Cigarette-penetrating and bale-breaking detecting and removing system of cigarette packer

Abstract

The invention discloses a cigarette-penetrating and bale-breaking detecting and removing system for a cigarette packer. The system comprises a conveying push head; the proximity switch is arranged on one side of the conveying push head; the conveying station is fixedly connected with the conveying push head; the laser detector is arranged on one side of the conveying station, the first removing station is fixedly connected with the conveying station, and the second removing station is fixedly connected with the first removing station; the collecting station is arranged on one side of the first removing station and the second removing station; the optical fiber detector is arranged on the collecting station; the controller is electrically connected with the proximity switch, the laser detector, the optical fiber detector, the first removing station and the second removing station; and after the conveying push head pushes the strip-through bale to the conveying station, the controller obtains defect identification information of the laser detector. Bulk cigarette cartons can be automatically detected without manual intervention, and the product quality is improved. When the equipment produces strip-through bale-breaking quality defective products, the equipment can automatically identify and reject the defective products and give an alarm for reminding.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging equipment, and in particular to a cigarette packaging machine's loose pack detection and rejection system. Background Art

[0002] The ZB45 packaging machine consists of four parts: the YB45 (small rigid box packaging equipment), the YB55 (small transparent box packaging equipment), the YB65 (strip rigid box packaging equipment), and the YB95 (strip transparent packaging equipment). The YB95's function is to cut rolls of transparent plastic paper into equal-length strips of transparent packaging paper. These strips are then packaged into neatly arranged transparent cigarette strips through conveying, folding, wrapping, and ironing. During this packaging process, problems such as uneven cutting, improper conveying, loose wrapping, and wrinkles during ironing can lead to varying degrees of quality defects in the transparent packaging. The most serious quality defect is loose packs. These loose packs can have a significant negative impact on brand quality. Currently, loose pack detection systems typically use contact-based mechanical sensing detection units to provide a loose pack alarm. This function suffers from low sensitivity, crude design, low accuracy, and a lack of automatic rejection. Once YB95 produces defective products in loose packages, the equipment cannot detect and remove the defective products in a timely and accurate manner. The defective products will directly flow into the next link, causing huge quality risks to the product. Summary of the Invention

[0003] In view of the above, the present invention aims to provide a cigarette packaging machine loose pack detection and rejection system to solve the above-mentioned technical problems.

[0004] The technical solution adopted in the present invention is as follows:

[0005] The present invention provides a cigarette packing machine loose pack detection and rejection system, comprising:

[0006] Conveying push head;

[0007] A proximity switch provided on one side of the conveying pusher head;

[0008] A conveying station fixedly connected to the conveying push head;

[0009] A laser detector disposed on one side of the conveying station;

[0010] a first rejecting station fixedly connected to the conveying station;

[0011] a second reject station fixedly connected to the first reject station;

[0012] A collecting station is provided on one side of the first rejecting station and the second rejecting station;

[0013] An optical fiber detector provided on a collection station;

[0014] A controller electrically connected to the proximity switch, the laser detector, the optical fiber detector, the first reject station, and the second reject station;

[0015] After the conveying push head pushes the strip transparent bulk bag to the conveying station, the controller obtains the defect recognition information of the laser detector; when the laser detector identifies the strip transparent bulk bag with defects, the controller detects that the conveying push head has moved a preset number of times, and then the controller controls the first rejection station to start the rejection action; when the optical fiber detector detects that the strip transparent bulk bag with defects is at the collection station, the rejection is ended; when the optical fiber detector detects that the strip transparent bulk bag is not at the collection station, the second rejection station is controlled to start the rejection action.

[0016] Optionally, the control circuit includes:

[0017] A first relay, a second relay, a third relay, a first electromagnetic valve, a second electromagnetic valve, and an audible and visual alarm are connected in parallel.

[0018] Optionally, the first reject station includes:

[0019] First reject cylinder;

[0020] a reject flap fixedly connected to the first reject cylinder;

[0021] The first reject cylinder is electrically connected to the first solenoid valve.

[0022] Optionally, the second rejection station includes:

[0023] Second rejection cylinder;

[0024] The second reject cylinder is electrically connected to the second solenoid valve.

[0025] Optionally, the first solenoid valve is electrically connected to the control circuit via a first coil.

[0026] Optionally, the second solenoid valve is electrically connected to the control circuit via a second coil.

[0027] Optionally, the sound and light alarm is electrically connected to the control circuit via a third coil.

[0028] Optionally, the controller includes:

[0029] A first output interface, a second output interface, a third output interface, a first receiving interface, a second receiving interface, and a third receiving interface;

[0030] The first output interface is electrically connected to the first relay;

[0031] The second output interface is electrically connected to the second relay;

[0032] The third output interface is electrically connected to the third relay;

[0033] The first receiving interface is electrically connected to the proximity switch;

[0034] The second receiving interface is electrically connected to the laser detector;

[0035] The third receiving interface is electrically connected to the optical fiber detector.

[0036] The present invention also provides a method for detecting and rejecting loose packs of cigarette packing machines, which is applied to the above-mentioned loose pack detection and rejection system of cigarette packing machines. The method comprises:

[0037] After the conveying pusher pushes the strip transparent bulk package to the conveying station, the controller obtains the defect recognition information of the laser detector;

[0038] When the laser detector identifies a defective loose bag, the controller detects that the conveying push head has moved a preset number of times, and then controls the first rejection station to start the rejection action;

[0039] When the optical fiber detector detects that the defective strip package is in the collection station, it is removed;

[0040] When the optical fiber detector detects that the loose package is not in the collecting station, the second rejecting station is controlled to start the rejecting action.

[0041] The above solution of the present invention includes at least the following beneficial effects:

[0042] The above-mentioned scheme of the present invention includes: a conveying push head; a proximity switch arranged on one side of the conveying push head; a conveying station fixedly connected to the conveying push head; a laser detector arranged on one side of the conveying station, a first rejecting station fixedly connected to the conveying station, and a second rejecting station fixedly connected to the first rejecting station; a collection station arranged on one side of the first rejecting station and the second rejecting station; an optical fiber detector arranged on the collection station; a controller electrically connected to the proximity switch, the laser detector, the optical fiber detection, the first rejecting station, and the second rejecting station; after the conveying push head pushes the strip transparent bulk bag to the conveying station, the controller obtains defect recognition information of the laser detector; when the laser detector identifies a strip transparent bulk bag with defects, the controller controls the first rejecting station to start a rejecting action after detecting that the conveying push head has moved a preset number of times; when the optical fiber detector detects that the strip transparent bulk bag with defects is in the collecting station, the rejecting is ended; when the optical fiber detector detects that the strip transparent bulk bag is not in the collecting station, the second rejecting station is controlled to start a rejecting action. The solution of the present invention can automatically inspect loose-packed cigarettes without manual intervention, thus increasing costs and improving the detection function of existing equipment without affecting the original machine function, thereby improving product quality. When the equipment produces defective loose-packed cigarettes, it can automatically identify and issue an alarm, and then shift the packaging machine's exit position to remove the defective products. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described below with reference to the accompanying drawings, in which:

[0044] Figure 1 This is a structural diagram of a system for detecting and rejecting loose packs on a cigarette packaging machine provided by an embodiment of the present invention.

[0045] Figure 2 A schematic structural diagram of a control circuit provided in an embodiment of the present invention.

[0046] Figure 3 A schematic diagram of the structure of a controller provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0047] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0048] The present invention proposes an embodiment of a system for detecting and rejecting loose packs of cigarette packing machines. Specifically, Figure 1 shown, including:

[0049] Conveying push head 1;

[0050] A proximity switch 11 is provided on one side of the conveying push head 1;

[0051] A conveying station 2 fixedly connected to the conveying push head 1;

[0052] A laser detector 21 provided on one side of the conveying station 2;

[0053] A first rejecting station 31 fixedly connected to the conveying station 2;

[0054] A second reject station 32 fixedly connected to the first reject station;

[0055] A collection station provided on one side of the first reject station and the second reject station 32;

[0056] An optical fiber detector 4 is provided on the collection station;

[0057] A controller electrically connected to the proximity switch 11, the laser detector 21, the optical fiber detector 4, the first reject station 31, and the second reject station 32;

[0058] In this embodiment, the conveying pusher 1, the conveying station 2, the first rejection station 31, and the second rejection station 32 are connected in sequence to form a loose-packed cigarette conveying and rejection production line. The collection station is arranged below the first rejection station 31 and the second rejection station 32 to collect the rejected defective loose-packed cigarettes. A proximity switch 11 is fixedly provided on the side of the conveying pusher 1 for detecting movement. A laser detector 21 is provided on one side of the conveying station 2. When the wrinkled cellophane of the loose-packed cigarette pack is lifted up and blocks the laser detection of the loose pack, the laser detector 21 generates a detection signal. A fiber optic detector 4 is provided at the bottom of the collection station to detect whether the defective loose-packed cigarettes have been rejected to the collection station. If the fiber optic detector 4 generates a detection signal, it means that the rejection has been successful; if the fiber optic detector 4 does not generate a detection signal, it means that the rejection has failed.

[0059] The packaging process of loose cigarettes is from left to right, with the conveying push head 1 pushing to the right and then returning to the left to realize the function of conveying the loose cigarettes to the right. It should be emphasized that the push head works in a left-right reciprocating motion, with the stroke being one loose cigarette pack at a time. After the conveying push head 1 pushes the loose cigarette pack onto the conveying station 1, the controller obtains the defect identification information of the laser detector 21; when the laser detector 21 identifies a defective loose cigarette pack, the controller detects the preset number of movements of the conveying push head 1, and then controls the first rejection station 31 to start the rejection action; when the optical fiber detector 4 detects that the defective loose cigarette pack is in the collection station, the rejection ends; when the optical fiber detector 4 detects that the loose cigarette pack is not in the collection station, it controls the second rejection station 32 to start the rejection action.

[0060] This embodiment of the cigarette packaging machine's loose-pack detection and rejection system automatically detects loose-packed cigarettes without manual intervention, thus minimizing costs and compromising the original machine's functionality. It improves the detection capabilities of existing equipment and enhances product quality. When the equipment produces loose-packed cigarettes with loose-packed cigarettes, it automatically identifies and issues an alarm, then removes the defective products by moving them to the packaging machine's exit.

[0061] like Figure 2 As shown, the control circuit includes:

[0062] The first relay K1, the second relay K2, the third relay K3, the first solenoid valve Y1, the second solenoid valve Y2, and the sound and light alarm H1 are connected in parallel.

[0063] The control circuit connects the controller and the first rejecting station 31, the second rejecting station 32, the proximity switch 11, the laser detector 21, the optical fiber detector 4, and the sound and light alarm H1.

[0064] The first reject station 31 includes a first reject cylinder; a reject flap fixedly connected to the first reject cylinder; and a first solenoid valve Y1 electrically connected to the control circuit via a first coil L1. When the first coil L1 is energized, the first solenoid valve Y1's air circuit is open, executing the reject action. The first reject cylinder opens the reject flap, rejecting defective loose cigarettes to the collection station.

[0065] The second rejection station 32 includes a second rejection cylinder electrically connected to a second solenoid valve Y2. The second solenoid valve Y2 is electrically connected to the control circuit via a second coil L2. When the second coil L2 is energized, the second solenoid valve Y2 is opened, performing a secondary rejection operation. The second rejection cylinder pushes unrejected loose cigarettes out of the rejection station and drops them into the collection station.

[0066] The sound and light alarm H1 is electrically connected to the control circuit via the third coil L3. If the loose cigarette pack rejection fails, the third coil L3 is energized, and the sound and light alarm H1 is turned on, emitting a sound and light alarm.

[0067] like Figure 3 As shown, the controller includes:

[0068] The first output interface Q0, the second output interface Q1, the third output interface Q2, the first receiving interface I1, the second receiving interface I2, the third receiving interface I3; the controller here adopts PLC.

[0069] Among them, the first output interface Q0 is electrically connected to the first relay K1; the second output interface Q1 is electrically connected to the second relay K2; the third output interface Q2 is electrically connected to the third relay K3; the first receiving interface I1 is electrically connected to the proximity switch 11; the second receiving interface I2 is electrically connected to the laser detector 21; and the third receiving interface I3 is electrically connected to the optical fiber detector 4.

[0070] The controller is equipped with multiple bit memories. When the pusher head 1 receives the pusher head synchronization signal, the bit memory A1 records 1. When the synchronization signal disappears, the bit memory A1 records 0. There is a period of time (about 0.5s) between the pusher head 1 moving to the in-position proximity switch and leaving. During this period of time, A1 remains at 1.

[0071] When the laser detector 21 is not blocked by the folds of the transparent cellophane, no output is given, and the bit memory A2 is recorded as 0. When blocked by the folds of the transparent cellophane, the bit memory A2 is recorded as 1.

[0072] When the system equipment is running, the running signal is transmitted to the memory A3, and A3 records 1 at this time. When the system equipment stops running, the memory A3 records 0.

[0073] When a defective cigarette is detected, an alarm and rejection command is generated. This command is stored in the bit memory A4, and A4 is recorded as 1;

[0074] When a defective cigarette carton alarm signal is generated, bit memory A5 is 1. When the proximity switch 11 is sensed once, A5 is incremented by 1. When bit memory A5 is accumulated to 16, the defective cigarette carton is moved to the rejection station and the rejection command is executed.

[0075] After a defective cigarette is rejected, fiber detector 4 triggers a rejection confirmation signal. While this signal is present, bit memory A6 records a 1, clearing A4 and returning it to a 0. When this signal disappears, bit memory A6 returns to a 0. After the reject command is executed, if the rejection confirmation signal is not generated, bit memory A6 records a 0. At this point, A4 is compared with A6 to determine that the defective cigarette has failed to be rejected, and the system equipment is shut down.

[0076] An embodiment of the present invention further provides a method for detecting and rejecting loose packs of cigarette packing machines, which is applied to the loose pack detection and rejection system of the cigarette packing machines in the above embodiment. The method comprises:

[0077] S11: After the conveying pusher pushes the strip-transparent bulk package to the conveying station, the controller obtains the defect recognition information of the laser detector;

[0078] S12: When the laser detector identifies a defective loose bag, the controller controls the first rejection station to start the rejection action after detecting the preset number of times the conveying push head moves;

[0079] S13, when the optical fiber detector detects that the defective strip package is in the collection station, it is removed;

[0080] S14. When the optical fiber detector detects that the loose package is not in the collecting station, the second rejecting station is controlled to start the rejecting action.

[0081] Specifically, proximity switch 11 provides a pusher synchronization signal for conveyor pusher 1. The generation of the pusher synchronization signal serves as a command for the detection system to be ready. When the pusher synchronization signal is generated, bit memory A1 of the controller records 1. When the pusher synchronization signal disappears, bit memory A1 records 0. There is a period of time (approximately 0.5 seconds) between the time when conveyor pusher 1 moves to proximity switch 11 and when it leaves, during which time A1 remains at 1.

[0082] The wrinkled cellophane of loose cigarette cartons lifts up, blocking the laser detector 21 and generating a detection signal. When the laser detector 21 is not blocked by the wrinkled cellophane, no output is generated, and bit memory A2 records a value of 0. When the laser detector 21 is blocked by the wrinkled cellophane, bit memory A2 records a value of 1. When a defective cigarette carton is detected, an alarm and rejection command is generated, which is stored in bit memory A4, and A4 records a value of 1.

[0083] The rejection shift memory provides the shift operation steps for defective cigarette rejection. When a defective cigarette alarm signal is generated, bit memory A5 is 1. When the push head proximity switch is sensed once, A5 is incremented by 1. When bit memory A5 accumulates to 16, the defective cigarette is transported to the rejection area and the rejection command is executed.

[0084] When a defective cigarette carton is removed and falls, fiber optic detector 4 triggers a rejection confirmation signal. While this signal is present, bit memory A6 records a 1, clearing A4 and setting A4 to 0. When this signal disappears, bit memory A6 records a 0. The rejection confirmation signal closes the loop of the entire bulk pack inspection system, ensuring the accurate rejection of defective cigarette cars.

[0085] After the rejection command is executed, if the rejection confirmation signal is not generated, bit memory A6 records 0. At this time, A4 is compared with A6 to determine that the defective cigarette strips have failed to be rejected, and the system equipment is controlled to shut down.

[0086] When the comparison result of A4 and A6 is rejection failure, bit memory A7 starts recording. When the push head proximity switch senses again, A7 increases by 1. The secondary rejection station is designed to be right after the first rejection station, so when A7 records 1, the secondary rejection instruction is executed.

[0087] The working principle of program control signal transmission is as follows:

[0088] like Figure 2 and Figure 3In the figure, 11 is a proximity switch, 21 is a laser sensor, 4 is a fiber optic detector, and the controller PLC is a Siemens S7-200. The power supply for the proximity switch 1, laser sensor 21, fiber optic detector 4, and controller is DC24V. When the conveying push head 1 moves to the synchronization position, the proximity switch 11 emits a PNP high-level output signal 1 and transmits this signal 1 to the PLC input module I1. The wrinkled cellophane of the loose tobacco pack blocks the laser sensor 21, and the laser sensor 21 emits a PNP high-level output signal 2 and transmits this signal 2 to the PLC input module I2. When a defective tobacco rod is conveyed to the rejection station, it is immediately rejected. The defective tobacco rod falls to the collection station and is detected by the fiber optic detector 4. The fiber optic detector 4 emits a PNP high-level output signal 3 and transmits this signal 3 to the PLC input module I3. The system equipment is detected at startup, and the operation signal is transmitted to the PLC input module.

[0089] The working principle of the control signal output execution part of the controller is as follows:

[0090] After a defective cigarette triggers the controller to initiate the determination process, the controller calculates the position of the defective cigarette. When the defective cigarette reaches the first rejection station, the controller issues a rejection command to the output module. The output module then outputs the rejection command 1 to the second relay K2 via the Q1 interface. This, combined with the DC0V, controls the first coil L1 to energize, thereby connecting the normally open contact of the first coil L1. The DC24V passes through the normally open contact to the first solenoid valve Y1, which, combined with the DC0V, controls the rejection air circuit, executing the rejection action.

[0091] If a rejection confirmation signal is not generated within 0.5 seconds after a rejection command is generated, the controller will perform two steps. First, the controller outputs a stop signal, causing the equipment to shut down. It also transmits a rejection failure alarm signal through output module Q0, sending the alarm command to first relay K1. This, combined with DC0V, controls the third coil L3 to energize, thereby connecting the normally open contact of third coil L3. DC24V passes through the normally open contact to the sound and light alarm H1, which, combined with DC0V, generates an audible and visual alarm, reminding the operator to check product quality.

[0092] Second, the controller generates a secondary rejection shift instruction. After the shift, the rejection instruction 2 is output to the third relay K3 through the output module Q2, and combined with DC0V to control the second coil L2 to be attracted, so that the normally open contact of the second coil L2 is connected, and the air circuit of the second solenoid valve Y2 is controlled to be connected, and the secondary rejection instruction is executed to ensure that the defective cigarette rods that have not been successfully rejected are rejected again and will not enter the next process.

[0093] The above-described embodiment of the present invention's loose-pack detection and rejection system for cigarette packaging machines automatically detects loose-packed cigarettes without manual intervention, thus improving the detection capabilities of existing equipment without increasing costs or impacting the original machine's functionality, thereby enhancing product quality. When the equipment produces loose-packed cigarettes with a loose-packed appearance, it automatically identifies and issues an alarm, then removes the defective product at the packaging machine's exit.

[0094] In addition, it should be pointed out that in the system and method of the present invention, it is obvious that each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present invention. Moreover, the steps of performing the above-mentioned series of processing can naturally be performed in chronological order according to the order of description, but they do not necessarily need to be performed in chronological order, and some steps can be performed in parallel or independently of each other. For those of ordinary skill in the art, it can be understood that all or any steps or components of the method and apparatus of the present invention can be implemented in hardware, firmware, software or a combination thereof in any computing device (including a processor, storage medium, etc.) or a network of computing devices. This can be achieved by those of ordinary skill in the art using their basic programming skills after reading the description of the present invention.

[0095] Therefore, the purpose of the present invention can also be achieved by running a program or a group of programs on any computing device. The computing device can be a well-known general-purpose device. Therefore, the purpose of the present invention can also be achieved simply by providing a program product containing program code that implements the method or device. That is to say, such a program product also constitutes the present invention, and the storage medium storing such a program product also constitutes the present invention. Obviously, the storage medium can be any well-known storage medium or any storage medium developed in the future. It should also be pointed out that in the device and method of the present invention, it is obvious that each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present invention. In addition, the steps of performing the above-mentioned series of processing can naturally be performed in chronological order according to the order of description, but do not necessarily need to be performed in chronological order. Certain steps can be performed in parallel or independently of each other.

[0096] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A cigarette packing machine loose pack detection and rejection system, characterized by: include: Conveying push head (1); A proximity switch (11) provided on one side of the conveying push head (1); A conveying station (2) fixedly connected to the conveying push head (1); A laser detector (21) disposed on one side of the conveying station (2); a first rejecting station (31) fixedly connected to the conveying station (2); a second reject station (32) fixedly connected to the first reject station; a collecting station disposed on one side of the first rejecting station and the second rejecting station (32); An optical fiber detector (4) provided on a collection station; a controller electrically connected to the proximity switch (11), the laser detector (21), the optical fiber detector (4), the first reject station (31), and the second reject station (32); After the conveying pusher (1) pushes the strip transparent bulk bag onto the conveying station (1), the controller obtains the defect recognition information of the laser detector (21); when the laser detector (21) recognizes the strip transparent bulk bag with defects, the controller detects that the conveying pusher (1) moves a preset number of times, and then controls the first rejection station (31) to start the rejection action; when the optical fiber detector (4) detects that the strip transparent bulk bag with defects is at the collection station, the rejection is terminated; When the optical fiber detector (4) detects that the loose strip package is not in the collection station, the second rejection station (32) is controlled to start the rejection action.

2. The cigarette packing machine loose pack detection and rejection system according to claim 1, characterized in that: The control circuit comprises: A first relay (K1), a second relay (K2), a third relay (K3), a first solenoid valve (Y1), a second solenoid valve (Y2), and an audible and visual alarm (H1) are connected in parallel.

3. The cigarette packing machine loose pack detection and rejection system according to claim 2, characterized in that: The first reject station (31) comprises: First reject cylinder; a reject flap fixedly connected to the first reject cylinder; The first reject cylinder is electrically connected to the first solenoid valve (Y1).

4. The cigarette packing machine loose pack detection and rejection system according to claim 2, characterized in that: The second reject station (32) comprises: Second rejection cylinder; The second reject cylinder is electrically connected to the second solenoid valve (Y2).

5. The cigarette packing machine loose pack detection and rejection system according to claim 2, characterized in that: The first solenoid valve (Y1) is electrically connected to the control circuit via a first coil (L1).

6. The cigarette packing machine loose pack detection and rejection system according to claim 2, characterized in that: The second solenoid valve (Y2) is electrically connected to the control circuit via a second coil (L2).

7. The cigarette packing machine loose pack detection and rejection system according to claim 2, characterized in that: The sound and light alarm (H1) is electrically connected to the control circuit via a third coil (L3).

8. The cigarette packing machine loose pack detection and rejection system according to claim 2, characterized in that: The controller includes: A first output interface (Q0), a second output interface (Q1), a third output interface (Q2), a first receiving interface (I1), a second receiving interface (I2), and a third receiving interface (I3); The first output interface (Q0) is electrically connected to the first relay (K1); The second output interface (Q1) is electrically connected to the second relay (K2); The third output interface (Q2) is electrically connected to the third relay (K3); The first receiving interface (I1) is electrically connected to the proximity switch (11); The second receiving interface (I2) is electrically connected to the laser detector (21); The third receiving interface (I3) is electrically connected to the optical fiber detector (4).

9. A method for detecting and rejecting loose packs in a cigarette packaging machine, characterized in that: The method for detecting and rejecting loose packs of a cigarette packaging machine according to any one of claims 1 to 8 comprises: After the conveying pusher pushes the strip transparent bulk package to the conveying station, the controller obtains the defect recognition information of the laser detector; When the laser detector identifies a defective loose bag, the controller detects that the conveying push head has moved a preset number of times, and then controls the first rejection station to start the rejection action; When the optical fiber detector detects that the defective strip package is in the collection station, it is removed; When the optical fiber detector detects that the loose package is not in the collecting station, the second rejecting station is controlled to start the rejecting action.

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