A web core tube plug connection detection apparatus and method

Abstract

A kind of paper roll core pipe plug head connection detection device, with packing machine, for detecting whether the plug head of paper roll core pipe two ends is installed, including frame and the packing station on the frame, the packing station is used to carry paper roll core pipe, the frame is equipped with in order with paper roll to position detection unit, plug head detection unit and driving device, the paper roll to position detection unit includes the first photoelectric sensor in the entrance of packing machine, for detecting whether paper roll core pipe enters packing station, and the activation of plug head detection unit is controlled, the plug head detection unit includes the second photoelectric sensor and the third photoelectric sensor in the center of paper roll core pipe two ends respectively, for detecting whether there is plug head in paper roll core pipe two ends, the plug head detection unit is connected with driving device by transmission device, still include execution prompt unit, the execution prompt unit is connected with plug head detection unit, for alarming when plug head detection unit does not detect plug head.

Description

Technical Field

[0001] This invention relates to the field of roll inspection equipment, and more particularly to a roll paper core tube plug connection detection device and method. Background Technology

[0002] As a commonly used paper product, the production process of roll paper typically includes processes such as raw paper slitting, winding, core tube assembly, and packaging. The core tube, as the supporting structure of the roll paper, requires plugs at both ends to prevent edge wear, provide moisture and dust protection, and ensure structural stability after packaging. In actual packaging, due to factors such as human error and mechanical malfunctions during plug assembly, problems such as missing plugs at one or both ends of the core tube, or improper plug installation (e.g., loosening or misalignment), can easily occur.

[0003] In existing technologies, the detection of plugs in paper roll packaging lines mostly relies on manual visual sampling. This method has obvious drawbacks: it is inefficient and unreliable, manual inspection is slow, and it is prone to missed inspections due to visual fatigue. It cannot achieve 100% inspection, and the entry of defective products into the market will affect product quality and brand reputation. Therefore, there is an urgent need for a core tube plug detection device that is highly automated, accurate, compatible with paper core tubes of different diameters and lengths, highly adaptable, and does not damage the product, in order to solve the defects of existing technologies. Summary of the Invention

[0004] In view of the above-mentioned shortcomings in the field of roll inspection equipment, the present invention provides a roll paper core tube plug connection detection device and method, which can realize the automated detection of core tube plugs during the roll paper packaging process, and solve the problems of low efficiency and high missed detection rate of manual inspection.

[0005] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0006] A roll paper core tube plug connection detection device, connected to a packaging machine, is used to detect whether plugs are installed at both ends of the roll paper core tube. It includes a frame and a packaging station located on the frame. The packaging station is used to support the roll paper core tube. The frame is equipped with a roll arrival detection unit, a plug detection unit, and a drive device connected in sequence. The roll arrival detection unit includes a first photoelectric sensor located at the packaging machine inlet, used to detect whether the roll paper core tube has entered the packaging station and control the activation of the plug detection unit. The plug detection unit includes a second photoelectric sensor and a third photoelectric sensor located at the center ends of the roll paper core tube, respectively, used to detect whether there are plugs at both ends of the roll paper core tube. The plug detection unit is connected to the drive device via a transmission device. It also includes an execution prompt unit connected to the plug detection unit, used to issue an alarm when the plug detection unit fails to detect a plug.

[0007] According to one aspect of the present invention, the driving device includes a synchronous rotating shaft and a motor connected thereto. The synchronous rotating shaft is connected to the lower end of the transmission device and drives the transmission device to run through the motor, thereby controlling the height of the second photoelectric sensor and the third photoelectric sensor.

[0008] According to one aspect of the present invention, the transmission device includes a first rotating lead screw and a second rotating lead screw, the first rotating lead screw and the second rotating lead screw being symmetrically connected to both ends of a synchronous rotating shaft.

[0009] According to one aspect of the present invention, the first rotating lead screw and the second rotating lead screw are provided with sliders, the first rotating lead screw is connected to the second photoelectric sensor through the slider, and the second rotating lead screw is connected to the third photoelectric sensor through the slider.

[0010] According to one aspect of the invention, it further includes a control unit, the control unit comprising a multi-channel safety relay module, the multi-channel safety relay module being connected to the paper roll arrival detection unit and the plug detection unit respectively, and receiving signals from the first photoelectric sensor, the second photoelectric sensor and the third photoelectric sensor respectively.

[0011] According to one aspect of the present invention, the control unit is connected to the execution prompting unit and is configured to turn on when valid signals from both the second photoelectric sensor and the third photoelectric sensor are received simultaneously, or to turn off when valid signals from both the second photoelectric sensor and the third photoelectric sensor are not received simultaneously.

[0012] According to one aspect of the present invention, the execution prompting unit includes a packing machine control cabinet and an audible and visual alarm connected thereto, the audible and visual alarm being configured to sound an alarm when the control unit is disconnected, or to remain silent when the control unit is turned on.

[0013] According to one aspect of the present invention, the packaging machine control cabinet is provided with a drive device control switch for controlling the drive device so that the second photoelectric sensor and the third photoelectric sensor are aligned with the center of the roll paper core tube.

[0014] According to one aspect of the present invention, the second photoelectric sensor and the third photoelectric sensor are configured as suppressed diffuse reflection photoelectric sensors for distinguishing the reflection differences between the surface of the plug and the inner wall of the roll paper core tube and the background.

[0015] A method for detecting the connection of plugs at both ends of a paper roll core tube, connected to a packaging machine, for detecting whether plugs are installed at both ends of the paper roll core tube, including a frame and a packaging station located on the frame, the packaging station being used to support the paper roll core tube, the frame being provided with a paper roll arrival detection unit, a plug detection unit, a drive device, and an execution prompt unit connected in sequence, and further including:

[0016] Push the roll paper core tube to the packaging station and insert the plugs at both ends;

[0017] Adjust the height of the plug detection unit so that it is aligned with the center of the roll paper core tube;

[0018] The paper roll arrival detection unit activates the plug detection unit after detecting that the paper roll core tube has entered the packaging station.

[0019] The plug detection unit begins to detect whether plugs are present at both ends of the roll paper core tube;

[0020] If the plug detection unit detects that the plug is present, the packaging machine start circuit is activated and packaging proceeds normally, while the prompting unit remains silent. If the plug detection unit detects that the plug is absent, the packaging machine start circuit is deactivated, and the prompting unit starts alarming.

[0021] The advantages of this invention are: it enables automated detection of core tube plugs during the packaging process of roll paper, solving the problems of low efficiency and high missed detection rate of manual detection, as well as the poor adaptability and easy damage to products caused by traditional mechanical detection. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a roll paper core tube plug connection detection device according to the present invention;

[0024] Figure 2 This is a schematic flowchart of a method for detecting the connection of the plug head of a roll paper core tube according to the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Paper core tube roll; 2. Left end cap; 3. Right end cap; 4. First photoelectric sensor; 5. Second photoelectric sensor; 6. Third photoelectric sensor; 7. First rotating lead screw; 8. Second rotating lead screw; 9. Synchronous rotating shaft; 10. Motor; 11. Multi-channel safety relay module; 12. Audible and visual alarm; 13. Drive device control switch; 14. Packaging machine control cabinet. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1

[0029] like Figure 1 As shown, a roll paper core tube plug connection detection device is connected to a packaging machine and is used to detect whether the left plug 2 and right plug 3 at both ends of the roll paper core tube 1 are correctly installed. It includes a frame and a packaging station located on the frame. The packaging station is used to support the roll paper core tube 1. The frame is also provided with a paper roll arrival detection unit, a plug detection unit, a drive device and an execution prompt unit connected in sequence.

[0030] The paper roll arrival detection unit includes a first photoelectric sensor 4 located at the entrance of the packaging machine. The first photoelectric sensor 4 is configured as an arrival photoelectric sensor to detect whether the paper roll core tube 1 has entered and correctly stopped at the packaging station, and at the same time controls the activation of the plug detection unit. The plug detection unit is activated only when the first photoelectric sensor 4 detects that the paper roll core tube 1 has entered the packaging station.

[0031] The plug detection unit includes a second photoelectric sensor 5 and a third photoelectric sensor 6 located at opposite ends of the center of the roll paper core tube 1, respectively, for detecting the presence of the right-side plug 3 and the left-side plug 2 at both ends of the roll paper core tube 1. The plug detection unit is connected to the drive device via a transmission device. The second photoelectric sensor 5 and the third photoelectric sensor 6 are configured as suppressed diffuse reflection photoelectric sensors, capable of distinguishing the differences in reflection between the surface of the left-side plug 2 and the right-side plug 3 and the inner wall of the roll paper core tube and the background.

[0032] The drive device includes a synchronous rotating shaft 9 and a motor 10 connected to it. The synchronous rotating shaft 9 is connected to the lower end of the transmission device and is driven by the motor 10 to operate the transmission device, thereby controlling the height of the second photoelectric sensor 5 and the third photoelectric sensor 6. The transmission device includes a first rotating lead screw 7 and a second rotating lead screw 8, which are symmetrically connected to the two ends of the synchronous rotating shaft 9. Slider blocks are provided on the first rotating lead screw 7 and the second rotating lead screw 8. The first rotating lead screw 7 is connected to the second photoelectric sensor 5 through the slider, and the second rotating lead screw 8 is connected to the third photoelectric sensor 6 through the slider. The synchronous rotating shaft 9, controlled by the motor 10, is connected to the first rotating lead screw 7 and the second rotating lead screw 8, so that the second photoelectric sensor 5 and the third photoelectric sensor 6 are at the same height. When the first rotating lead screw 7 and the second rotating lead screw 8 rotate, they drive the sliders and the second and third photoelectric sensors 5 and 6 to rise or fall precisely.

[0033] The execution prompting unit includes a baling machine control cabinet 14 and an audible and visual alarm 12 connected to it. The baling machine control cabinet 14 also has a control unit and a drive device control switch 13. The execution prompting unit is connected to the plug detection unit and is used to sound an alarm when the plug detection unit fails to detect a plug. The drive device control switch 13 is connected to a motor 10, which drives the transmission structure to align the second photoelectric sensor 5 and the third photoelectric sensor 6 with the center of the roll paper core tube 1. The control unit includes a multi-channel safety relay module 11, which is individually connected to the paper roll positioning detection unit and the plug detection unit, and receives signals from the first photoelectric sensor 4, the second photoelectric sensor 5, and the third photoelectric sensor 6, respectively. The control unit is configured to turn on when it simultaneously receives valid signals from the second photoelectric sensor 5 and the third photoelectric sensor 6, or turn off when it does not simultaneously receive valid signals from the second photoelectric sensor 5 and the third photoelectric sensor 6. The audible and visual alarm 12 is configured to sound an alarm and provide an audible and visual prompt when the control unit is off, or remain silent when the control unit is on. The main control circuit of the baler is connected in series with the output channel of the control unit. When the output channel of the control unit is disconnected, the start button of the baler becomes ineffective and the baling operation cannot be performed.

[0034] After the operator pushes the roll paper core tube to the packaging station and inserts the left stopper 2 and right stopper 3 respectively, they adjust the drive device control switch 13 to align the second photoelectric sensor 5 and the third photoelectric sensor 6 with the center of the roll paper core tube 1. When the first photoelectric sensor 4 detects that the roll paper core tube 1 has entered the packaging station, the second photoelectric sensor 5 and the third photoelectric sensor 6 begin to detect the presence of the left stopper 2 and the right stopper 3 and send signals to the control unit. When the control unit receives the signals from the second photoelectric sensor 5 and the third photoelectric sensor 6 simultaneously and determines that both signals are valid, it closes the output channel. At this time, the packaging machine start circuit is connected, allowing packaging, and the audible and visual alarm 12 is in a silent state. If at least one end of the left stopper 2 or the right stopper 3 is missing, the corresponding sensor will have no signal, the control unit output channel will be disconnected, the packaging machine will not start, and the audible and visual alarm 12 will sound an alarm, prompting the operator to reinstall the stopper.

[0035] Advantages of this invention: It includes a frame and a packaging station located on the frame. The packaging station is used to carry the roll paper core tube. The frame is equipped with a paper roll arrival detection unit, a plug detection unit, and a drive device connected in sequence. The paper roll arrival detection unit includes a first photoelectric sensor located at the entrance of the packaging machine, used to detect whether the roll paper core tube has entered the packaging station and to control the activation of the plug detection unit. The plug detection unit includes a second photoelectric sensor and a third photoelectric sensor located at the two ends of the center of the roll paper core tube, respectively, used to detect whether there are plugs at both ends of the roll paper core tube. The plug detection unit is connected to the drive device through a transmission device. It also includes an execution prompt unit connected to the plug detection unit, used to alarm when the plug detection unit fails to detect a plug. This invention can realize the automated detection of core tube plugs during the roll paper packaging process, solving the problems of low efficiency and high missed detection rate of manual detection, as well as the poor adaptability and easy damage to products caused by traditional mechanical detection.

[0036] Example 2

[0037] A method for detecting the connection of plugs at both ends of a roll paper core tube is provided, based on a roll paper core tube plug connection detection device described in Embodiment 1. The device is connected to a packaging machine and is used to detect whether plugs are installed at both ends of the roll paper core tube 1. The device includes a frame and a packaging station located on the frame. The packaging station is used to support the roll paper core tube 1. The frame is provided with a paper roll arrival detection unit, a plug detection unit, a drive device, and an execution prompt unit connected in sequence.

[0038] The paper roll arrival detection unit includes a first photoelectric sensor 4 located at the entrance of the packaging machine. The first photoelectric sensor 4 is configured as an arrival photoelectric sensor to detect whether the paper roll core tube 1 has entered and correctly stopped at the packaging station, and at the same time controls the activation of the plug detection unit. The plug detection unit is activated only when the first photoelectric sensor 4 detects that the paper roll core tube 1 has entered the packaging station.

[0039] The plug detection unit includes a second photoelectric sensor 5 and a third photoelectric sensor 6 located at opposite ends of the center of the roll paper core tube 1, respectively, for detecting the presence of the right-side plug 3 and the left-side plug 2 at both ends of the roll paper core tube 1. The plug detection unit is connected to the drive device via a transmission device. The second photoelectric sensor 5 and the third photoelectric sensor 6 are configured as suppressed diffuse reflection photoelectric sensors, capable of distinguishing the differences in reflection between the surface of the left-side plug 2 and the right-side plug 3 and the inner wall of the roll paper core tube and the background.

[0040] The drive device includes a synchronous rotating shaft 9 and a motor 10 connected to it. The synchronous rotating shaft 9 is connected to the lower end of the transmission device and is driven by the motor 10 to operate the transmission device, thereby controlling the height of the second photoelectric sensor 5 and the third photoelectric sensor 6. The transmission device includes a first rotating lead screw 7 and a second rotating lead screw 8, which are symmetrically connected to the two ends of the synchronous rotating shaft 9. Slider blocks are provided on the first rotating lead screw 7 and the second rotating lead screw 8. The first rotating lead screw 7 is connected to the second photoelectric sensor 5 through the slider, and the second rotating lead screw 8 is connected to the third photoelectric sensor 6 through the slider. The synchronous rotating shaft 9, controlled by the motor 10, is connected to the first rotating lead screw 7 and the second rotating lead screw 8, so that the second photoelectric sensor 5 and the third photoelectric sensor 6 are at the same height. When the first rotating lead screw 7 and the second rotating lead screw 8 rotate, they drive the sliders and the second and third photoelectric sensors 5 and 6 to rise or fall precisely.

[0041] The execution prompting unit includes a baling machine control cabinet 14 and an audible and visual alarm 12 connected to it. The baling machine control cabinet 14 also has a control unit and a drive device control switch 13. The execution prompting unit is connected to the plug detection unit and is used to sound an alarm when the plug detection unit fails to detect a plug. The drive device control switch 13 is connected to a motor 10, which drives the transmission structure to align the second photoelectric sensor 5 and the third photoelectric sensor 6 with the center of the roll paper core tube 1. The control unit includes a multi-channel safety relay module 11, which is individually connected to the paper roll positioning detection unit and the plug detection unit, and receives signals from the first photoelectric sensor 4, the second photoelectric sensor 5, and the third photoelectric sensor 6, respectively. The control unit is configured to turn on when it simultaneously receives valid signals from the second photoelectric sensor 5 and the third photoelectric sensor 6, or turn off when it does not simultaneously receive valid signals from the second photoelectric sensor 5 and the third photoelectric sensor 6. The audible and visual alarm 12 is configured to sound an alarm and provide an audible and visual prompt when the control unit is off, or remain silent when the control unit is on. The main control circuit of the baler is connected in series with the output channel of the control unit. When the output channel of the control unit is disconnected, the start button of the baler becomes ineffective and the baling operation cannot be performed.

[0042] The method for detecting the connection line of the roll paper core tube plug also includes the following steps:

[0043] S1: Push the roll paper core tube 1 to the packaging station and insert the plugs at both ends.

[0044] The operator pushes the roll paper core tube to the packaging station and inserts the left stopper 2 and the right stopper 3 respectively.

[0045] S2: Adjust the height of the plug detection unit so that it is aligned with the center of the roll paper core tube 1.

[0046] Adjust the drive device control switch 13 to make the second photoelectric sensor 5 and the third photoelectric sensor 6 aligned with the center position of the roll paper core tube 1.

[0047] S3: The paper roll arrival detection unit activates the plug detection unit after detecting that the paper roll core tube 1 has entered the packaging station.

[0048] S4: The plug detection unit starts detecting whether plugs exist at both ends of the roll paper core tube 1.

[0049] When the first photoelectric sensor 4 detects that the roll paper core tube 1 has entered the packaging station, the second photoelectric sensor 5 and the third photoelectric sensor 6 begin to detect the presence of the left stopper 2 and the right stopper 3, and send signals to the control unit.

[0050] S5: If the plug detection unit detects that the plug is present, the packaging machine start circuit is connected and packaging is performed normally, while the prompting unit remains silent; if the plug detection unit detects that the plug is not present, the packaging machine start circuit is disconnected, and the prompting unit starts alarming.

[0051] When the control unit simultaneously receives signals from both the second photoelectric sensor 5 and the third photoelectric sensor 6 and determines that both signals are valid, it closes the output channel. At this time, the baler's start-up circuit is activated, allowing baling, while the audible and visual alarm 12 remains silent. If at least one end of the left stopper 2 or the right stopper 3 is missing, the corresponding sensor will not send a signal, the control unit's output channel will be disconnected, the baler will not start, and the audible and visual alarm 12 will sound, prompting the operator to reinstall the stopper.

[0052] Advantages of this invention: It includes a frame and a packaging station located on the frame. The packaging station is used to carry the roll paper core tube. The frame is equipped with a paper roll arrival detection unit, a plug detection unit, and a drive device connected in sequence. The paper roll arrival detection unit includes a first photoelectric sensor located at the entrance of the packaging machine, used to detect whether the roll paper core tube has entered the packaging station and to control the activation of the plug detection unit. The plug detection unit includes a second photoelectric sensor and a third photoelectric sensor located at the two ends of the center of the roll paper core tube, respectively, used to detect whether there are plugs at both ends of the roll paper core tube. The plug detection unit is connected to the drive device through a transmission device. It also includes an execution prompt unit connected to the plug detection unit, used to alarm when the plug detection unit fails to detect a plug. This invention can realize the automated detection of core tube plugs during the roll paper packaging process, solving the problems of low efficiency and high missed detection rate of manual detection, as well as the poor adaptability and easy damage to products caused by traditional mechanical detection.

[0053] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A device for detecting the connection of plugs at both ends of a roll paper core tube, connected to a packaging machine, for detecting whether plugs are installed at both ends of the roll paper core tube (1), comprising a frame and a packaging station located on the frame, wherein the packaging station is used to support the roll paper core tube (1), characterized in that, The frame is provided with a paper roll arrival detection unit, a plug detection unit and a drive device connected in sequence. The paper roll arrival detection unit includes a first photoelectric sensor (4) located at the entrance of the packaging machine, which is used to detect whether the paper roll core tube (1) has entered the packaging station and to control the activation of the plug detection unit. The plug detection unit includes a second photoelectric sensor (5) and a third photoelectric sensor (6) located at the center ends of the paper roll core tube (1) respectively, which are used to detect whether there are plugs at both ends of the paper roll core tube (1). The plug detection unit is connected to the drive device through a transmission device and also includes an execution prompt unit. The execution prompt unit is connected to the plug detection unit and is used to alarm when the plug detection unit does not detect a plug.

2. The detection device for the connection line of the roll paper core tube plug according to claim 1, characterized in that, The drive device includes a synchronous rotating shaft (9) and a motor (10) connected thereto. The synchronous rotating shaft (9) is connected to the lower end of the transmission device and drives the transmission device to run through the motor (10), thereby controlling the height of the second photoelectric sensor (5) and the third photoelectric sensor (6).

3. The detection device for the connection line of the roll paper core tube plug according to claim 2, characterized in that, The transmission device includes a first rotating lead screw (7) and a second rotating lead screw (8), which are symmetrically connected to both ends of a synchronous rotating shaft (9).

4. The detection device for the connection line of the roll paper core tube plug according to claim 3, characterized in that, The first rotating lead screw (7) and the second rotating lead screw (8) are provided with sliders. The first rotating lead screw (7) is connected to the second photoelectric sensor (5) through the slider, and the second rotating lead screw (8) is connected to the third photoelectric sensor (6) through the slider.

5. The detection device for the connection line of the roll paper core tube plug according to claim 1, characterized in that, It also includes a control unit, which includes a multi-channel safety relay module (11), which is connected to the paper roll arrival detection unit and the plug detection unit respectively, and receives signals from the first photoelectric sensor (4), the second photoelectric sensor (5) and the third photoelectric sensor (6) respectively.

6. The detection device for the connection line of the roll paper core tube plug according to claim 5, characterized in that, The control unit is connected to the execution prompt unit and is configured to turn on when it receives valid signals from both the second photoelectric sensor (5) and the third photoelectric sensor (6) at the same time, or turn off when it does not receive valid signals from both the second photoelectric sensor (5) and the third photoelectric sensor (6) at the same time.

7. The roll paper core tube plug connection detection device according to claim 6, characterized in that, The execution prompt unit includes a packaging machine control cabinet (14) and an audible and visual alarm (12) connected thereto. The audible and visual alarm (12) is set to alarm when the control unit is disconnected, or to remain silent when the control unit is turned on.

8. The detection device for the connection line of the roll paper core tube plug according to claim 7, characterized in that, The packaging machine control cabinet is equipped with a drive device control switch (13) for controlling the drive device so that the second photoelectric sensor (5) and the third photoelectric sensor (6) are aligned with the center of the roll paper core tube (1).

9. The detection device for the connection line of the roll paper core tube plug according to any one of claims 1 to 8, characterized in that, The second photoelectric sensor (5) and the third photoelectric sensor (6) are configured as suppressed diffuse reflection photoelectric sensors to distinguish the reflection differences between the end cap surface and the inner wall of the roll paper core tube (1) and the background.

10. A method for detecting the connection of plugs at both ends of a roll paper core tube, implemented based on the roll paper core tube plug connection detection device according to claim 1, connected to a packaging machine, used to detect whether plugs are installed at both ends of the roll paper core tube (1), including a frame and a packaging station located on the frame, the packaging station being used to support the roll paper core tube (1), characterized in that, The frame is equipped with a paper roll arrival detection unit, a plug detection unit, a drive device, and an execution prompt unit connected in sequence, and also includes: Push the roll paper core tube (1) to the packaging station and insert the plugs at both ends; Adjust the height of the plug detection unit so that it is aligned with the center of the roll paper core tube (1); The paper roll arrival detection unit activates the plug detection unit after detecting that the paper roll core tube (1) has entered the packaging station; The plug detection unit begins to detect whether plugs exist at both ends of the roll paper core tube (1); If the plug detection unit detects that the plug is present, the packaging machine start circuit is activated and packaging proceeds normally, while the prompting unit remains silent. If the plug detection unit detects that the plug is absent, the packaging machine start circuit is deactivated, and the prompting unit starts alarming.

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