Quality detection method and system for anti-counterfeiting seal of cigarette carton

Abstract

The invention discloses a quality detection method and system for an anti-counterfeiting seal of a cigarette carton, a color code sensor is used for detecting the anti-counterfeiting seal, two photoelectric switches are used as synchronous photoelectric sensors for framing the position of the anti-counterfeiting seal, and the distance between the two photoelectric switches is equal to the length of one anti-counterfeiting seal. When the left edge of the cigarette bar is located between the first optoelectronic switch and the second optoelectronic switch, the anti-fake seal is just located within the detection range of the color code sensor at the moment, whether the anti-fake seal exists or not and whether the anti-fake seal is pasted to deviate or not can be judged by reading the state of the color code sensor within the time period, and the defective cigarette bar can be recognized. And rejecting the defective cigarette cartons at the rejecting position. The problem of quality defects of anti-fake seal labels caused by various reasons in the production process is solved, carton cigarettes with seal quality problems are reduced and even prevented from flowing into the next procedure from the source, and unqualified carton cigarettes are removed in time, so that the purpose of improving the product quality is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of quality inspection of sealing labels on special-shaped cigarette packaging machines, and specifically to a quality inspection method and system for anti-counterfeiting sealing labels of cigarette cartons. Background Technique

[0002] The YB621D gift box cigarette packaging machine is a special-shaped cigarette packaging machine, which is a non-standard customized equipment with a simple and reasonable structure and convenient operation. It mainly completes functions such as filling small packs into gift boxes, sorting cellophane, folding the pull tongue, attaching sealing labels, and packaging the carton with cellophane. During the process of attaching anti-counterfeiting sealing labels, when the production speed is fast, the labeling accuracy and quality will decrease accordingly, and when the labeling accuracy is high, the production speed will decrease accordingly. There are often phenomena where the attachment of anti-counterfeiting sealing labels does not meet the packaging process requirements, such as: no sealing label on the carton, double sealing labels in front of the labeling station, double sealing labels behind the labeling station, a single sealing label being too large and leading, a single sealing label being too large and lagging, etc., which affect the packaging quality of carton cigarettes. After investigation, it is found that there are some defects in the quality inspection and control in the current production process flow, and it is impossible to detect and reject cigarette strips with anti-counterfeiting sealing label quality problems, resulting in problem cigarette strips flowing into subsequent workstations and even into the market. If defective products with anti-counterfeiting sealing label quality defects are found during the production process of subsequent workstations, only rework can be carried out, causing a large amount of material waste and manpower consumption, which not only affects the production efficiency but also increases the production cost of the enterprise. If the anti-counterfeiting sealing label quality defects flow into the market, the quality defects of the carton anti-counterfeiting sealing label are the first thing consumers notice, which damages the trust of the brand in the hearts of consumers, affects the reputation of the enterprise, thus affecting the sales volume of the product and further affecting the efficiency of the enterprise. Therefore, it is very necessary to invent an effective anti-counterfeiting sealing label quality inspection system to promptly reject unqualified products. The existing technical solution of the YB621D gift box cigarette packaging machine is to use a single color mark sensor to detect the presence or absence of the anti-counterfeiting sealing label on the single-sided sealing of the cigarette carton. If a cigarette carton without an anti-counterfeiting sealing label is detected, the cigarette carton will be rejected at the subsequent rejection mechanism. The existing technology of the YB621D gift box cigarette packaging machine is to use a single color mark sensor to detect the presence or absence of the anti-counterfeiting sealing label, but the effect is not very ideal. The specific problems are as follows:

[0003] (1) It is impossible to reject cigarette strips with anti-counterfeiting sealing labels.

[0004] (2) It is impossible to reject when the attachment position of the anti-counterfeiting sealing label is offset (leading or lagging).

[0005] If defective products with anti-counterfeiting seals are found in the subsequent production process, they can only be reworked, resulting in a large amount of material waste and labor consumption, which not only affects production efficiency but also increases the production cost of the enterprise. If products with anti-counterfeiting seals are put on the market, the quality defects of the anti-counterfeiting seals on the boxes will be the first thing consumers notice, which will damage the brand's trust in consumers and affect the company's reputation, thereby affecting product sales and further affecting the company's benefits.

[0006] In the prior art, the invention with announcement number CN209080406 discloses a label detection device for an automatic anti-counterfeiting labeling machine for cigarette cartons. In the device, although it is proposed to use an optical fiber sensor to realize the position judgment technology of the seal, its technical solution still has some shortcomings in actual production. In the solution, the optical fiber sensor 1 must be close to the optical fiber sensor 2, and the optical fiber sensor 4 must be close to the optical fiber sensor 3, in order to correctly realize the function of detecting multiple marks and offsets of the seal, and the installation accuracy is high. Due to the size restriction of the optical fiber sensor itself, the actual implementation is difficult. The spacing l determines the accuracy of offset seal detection, that is, the smaller the spacing, the more accurate it is. However, due to the size restriction of the optical fiber sensor itself, a minimum installation space of 5mm is required, that is, the spacing between two adjacent light spots is greater than 5mm. This will cause misjudgment and misdetection in the case of excessive overlap of multiple seals (the offset part is less than 5mm). Similarly, if the optical fiber sensor spot is too large, with a diameter of about 3mm, if the installation spacing is too small, the signals between each other will interfere, which will also bring about problems such as excessive errors and instability. Summary of the invention

[0007] In order to solve the deficiencies and defects of the above-mentioned prior art, the inventor has developed and designed a complete anti-counterfeiting seal quality detection device, which is a simple structure, ingenious design, and effective anti-counterfeiting seal detection system for carton. It solves the problem of quality defects of anti-counterfeiting seals caused by various reasons in the production process, avoids carton cigarettes with seal quality defects from being mixed into the finished products, reduces or even eliminates carton cigarettes with seal quality problems from flowing into the next process at the source, and promptly removes unqualified carton cigarettes to achieve the purpose of improving product quality. Specifically, the present invention is implemented as follows:

[0008] A method for detecting the quality of an anti-counterfeit seal of a cigarette carton comprises the following steps:

[0009] Step S1: Identify and detect the horizontally passing cigarette cartons on the side of the cigarette carton conveying channel through which the cigarette cartons pass. A color mark sensor, a first photoelectric switch, and a second photoelectric switch are respectively arranged along the traveling direction; the distance between the detection points of the first photoelectric switch and the second photoelectric switch is equal to the length of an anti-counterfeiting seal; the position of the color mark sensor is set so that the distance between the detection point between it and the first photoelectric switch is adapted to the conveying speed of the cigarette conveyor belt, so that when the front end of the cigarette carton is detected by the first photoelectric switch, the anti-counterfeiting seal pasting position on the side wall of the qualified cigarette carton just enters the detection range of the color mark sensor;

[0010] Step S2: The color mark sensor performs color recognition on the passing detection object. When there is a color difference, it can record the seal time information, determine that the anti-counterfeiting seal is detected, and can also make a detection to judge whether there is a seal at a certain time; when the first photoelectric switch and the second photoelectric switch detect the cigarette carton, record the first passing time information and the second passing time information;

[0011] Step S3: In a detection cycle, if the seal time information is earlier than the first passing time information, it is determined that the anti-counterfeiting seal is ahead; if the seal time information is later than the second passing time information, it is determined that the anti-counterfeiting seal is lagging or there is no anti-counterfeiting seal, and it is determined as an unqualified seal;

[0012] Step S4: In a detection cycle, if the seal time information is later than the first passing time information but earlier than the second passing time information, then after delaying a predetermined time value, obtain the detection result of the color mark sensor again, and judge whether the anti-counterfeiting seal exists after the delay of the predetermined time. If it does not exist, it indicates that the anti-counterfeiting seal is pasted in the correct position and is determined as a qualified seal; if it exists, it indicates that the anti-counterfeiting seal is overlapped or multiple anti-counterfeiting seals are pasted, and it is determined as an unqualified seal;

[0013] Step S5: Reject the unqualified seals determined.

[0014] Further, in Step S3, the color mark sensor continuously detects the cigarette cartons. If there is at least one jump signal in the detection result of the color mark sensor, and the time when the jump signal occurs is within the time range of one carton passing after the first photoelectric switch or the second photoelectric switch detects the cigarette carton, it is determined that there are discontinuous multiple anti-counterfeiting seals, which is an unqualified seal.

[0015] On the other hand, the present invention discloses a quality detection system for the anti-counterfeiting seal of cigarette cartons, which is installed on the cigarette carton conveying channel bracket and the cigarette conveyor belt and is used to detect the quality of the anti-counterfeiting seal on the cigarette cartons passing on the cigarette conveyor belt.

[0016] A color mark sensor is placed on the first adjustable mounting bracket and connected to the control unit, so that the color mark sensor faces the side wall of the cigarette carton passing on the cigarette conveyor belt, and is used to transmit the signal of detecting the existence of the anti-counterfeiting seal to the control unit;

[0017] The first photoelectric switch and the second photoelectric switch are sequentially installed on the second mounting bracket along the conveying direction, so that the first photoelectric switch and the second photoelectric switch face the side wall of the cigarette carton passing on the cigarette conveyor belt, and are connected to the control unit, and are used to detect the time signal when the front end of the cigarette carton arrives and send it to the control unit; the distance between the detection points of the first photoelectric switch and the second photoelectric switch is equal to the length of an anti-counterfeiting seal;

[0018] The detection point distance between the color mark sensor and the first photoelectric switch is adapted to the conveying speed of the cigarette conveyor belt, so that when the front end of the cigarette carton enters between the first photoelectric switch and the second photoelectric switch, the anti-counterfeiting seal pasting position on the side wall of the qualified cigarette carton just enters the detection range of the color mark sensor;

[0019] The control unit is connected to the color mark sensor, the first photoelectric switch and the second photoelectric switch, and is used to judge whether the anti-counterfeiting seal is qualified based on the signal of the existence of the anti-counterfeiting seal and the time signal of the front end of the cigarette carton reaching the photoelectric switch, and output the quality detection result of the anti-counterfeiting seal of the cigarette carton.

[0020] Further, the straight line where the first photoelectric switch and the second photoelectric switch are located is parallel to the straight line where the cigarette conveyor belt is located; the horizontal heights where the color mark sensor, the first photoelectric switch and the second photoelectric switch are located are equal to the horizontal height where the anti-counterfeiting seal standard on the side wall of the cigarette carton is located.

[0021] Further, the first adjustable mounting bracket includes:

[0022] An I-shaped base, one end of which is installed on the side wall of the cigarette conveying channel bracket, and the other end is connected to the adjustable vertical plate, and is used to install and support the entire first adjustable mounting bracket;

[0023] The adjustable vertical plate is vertically installed on the I-shaped base and forms a movable connection, and can adjust the height in the vertical direction, and is used to connect and support the adjustable horizontal plate;

[0024] The adjustable horizontal plate is movably horizontally installed at the upper end of the adjustable vertical plate, and can adjust the lateral distance relative to the cigarette conveyor belt in the horizontal direction,

[0025] An L-shaped mounting plate is installed on the side edge of the adjustable horizontal plate close to the cigarette conveyor belt, and is used to install the color mark sensor.

[0026] Further, the L-shaped mounting plate is in a "L-shaped" structure placed horizontally, and through holes for mounting color label sensors are provided on the horizontal surface. The color label sensor is fixedly connected to the L-shaped mounting plate through fastening bolts;

[0027] The adjustable horizontal plate is provided with horizontal through slots for adjusting the mounting position in the horizontal direction; the upper end of the adjustable vertical plate is provided with a vertical screw rod that can be inserted into the horizontal through slot, and the vertical screw rod can be locked and fixedly connected to the adjustable horizontal plate through a fastening nut; the adjustable horizontal plate can be horizontally translated and adjusted relative to the vertical screw rod in the horizontal through slot;

[0028] The plate surface of the adjustable vertical plate is provided with vertical through slots; the outer end of the I-shaped base is provided with a horizontal screw rod, the horizontal screw rod is inserted into the vertical through slot, and the horizontal screw rod can be locked and fixedly connected to the adjustable vertical plate through a fastening nut; the adjustable vertical plate can be vertically adjusted in height relative to the I-shaped base.

[0029] Further, the second mounting bracket includes:

[0030] An L-shaped mounting base, and mounting holes are provided on the vertical surface of the L-shaped mounting base, and it is fixedly mounted on the side wall of the cigarette conveying channel bracket through fastening bolts passing through the mounting holes;

[0031] A horizontal mounting piece, which is mounted on the horizontal plane of the L-shaped mounting base and is used for mounting a first photoelectric switch and a second photoelectric switch.

[0032] Further, the control unit determines whether the anti-counterfeiting seal is qualified as follows: within a detection working cycle, if the seal time information is earlier than the first passing time information, it is determined that the anti-counterfeiting seal is advanced; if the seal time information is later than the second passing time information, it is determined that the anti-counterfeiting seal is lagging or there is no anti-counterfeiting seal, and it is determined as an unqualified seal;

[0033] Within a detection working cycle, if the seal time information is later than the first passing time information but earlier than the second passing time information, then after delaying a predetermined time value, the detection result of the color label sensor is obtained again to determine whether the anti-counterfeiting seal exists after the predetermined delay time. If it does not exist, it indicates that the anti-counterfeiting seal is correctly pasted and is determined as a qualified seal; if it exists, it indicates that the anti-counterfeiting seal is overlapped or multiple anti-counterfeiting seals are pasted, and it is determined as an unqualified seal.

[0034] Introduction to the working principle of the present invention: To achieve the purpose of detecting cigarettes with multiple anti-counterfeiting seals and offset anti-counterfeiting seals, the present invention uses a color label sensor to detect the anti-counterfeiting seal, and two photoelectric switches are used as synchronous photoelectric sensors to frame the position of the anti-counterfeiting seal. The distance between the two photoelectric switches is the length of one anti-counterfeiting seal. The schematic diagram is as shown in (Appendix Figure 1) When the left edge of the cigarette rod is between the first photoelectric switch and the second photoelectric switch, the anti-counterfeiting seal is just within the detection range of the color mark sensor at this time. By reading the state of the color mark sensor during this period, we can determine whether the anti-counterfeiting seal exists and whether the anti-counterfeiting seal is pasted with offset, and then identify the problematic cigarette rod, and remove the problematic cigarette rod at the removal position.

[0035] The circuit control block diagram of the quality detection system for the anti-counterfeiting seal of the cigarette carton of the present invention is as shown in ( Figure 2 ). The control unit is the IPC of the YB621D case packer. The unqualified cartons of cigarettes will be shifted, and when receiving the signal of the removal sensor, they will be removed by the removal mechanism.

[0036] In actual use: After the carton is pasted with the anti-counterfeiting seal by the labeling machine, it advances along the cigarette conveyor belt in the running direction. If the color mark sensor detects the existence signal of the anti-counterfeiting seal before the cigarette rod reaches the synchronous first photoelectric switch, it is determined that the anti-counterfeiting seal is ahead. On the contrary, if the color mark sensor still detects the existence signal of the anti-counterfeiting seal after the front end of the cigarette rod passes the synchronous second photoelectric switch, it is determined that the anti-counterfeiting seal is lagging. If the front end of the cigarette rod passes the synchronous first photoelectric switch and has not reached the synchronous second photoelectric switch, and the color mark sensor detects the existence of the anti-counterfeiting seal, it is further divided into the following situations: (1) The color mark sensor never receives the existence signal of the anti-counterfeiting seal, and it is determined that there is no anti-counterfeiting seal; (2) After a delay of 60 ms (60 ms is approximately the time required for the cigarette rod to pass the length of one seal), continue to read the signal of the color mark sensor. If the anti-counterfeiting seal does not exist, it indicates that the pasting position of the anti-counterfeiting seal is correct, and it is determined to be qualified; (3) After a delay of 60 ms, the color mark sensor still detects the anti-counterfeiting seal, then it is determined that the seal is overlapped or there are multiple anti-counterfeiting seals, which is unqualified. In addition, if within the signal duration detected by the synchronous photoelectric sensor 1 or 2 within the travel time of one carton, the color mark sensor has at least one jump signal: such as jumping from existence (1) to non-existence (0) and then jumping back to existence (1), it is determined that there are discontinuous multiple anti-counterfeiting seals, which is unqualified. The unqualified cigarette rods will be removed at the removal port at the end of the conveyor belt.

[0037] The beneficial technical effects of the present invention compared with the prior art:

[0038] (1) After installing the quality detection system for the anti-counterfeiting seal of the cigarette carton provided by the present invention on the YB621D gift box cigarette packaging machine, the machine runs well, and can automatically remove the cigarette cartons with quality problems of the seal such as no seal, double seals, single seal ahead, single seal lag, multiple non-overlapping seals, multiple overlapping seals less than 1 / 2 seal, etc., ensuring the accuracy of the quality detection of the anti-counterfeiting label.

[0039] (2) The present invention effectively guarantees the quality of carton cigarettes, preventing carton cigarettes with defective seals from still being mixed into the finished products. It reduces or even eliminates the inflow of carton cigarettes with seal quality problems into the next process at the source, and promptly removes unqualified carton cigarettes, greatly reducing material waste.

[0040] (3) The present invention improves the production efficiency of the equipment, reduces the labor intensity of the staff, and is conducive to the control of labor costs. The quality detection system for the anti-counterfeiting seal of cigarette cartons of the present invention has a simple structure, ingenious design, is easy to disassemble, adjust, and maintain, can achieve multi-dimensional adjustment, and is easy to be widely applied to different specifications of cigarettes. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic structural diagram of the working principle of the present invention;

[0042] Figure 2 It is a schematic structural diagram of the control system of the present invention;

[0043] Figure 3 One of the three-dimensional diagrams of the structure of the quality detection system for the anti-counterfeiting seal of cigarette cartons of the present invention;

[0044] Figure 4 Another three-dimensional diagram of the structure of the quality detection system for the anti-counterfeiting seal of cigarette cartons of the present invention;

[0045] Figure 5 It is a schematic installation diagram of the structure of the quality detection system for the anti-counterfeiting seal of cigarette cartons of the present invention;

[0046] Figure 6 It is a schematic diagram of the starting state in the quality detection method for the anti-counterfeiting seal of a cigarette carton of the present invention;

[0047] Figure 7 It is a schematic diagram of the unqualified state where the anti-counterfeiting seal is ahead in the quality detection method for the anti-counterfeiting seal of a cigarette carton of the present invention;

[0048] Figure 8 It is a schematic diagram of the unqualified state where the anti-counterfeiting seal lags behind in the quality detection method for the anti-counterfeiting seal of a cigarette carton of the present invention;

[0049] Figure 9 It is a schematic diagram of the unqualified state where the anti-counterfeiting seal is not pasted in the quality detection method for the anti-counterfeiting seal of a cigarette carton of the present invention;

[0050] Figure 10 It is a schematic diagram of the qualified state of the anti-counterfeiting seal in the quality detection method for the anti-counterfeiting seal of a cigarette carton of the present invention;

[0051] Figure 11Schematic diagram of the unqualified state of the overlapping of the anti-counterfeiting seal for a cigarette carton in the quality inspection method of the present invention;

[0052] Wherein: 1 - cigarette conveyor belt, 2 - color mark sensor, 3 - L-shaped mounting plate, 4 - first photoelectric switch, 5 - second photoelectric switch, 6 - horizontal mounting piece, 7 - L-shaped mounting base, 8 - I-shaped base, 9 - adjustable vertical plate, 10 - adjustable horizontal plate, 11 - cigarette conveyor channel bracket, 12 - cigarette carton, 13 - anti-counterfeiting seal. Specific implementation manner

[0053] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with specific implementation manners and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0054] Embodiment 1: On the side of the cigarette conveyor channel through which the cigarette carton 12 passes, a color mark sensor 2 and the first and second photoelectric switches 5 are installed to detect the passing cigarette cartons 12. Specifically, the arrangement distance between the first photoelectric switch 4 and the second photoelectric switch 5 is equal to the length of an anti-counterfeiting seal 13; the distance between the position where the color mark sensor 2 is set and the first photoelectric switch 4 should consider the conveying speed of the cigarette conveyor belt 1, so that when the front end of the cigarette carton 12 is detected by the first photoelectric switch 4, the pasting position of the anti-counterfeiting seal 13 on the side wall of the qualified cigarette carton 12 just enters the detection range of the color mark sensor 2.

[0055] When the cigarette carton 12 passes through the color mark sensor 2, the color mark sensor 2 will detect its color. If there is an abnormal color difference, the seal time information at this time will be recorded. At the same time, the two photoelectric switches will also record the time information when the cigarette carton 12 passes through them.

[0056] Within a detection working cycle, compare the just-obtained seal time information with the time information recorded by the photoelectric switches. If the seal time information is earlier than the first passing time information, it means that the anti-counterfeiting seal 13 is ahead, and at this time, this cigarette carton is determined to be unqualified; if the seal time information is later than the second passing time information, it will also be determined to be an unqualified seal.

[0057] Within a detection working cycle, if it is found that the seal time information is later than the first passing time information but earlier than the second passing time information, first record this information, and then after a set time value, collect the detection result of the color mark sensor 2 again to determine whether the anti-counterfeiting seal 13 exists at this time. If it does not exist, it indicates that the pasting position of the anti-counterfeiting seal 13 is correct and is determined to be a qualified seal; otherwise, it is determined to be an unqualified seal.

[0058] Finally, all the anti-counterfeiting seals 13 determined to be unqualified are removed.

[0059] During the execution of the above steps, the color mark sensor 2 continuously detects the cigarette carton 12. Once a jump signal occurs in the detection result for no less than once, and the time when the jump signal occurs is within the time range of one carton passing after the first photoelectric switch 4 or the second photoelectric switch 5 detects the cigarette carton 12, it will be determined as an unqualified multi-anti-counterfeiting seal 13.

[0060] Embodiment 2: A quality detection system for the anti-counterfeiting seal 13 of a cigarette carton 12. The quality detection system for the anti-counterfeiting seal 13 of a cigarette carton 12 according to the present invention mainly includes devices such as a color mark sensor 2, a multi-dimensionally adjustable mounting bracket for the color mark sensor 2, two synchronous signal photoelectric switches, an adjustable mounting bracket for the synchronous signal photoelectric switches, and a control unit.

[0061] The color mark sensor 2 is of the LEUZE color mark sensor 2KRT18BM.V5 / L6T-M12 type, which can detect even if there are slight differences in the background color, has a fast processing speed, automatically adapts to the wavelength, and can detect small differences in gray values, regardless of the mixed color of the label and the background.

[0062] The color mark sensor 2 is mounted on the multi-dimensionally adjustable mounting bracket for the color mark sensor 2, and the detection distance, detection height, and detection angle can be adjusted when necessary.

[0063] The multi-dimensionally adjustable mounting bracket for the color mark sensor 2 includes an L-shaped mounting plate 3, an adjustable horizontal plate 10, an adjustable vertical plate 9, and an I-shaped base 8.

[0064] The L-shaped mounting plate 3 has an "L-shaped" structure. There are two through holes for mounting the color mark sensor 2 on the vertical mounting plate, and a horizontal through slot for adjusting the left and right mounting positions is provided.

[0065] The color mark sensor 2 is fixedly connected to the L-shaped mounting plate 3 through a fastening bolt.

[0066] The front end of the adjustable horizontal plate 10 is provided with two threaded holes for mounting the L-shaped mounting plate 3, and two horizontal through slots for adjusting the front and back mounting positions are provided on the main surface.

[0067] The L-shaped mounting plate 3 and the adjustable horizontal plate 10 are perpendicular to each other and are fixedly connected through a fastening bolt.

[0068] The upper end of the adjustable vertical plate 9 is provided with two threaded holes for mounting the vertical mounting plate, and two vertical through slots for adjusting the up and down mounting positions are provided on the main view surface.

[0069] The adjustable horizontal plate 10 and the adjustable vertical plate 9 are perpendicular to each other and are fixedly connected through a fastening bolt.

[0070] The I-shaped base 8 has an "I-shaped" structure, is provided with two threaded holes for installing the adjustable vertical plate 9, and is provided with through holes for two to be installed on the cigarette conveying channel bracket 11.

[0071] The I-shaped base 8 is perpendicular to the adjustable vertical plate 9 and is fixedly connected by fastening bolts. The I-shaped base 8 is perpendicular to the cigarette conveying channel bracket 11 and is fixedly connected by fastening bolts.

[0072] The synchronous signal photoelectric switch is the Corel photoelectric switch PH-Q23-A3-030 type. This photoelectric switch has good anti-interference ability and strong anti-vibration stability, meeting the production process requirements.

[0073] Two synchronous signal photoelectric switches are installed on the photoelectric switch adjustable mounting bracket, and the detection distance can be adjusted when necessary.

[0074] The synchronous signal photoelectric switch adjustable mounting bracket includes a horizontal mounting plate 6 and an L-shaped mounting base 7.

[0075] The horizontal mounting plate 6 is provided with four through holes for installing the synchronous signal photoelectric sensor, ensuring that the mounting distance between the two synchronous signal photoelectric switches and the distance between the light sources of the synchronous signal photoelectric sensors are the length of one anti-counterfeiting seal 13. The length of one anti-counterfeiting seal 13 is 32.5 mm.

[0076] The L-shaped mounting base 7 has an "L-shaped" structure. There is a horizontal through groove for placing the horizontal mounting plate 6 on the upper surface of the L-shaped mounting base 7, and through holes for two to be installed on the cigarette conveying channel bracket 11 on the side.

[0077] The synchronous signal photoelectric switch, the horizontal mounting plate 6 and the L-shaped mounting base 7 are fixedly connected by fastening bolts, and the L-shaped mounting base 7 and the cigarette conveying channel bracket 11 are fixedly connected by fastening bolts.

[0078] During installation, ensure that the distance between the light source of the color mark sensor 2 and the light source of the first synchronous signal photoelectric sensor is 90 mm, which is the right edge of the pasting position of the anti-counterfeiting seal 13 on the cigarette carton 12.

[0079] The control unit is the YB621D in-box machine IPC. The cigarette strips detected as unqualified will be shifted and will be removed by the removal mechanism when receiving the signal from the removal sensor.

[0080] The described color mark sensor 2, the photoelectric sensor and the YB621D in-box IPC are electrically connected.

[0081] During actual use:

[0082] After the strip carton is affixed with an anti-counterfeiting seal by the labeling machine, it advances along the strip cigarette conveyor belt in the running direction. If the color mark sensor detects the presence signal of the anti-counterfeiting seal before the cigarette strip reaches the synchronous optoelectronic switch 1, it is determined that the anti-counterfeiting seal is ahead. On the contrary, if the color mark sensor still detects the presence signal of the anti-counterfeiting seal after the front end of the cigarette strip passes through the synchronous optoelectronic switch 2, it is determined that the anti-counterfeiting seal is lagging. If the front end of the cigarette strip passes through the synchronous optoelectronic switch 1 and has not reached the synchronous optoelectronic switch 2, and the color mark sensor detects the presence of the anti-counterfeiting seal, it is further divided into the following situations: (1) If the color mark sensor never receives the presence signal of the anti-counterfeiting seal, it is determined that there is no anti-counterfeiting seal; (2) After a delay of 60 ms (60 ms is approximately the time required for the cigarette strip to pass the length of one seal), continue to read the signal of the color mark sensor. If the anti-counterfeiting seal does not exist, it indicates that the pasting position of the anti-counterfeiting seal is correct and is determined to be qualified; (3) After a delay of 60 ms, if the color mark sensor still detects the anti-counterfeiting seal, it is determined that the seal is overlapped or there are multiple anti-counterfeiting seals, which is unqualified. In addition, if the color mark sensor has at least one jump signal within the signal duration detected by the synchronous optoelectronic sensor 1 or 2 within the travel time of one strip carton: for example, from existence (1) to non-existence (0) and then to existence (1), it is determined that there are discontinuous multiple anti-counterfeiting seals, which is unqualified. The unqualified cigarette strips will be removed at the removal port at the end of the conveyor belt.

[0083] It should be understood that the above specific embodiments of the present invention are only used for exemplary illustration or explanation of the principle of the present invention, and do not constitute a limitation to the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundary of the appended claims, or equivalent forms of such scope and boundary.

Claims

1. A method for detecting the quality of anti-counterfeiting seals of cigarette cartons, characterized in that The following steps are involved: Step S1, identifying and detecting cigarette cartons passing horizontally at the side of the cigarette conveying passage through which the cigarette cartons pass, and respectively setting a color mark sensor, a No. 1 photoelectric switch, and a No. 2 photoelectric switch along the traveling direction; the spacing between the detection points of the No. 1 photoelectric switch and the No. 2 photoelectric switch is equal to the length of an anti-counterfeiting seal; the color mark sensor is set at a position so that the spacing between its detection points and the No. 1 photoelectric switch is adapted to the conveying speed of the cigarette conveyor belt, so that when the front end of the cigarette cartons is detected by the No. 1 photoelectric switch, the anti-counterfeiting seal on the side wall of the qualified cigarette cartons is just within the detection range of the color mark sensor; Step S2, the color mark sensor performs color recognition on the detection object passing by. When there is a color difference, the sealing time information can be recorded to determine that the anti-counterfeiting seal is detected. It can also make a detection to determine whether there is a seal at a certain time; when the No. 1 photoelectric switch and the No. 2 photoelectric switch detect the cigarette box, the No. 1 passing time information and the No. 2 passing time information are recorded; Step S3, within a detection working cycle, if the sealing time information is earlier than the No. 1 passing time information, it is determined that the anti-counterfeiting seal is ahead of schedule; if the sealing time information is later than the No. 2 passing time information, it is determined that the anti-counterfeiting seal is delayed or there is no anti-counterfeiting seal, and it is determined to be an unqualified seal; Step S4, within a detection working cycle, if the sealing time information is later than the No. 1 elapsed time information but earlier than the No. 2 elapsed time information, then after a predetermined delay time value, the detection result of the color mark sensor is obtained again to determine whether the anti-counterfeiting seal exists after the predetermined delay time. If not, it indicates that the anti-counterfeiting seal is pasted in the correct position and is determined to be a qualified seal; if present, it indicates that the anti-counterfeiting seal is overlapped or multiple anti-counterfeiting seals are pasted, and is determined to be an unqualified seal; Step S5: discard the seals that are judged to be unqualified.

2. The quality inspection method for the anti-counterfeiting seal of a cigarette carton according to claim 1, characterized in that: In step S3, the color mark sensor continuously detects the cigarette carton. If the detection result of the color mark sensor produces a jump signal at least once, and the time of the jump signal occurs after the No. 1 photoelectric switch or the No. 2 photoelectric switch detects the cigarette carton and within the time range of a carton passing, it is determined to be a discontinuous multiple anti-counterfeiting seal and an unqualified seal.

3. A quality inspection system for anti-counterfeiting seals of cigarette cartons, characterized in that include: Installed on the cigarette conveying channel bracket and the cigarette conveyor belt, it is used to detect the quality of the anti-counterfeiting seals on the cigarette cartons passing on the cigarette conveyor belt. A color mark sensor is placed on the first adjustable mounting bracket and connected to the control unit so that the color mark sensor faces the side wall of the cigarette carton passing on the cigarette carton conveyor belt, and is used to transmit a signal of detecting the presence of the anti-counterfeit seal to the control unit; Photoelectric switch No. 1 and photoelectric switch No. 2 are sequentially mounted on the second mounting bracket along the conveying direction, so that photoelectric switch No. 1 and photoelectric switch No. 2 are directly facing the side wall of the cigarette carton passing on the cigarette carton conveyor belt, and are connected to the control unit to detect the time signal of the front end of the cigarette carton reaching the cigarette carton, and send it to the control unit; the distance between the detection points of photoelectric switch No. 1 and photoelectric switch No. 2 is equal to the length of an anti-counterfeiting seal; The distance between the detection points of the color mark sensor and the No. 1 photoelectric switch is adapted to the conveying speed of the cigarette conveyor belt, so that when the front end of the cigarette carton enters between the No. 1 photoelectric switch and the No. 2 photoelectric switch, the anti-counterfeiting seal on the side wall of the qualified cigarette carton is just within the detection range of the color mark sensor; The control unit is connected to the color mark sensor, the first photoelectric switch and the second photoelectric switch, and is used to judge whether the anti-counterfeiting seal is qualified based on the signal of the existence of the anti-counterfeiting seal and the time signal when the front end of the cigarette box reaches the photoelectric switch, and output the quality inspection result of the anti-counterfeiting seal of the cigarette box.

4. The quality inspection system for anti-counterfeit seals of cigarette cartons according to claim 3, characterized in that: The straight line where the No. 1 photoelectric switch and the No. 2 photoelectric switch are located is parallel to the straight line where the cigarette conveyor belt is located; the horizontal height where the color mark sensor, No. 1 photoelectric switch and No. 2 photoelectric switch are located is equal to the horizontal height where the anti-counterfeiting seal standard on the side wall of the cigarette box is located.

5. The quality inspection system for anti-counterfeit seals of cigarette cartons according to claim 3, characterized in that: The first adjustable mounting bracket comprises: An I-shaped base, one end of which is mounted on the side wall of the cigarette conveying channel bracket and the other end is connected to the adjustable vertical plate, and is used to install and support the entire first adjustable mounting bracket; The adjustable vertical plate is vertically mounted on the I-shaped base and forms a movable connection, and can adjust the height in the vertical direction, and is used to connect and support the adjustable horizontal plate; The adjustable horizontal plate is movably mounted on the upper end of the adjustable vertical plate and can adjust the horizontal spacing relative to the cigarette conveyor belt in the horizontal direction. The L-shaped mounting plate is installed on the side of the adjustable horizontal plate close to the cigarette conveyor belt and is used to install the color mark sensor.

6. The quality inspection system for anti-counterfeit seals of cigarette cartons according to claim 3, characterized in that: The L-shaped mounting plate is a horizontally placed "L-shaped" structure, and a through hole for mounting the color mark sensor is provided on the horizontal surface. The color mark sensor is fixedly connected to the L-shaped mounting plate by fastening bolts; The adjustable horizontal plate is provided with a horizontal through slot for adjusting the installation position in the horizontal direction; the upper end of the adjustable vertical plate is provided with a vertical screw that can be inserted into the horizontal through slot, and the vertical screw can be fastened and connected to the adjustable horizontal plate by locking with a fastening nut; the adjustable horizontal plate can be adjusted in a horizontal translation relative to the vertical screw in the horizontal through slot; The plate surface of the adjustable vertical plate is provided with a vertical through groove; the outer end of the I-shaped base is provided with a transverse screw, which is inserted into the vertical through groove and can be fastened and connected with the adjustable vertical plate by tightening the screw nut; the adjustable vertical plate can be adjusted vertically in height relative to the I-shaped base in the vertical through groove.

7. The quality inspection system for anti-counterfeit seals of cigarette cartons according to claim 3, characterized in that: The second mounting bracket comprises: An L-shaped mounting base, wherein a mounting hole is provided on the vertical surface of the L-shaped mounting base, and the mounting base is fixedly mounted on the side wall of the cigarette conveying channel bracket by fastening bolts passing through the mounting holes; The horizontal mounting plate is installed on the horizontal surface of the L-shaped mounting base and is used to install the No. 1 photoelectric switch and the No. 2 photoelectric switch.

8. The quality inspection system for anti-counterfeit seals of cigarette cartons according to claim 3, characterized in that: The control unit determines whether the anti-counterfeiting seal is qualified, including: within a detection working cycle, if the sealing time information is earlier than the No. 1 passing time information, it is determined that the anti-counterfeiting seal is advanced; if the sealing time information is later than the No. 2 passing time information, it is determined that the anti-counterfeiting seal is delayed or there is no anti-counterfeiting seal, and it is determined to be an unqualified seal; Within a detection working cycle, if the sealing time information is later than the elapsed time information No. 1 but earlier than the elapsed time information No. 2, then after the preset delay time value, the detection result of the color mark sensor is obtained again to determine whether the anti-counterfeiting seal exists after the preset delay time. If not, it indicates that the anti-counterfeiting seal is pasted in the correct position and is judged to be a qualified seal; if present, it indicates that the anti-counterfeiting seal is overlapped or there are multiple anti-counterfeiting seals pasted and it is judged to be an unqualified seal.

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