outputs a level transition signal, triggering the image acquisition unit 23 to start. This solution has a fast response speed (≤1ms), is suitable for high-speed conveyor lines (≥5m / s), and has strong resistance to smoke and dust interference.

[0070] Alternatively, in this embodiment, the image acquisition unit 23 may adopt the following scheme:

[0071] Global shutter industrial camera: Employs a 5-megapixel CMOS sensor (such as IMX264) paired with a telecentric lens (FOV 100mm×75mm), capturing hexahedral images of cigarette packs at 60fps and transmitting them to an industrial computer via a CoaXPress interface. Suitable for high-precision inspection (defect recognition accuracy ≤0.1mm), requires the use of a ring LED light source (color temperature 6000K) to eliminate shadows.

[0072] Linear scanning camera: Equipped with a 2048-pixel linear CCD (such as TCD2569C), it is triggered synchronously with the conveyor belt speed (encoder feedback) to continuously scan the surface of the cigarette pack and generate seamless stitched images. It is suitable for full-surface inspection of long cigarette packs (such as cartons), with a resolution of up to 0.05mm / pixel. It needs to be used with a diffuser plate to even out the light and avoid glare interference.

[0073] Furthermore, the cigarette pack conveying detection device also includes a control unit that is electrically connected to the trigger sensing unit 22, the image acquisition unit 23, and the lighting unit 24 respectively. The control unit has a number of control commands pre-stored. The control unit receives and processes the signals sent by the trigger sensing unit 22, and matches the corresponding control commands to control the image acquisition unit 23 and the lighting unit 24 respectively.

[0074] Optionally, in this embodiment, the control unit can use a multi-core ARM Cortex-M7 processor (such as STM32H743) as its core, integrating a CAN bus and a gigabit Ethernet interface, respectively connecting the trigger sensing unit 22 and the image acquisition unit 23 to achieve real-time signal transmission. Its pre-stored instruction library contains multiple logic branches: for example, when the photoelectric beam sensor is triggered, the global shutter camera (60fps) and the ring light source (80% brightness) are immediately activated, and the defect detection algorithm is called synchronously; if the capacitive sensor detects abnormal accumulation (signal duration > 100ms), the system switches to the line scan camera and activates the alarm. The speed of the conveyor belt 1 is fed back by the encoder, dynamically adjusting the camera exposure time (10μs~1ms) and the light source PWM dimming frequency (1kHz) to ensure no motion blur in the image. A hardware timer (error ±0.1ms) strictly synchronizes the signal acquisition, illumination, and shooting sequence, supporting cloud algorithm updates (such as CNN model optimization) and fault diagnosis (monitoring current / communication status, triggering redundancy or shutdown in case of abnormalities). This solution combines high real-time performance (response latency <1ms), multi-protocol compatibility (GigE Vision, IO-Link) and modular expansion capabilities, making it suitable for high-speed production lines and complex testing requirements.

[0075] It should be noted that this embodiment focuses on the working principle of the control unit. The specific structure of the control unit is not the focus of this embodiment and is existing technology. Therefore, this embodiment and the accompanying drawings will not describe the specific structure of the control unit in detail.

[0076] To further explain, this embodiment focuses on the working principle of the trigger sensing unit 22, the image acquisition unit 23, and the illumination unit 24. The specific structure of the trigger sensing unit 22, the image acquisition unit 23, and the illumination unit 24 is not the focus of this embodiment and is existing technology. This embodiment and the accompanying drawings have given the installation position or area of ​​the trigger sensing unit 22, the image acquisition unit 23, and the illumination unit 24, and the specific structure of the trigger sensing unit 22, the image acquisition unit 23, and the illumination unit 24 will not be described in detail again.

[0077] In this embodiment, the detection mechanism 2 integrates a trigger sensing unit 22, an image acquisition unit 23, and an illumination unit 24 within the cavity 212 of the housing 21. The control unit uses a multi-core processor to synchronously coordinate sensor signals, light source brightness, and camera parameters, and dynamically optimizes exposure and trigger timing in conjunction with encoder feedback to ensure that defect detection of cigarette packs is completed under high-speed conveying conditions.

[0078] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by this application; the dimensions of the drawings are not related to the specific physical object, and the physical object dimensions can be arbitrarily changed.

Claims

1. A cigarette packet delivery detection apparatus, characterised in that, include: Conveyor belt (1), used for conveying cigarette packs; The testing mechanism (2) includes a box (21) located above the conveyor belt (1), and the box (21) is provided with a testing channel (211) that overlaps with the transport space of the conveyor belt (1); The guiding mechanism (3) includes at least one pair of symmetrically arranged guide ropes (31). Each guide rope (31) passes through the detection channel (211) along the transport direction of the conveyor belt (1). Both ends of the guide rope (31) are fixed to the side wall of the box (21) by adjustable tensioning components (32) so that a guiding channel is formed between the two guide ropes (31) and used to constrain the irregular swing of the cigarette pack in multiple directions.

2. The tobacco pack conveying and detection device according to claim 1, characterized in that, The tensioning assembly (32) includes: A base (321) is provided on the side wall of the box (21); The guide wheel (322) is axially perpendicular to the top surface of the conveyor belt (1) and is rotatably mounted on the end face of the base (321) away from the box (21). It is provided with a limiting groove (322a) in the circumferential direction that matches the guide rope (31). A connecting block (323) is provided on the side of the guide wheel (322) facing away from the detection channel (211); One end of the guide rope (31) passes around the limiting groove (322a) and is connected to the connecting block (323), thereby fixing one end of the guide rope (31) to the side wall of the box (21).

3. The tobacco pack conveying and detection device according to claim 2, characterized in that, The tensioning assembly (32) also includes: The first bracket (324) is vertically fixed to the end face of the base (321) away from the box (21) and is located between the guide wheel (322) and the connecting block (323); Two limiting plates (325) are symmetrically arranged at both ends of the axial direction of the guide wheel (322), and each limiting plate (325) is rigidly connected to the first bracket (324) and the base (321) respectively; The first screw (326) has one end connected to the guide wheel (322) on the side opposite to the detection channel (211), and the other end extends to the first bracket (324) on the side opposite to the detection channel (211) and is threaded through the first bracket (324). The first screw (326) is driven to rotate about its own axis to push the guide wheel (322) closer to / away from the detection channel (211).

4. The tobacco pack conveying and detection device according to claim 3, characterized in that, The tensioning assembly (32) also includes: The second bracket (327) is vertically fixed to the end face of the base (321) away from the box (21) and is located on the side of the first bracket (324) facing away from the guide wheel (322); The second screw (328) is provided along the extension direction of the first screw (326), and one end is threaded through the second bracket (327). The second screw (328) is provided with a through hole (328a) connecting its two ends. One end of the guide rope (31) passes through the through hole (328a) and is fixedly connected to the connecting block (323). The connecting block (323) is brought into contact with one end of the second screw (328), and the second screw (328) is driven to rotate around its own axis, so as to move the connecting block (323) closer to / away from the detection channel (211).

5. The tobacco pack conveying and detection device according to claim 4, characterized in that, The housing (21) has a hollow cavity (212) that communicates with the detection channel (211). The side wall of the housing (21) has a linear mounting groove (213) that communicates with the cavity (212). The mounting groove (213) extends in a direction perpendicular to the top surface of the conveyor belt (1). At least one pair of mounting grooves (213) are provided at both ends of the detection channel (211). Each pair of mounting grooves (213) is symmetrically distributed on both sides of the length direction of the detection channel (211). The base (321) is connected to the corresponding mounting groove (213) by bolts. By controlling and changing the connection position of the base (321) to the corresponding mounting groove (213), the height of the guide rope (31) from the top surface of the conveyor belt (1) can be changed.

6. The tobacco pack conveying and detection device according to claim 5, characterized in that, The testing facility (2) also includes: A trigger sensing unit (22) is located inside the cavity (212) and is used to send a signal when the cigarette pack passes through its detection area; An image acquisition unit (23) is located inside the cavity (212) and is used to acquire images of the cigarette pack; An illumination unit (24) is disposed in the cavity (212) for illumination.

7. The tobacco pack conveying and detection device according to claim 6, characterized in that, It also includes a control unit that is electrically connected to the trigger sensing unit (22), the image acquisition unit (23) and the illumination unit (24) respectively; the control unit has a number of control commands stored in it, and the control unit receives and processes the signals emitted by the photosensitive sensor, and matches the corresponding control commands to control the image acquisition unit (23) and the illumination unit (24) respectively.

Images