Bag detection device

Abstract

This invention relates to the field of material packaging, specifically to a bag-feeding detection device. At the moment the bag opening fails to open, the bag-feeding machine's grippers, due to their inertia, will continue to push the bag a short distance. At this time, lacking an effective physical stop mechanism, the closed bag opening will still violently compress against the discharge nozzle during its inertial stroke, directly causing the bag to break at the tip of the discharge nozzle. The bag-feeding detection device, when the bag opening is not open and is subjected to continuous compression, unfolds an arc-shaped detection arm along a conical guide surface, driving a limit buckle to approach the insertion shaft. Subsequently, the relative angular displacement of the lower deflection frame drives the insertion shaft to insert into the limit buckle, thereby locking the arc-shaped detection arm at the stop ring of the discharge nozzle. This effectively prevents the bag from continuing to move towards the discharge nozzle, avoiding hard contact or even breakage of the bag against the discharge nozzle due to continuous compression while the bag opening is closed, thus reducing packaging losses.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of material packaging, in particular to a bag detection device. BACKGROUND

[0002] In the automatic packaging production process of powder and granular materials (such as cement, chemical raw materials, food, etc.), an automatic bagging packaging machine is usually used to automatically set a packaging bag on the discharge nozzle of the packaging machine, and then fill the material into the bag through the discharge nozzle. The reliability of the bagging operation directly determines the packaging efficiency and the degree of material loss.

[0003] When the existing automatic bagging packaging machine performs bagging operation, the bagging machine clamping jaw usually clamps and pushes the packaging bag to the discharge nozzle of the packaging machine. However, in actual production, due to the softness of the packaging bag material, the bag opening sticking or not being able to be normally opened in the previous process due to static electricity or extrusion, etc., the bag opening often fails to open, i.e. the bag opening is still in a closed or semi-closed state. When the above situation occurs, the bagging machine clamping jaw will still forcibly push the packaging bag to the discharge nozzle according to the preset stroke. At this time, the closed bag opening cannot be smoothly set on the discharge nozzle, and if the packaging machine continues to supply material to the discharge nozzle, a large amount of material will leak from the gap between the bag opening and the discharge nozzle. This not only causes material waste, but also generates a large amount of dust in the production environment, and the closed bag opening is easily extruded with the discharge nozzle during continuous pushing, causing the packaging bag to be damaged, further increasing the packaging loss.

[0004] To solve the above problems, some existing technologies install a bag opening detection device on the packaging machine. Common detection methods include: Non-contact detection: such as photoelectric sensor or visual detection. However, in the powder material packaging site, there is often a high concentration of suspended dust. The detection window of the photoelectric sensor is easy to fail due to dust adhesion, and the visual detection is also easily disturbed by dust, causing the detection reliability to drop sharply and unable to work stably.

[0005] Mechanical touch detection: triggering a signal by mechanical contact between the detection arm and the bag opening. This type of solution can resist dust interference to some extent. However, the existing mechanical detection device generally has the following defects: Once the bag opening is detected to be abnormal, only an alarm signal or stop of subsequent filling can be output. However, at the moment when the bag opening fails to open, the bagging machine clamping jaw will continue to push the packaging bag for a certain distance due to its inertia. At this time, due to the lack of effective physical stop mechanism, the closed bag opening will still be extruded with the discharge nozzle in the inertial stroke, directly causing the packaging bag to be damaged at the tip of the discharge nozzle. SUMMARY

[0006] The purpose of this invention is to provide a bagging detection device to solve the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: a bagging detection device, including a packaging machine frame, a bag-pressing cylinder fixedly mounted on the packaging machine frame, a bearing bracket fixedly connected to the piston rod end of the bag-pressing cylinder, a packaging machine discharge nozzle disposed on the side wall of the packaging machine frame, a dust adsorption hood also installed on the side wall of the packaging machine frame, the dust adsorption hood surrounding the packaging machine discharge nozzle, a bearing rotating shaft fixedly mounted on the bearing bracket, an angular displacement deflection assembly rotatably connected to the bearing rotating shaft, a detection plate fixedly mounted on the outer wall of the angular displacement deflection assembly facing the bag-pressing cylinder, a proximity switch fixedly mounted on the bearing bracket, the detection end of the proximity switch facing the detection plate and set to a normally lit state, and two semi-circular detection components symmetrically arranged on the angular displacement deflection assembly with the bearing bracket as the center.

[0007] Preferably, the outer wall of the end of the packaging machine's discharge nozzle is machined into a tapered guide surface, and a stop ring is fixedly provided at the root of the tapered guide surface.

[0008] Preferably, each of the semi-circular detection components includes a fixed side plate fixedly connected to the angular displacement deflection component. An arc-shaped detection arm is hinged to the fixed side plate. A limiting guide groove is formed on the fixed side plate. A limiting rod is slidably fitted in the limiting guide groove. A compression spring is provided between the limiting rod and the fixed side plate. A moving guide groove is formed along the arc direction of the arc-shaped detection arm. A guide slide is slidably installed in the moving guide groove. A guide shaft is fixedly connected to the guide slide. A guide roller is provided on the guide shaft. The guide roller is simultaneously embedded in the moving guide groove and the limiting guide groove and can roll along both. The bottom end of the limiting rod is connected to the guide shaft.

[0009] Preferably, the angular displacement deflection assembly includes an upper deflection frame and a lower deflection frame. The upper deflection frame is rotatably connected to the bearing shaft. The detection plate is fixedly mounted on the side wall of the upper deflection frame. The lower deflection frame is hinged to the upper deflection frame via a connecting shaft, and a torsion spring is sleeved on the connecting shaft. The fixed side plates of the two semi-annular detection assemblies are respectively fixed to the two side walls of the lower deflection frame. A limit stop is also fixedly mounted on the bearing bracket, and the limit stop is located on the deflection path of the upper deflection frame.

[0010] Preferably, the lower deflection frame is provided with an adjustment groove, and an adjustment slider is slidably connected in the adjustment groove via a sliding roller. An extension support plate is fixedly connected to the outer wall of the upper deflection frame. The extension support plate and the adjustment slider are connected by a hinged connecting rod. A plug-in shaft is also fixedly connected to the outer wall of the adjustment slider. A limit buckle is fixedly provided on the limiting rod, and the limit buckle and the plug-in shaft form a plug-in engagement.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: In this invention, the touch-type detection structure composed of two semi-circular detection components can accurately detect the opening state of the bag opening before the packaging bag is placed on the discharge nozzle. When the bag opening is not open or not fully open, the closed bag opening will directly impact the arc-shaped detection arm, causing the angular displacement deflection component to tilt and drive the detection plate away from the proximity switch, thereby quickly losing the detection signal. The control system then immediately prohibits the discharge nozzle from discharging material. The detection method is direct and reliable, avoiding the material leakage and environmental pollution problems caused by forced filling due to the bag opening not being open.

[0012] In this invention, when the bag opening is closed and subjected to continuous pressure, the arc-shaped detection arm unfolds along the conical guide surface and drives the limiting buckle to approach the insertion shaft. Subsequently, the relative angular displacement of the lower deflection frame drives the insertion shaft to insert into the limiting buckle, thereby locking the arc-shaped detection arm at the stop ring of the discharge nozzle. This effectively prevents the packaging bag from continuing to move towards the discharge nozzle, avoiding hard contact or even damage between the packaging bag and the discharge nozzle due to continuous pressure when the bag opening is closed, thus reducing packaging losses.

[0013] In this invention, the two arc-shaped detection arms are smoothly incorporated into the open bag opening during normal bagging, without being squeezed or deflected. The proximity switch remains constantly lit, and the discharge nozzle discharges material normally. When the bag-pressing cylinder drives the detection component to retreat, the arc-shaped detection arms smoothly open along the conical guide surface of the discharge nozzle and smoothly bypass the stop ring under the guidance of the moving guide groove and the limiting guide groove, so that the packaging bag can be completely inserted into the depth of the discharge nozzle. The packaging process is smooth and without interference, which not only ensures the realization of the detection function, but also does not affect the efficiency of normal bagging operation at all. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the bagging detection device of the present invention; Figure 2 This is a schematic diagram of the initial detection position of the bagging detection device of the present invention; Figure 3 This is a schematic diagram of the bagging detection device returning to its original position after bagging in this invention; Figure 4 This is a schematic diagram of the packaging machine's discharge nozzle and dust adsorption hood in this invention; Figure 5This is a three-dimensional structural diagram of the semi-circular detection component and the angular displacement deflection component in this invention; Figure 6 This is a schematic diagram of the detection board and proximity switch in this invention; Figure 7 This is a three-dimensional structural diagram of the semi-circular detection component in this invention; Figure 8 This is a rear view of the semi-circular detection component in this invention; Figure 9 This is a schematic diagram of the insertion shaft and the limiting buckle in this invention; Figure 10 This is a side view of the semi-circular detection component and the angular displacement deflection component in this invention; Figure 11 This is a partial three-dimensional structural diagram of the semi-circular detection component and the angular displacement deflection component in this invention; Figure 12 This is a three-dimensional structural diagram of the angular displacement deflection component in this invention; Figure 13 This is a diagram showing the angular displacement deflection state of the upper deflection frame in the angular displacement deflection assembly of the present invention. Figure 14 This is a diagram showing the angular displacement deflection states of the upper and lower deflection frames in the angular displacement deflection assembly of the present invention.

[0015] In the diagram: 1. Packaging machine frame; 11. Bag pressing cylinder; 12. Bearing bracket; 13. Packaging machine discharge nozzle; 131. Conical guide surface; 132. Stop ring; 14. Dust adsorption hood; 15. Bearing rotating shaft; 16. Detection plate; 17. Proximity switch; 2. Semi-circular detection assembly; 21. Fixed side plate; 22. Limiting guide groove; 23. Arc-shaped detection arm; 24. Moving guide groove; 25. Guide slide; 26. Guide shaft; 27. Limiting rod; 28. Compression spring; 3. Angular displacement deflection assembly; 31. Upper deflection frame; 32. Lower deflection frame; 33. Connecting shaft; 34. Torsion spring; 35. Limiting stop bar; 36. Adjusting slide groove; 37. Sliding roller; 38. Adjusting slider; 39. Insertion shaft; 310. Extension support plate; 311. Hinge connecting rod; 312. Limiting buckle. Detailed Implementation

[0016] 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.

[0017] Example Please see Figures 1 to 14The present invention provides a technical solution: a bag detection device to solve the problem of material leakage and packaging bag damage caused by the bag opening not being opened; The bagging detection device includes a packaging machine frame 1 installed on an automatic bagging packaging machine. A bag-pressing cylinder 11 is fixedly installed on the packaging machine frame 1. A bearing bracket 12 is fixedly connected to the piston rod end of the bag-pressing cylinder 11. A packaging machine discharge nozzle 13 is configured on the side wall of the packaging machine frame 1 for spraying the material to be filled into the packaging bag. A dust adsorption hood 14 is also installed on the side wall of the packaging machine frame 1. The dust adsorption hood 14 is wrapped around the outer periphery of the packaging machine discharge nozzle 13 to absorb the dust generated when the packaging bag is placed on the discharge nozzle for filling operation. A bearing bracket 12 is fixedly mounted with a bearing shaft 15. An angular displacement deflection assembly 3 is rotatably connected to the bearing shaft 15. A detection plate 16 is fixedly mounted on the outer wall of the angular displacement deflection assembly 3 facing the bag pressing cylinder 11. A proximity switch 17 is fixedly mounted on the bearing bracket 12. The detection end of the proximity switch 17 faces the detection plate 16 and is set to a normally lit state. Two semi-circular detection components 2 are symmetrically arranged on the angular displacement deflection assembly 3 with the bearing bracket 12 as the center. These components are used to detect the opening state of the bag opening by mechanical contact during the bagging process.

[0018] Specifically, the outer wall of the end of the packaging machine's discharge nozzle 13 is processed into a tapered guide surface 131, and a stop ring 132 is fixedly provided at the root of the tapered guide surface 131. When the two semi-circular detection components 2 move away from the packaging machine's outlet 13, the inner wall of the semi-circular detection component 2 contacts the conical guide surface 131 and expands radially along the conical surface, thus facilitating the smooth disengagement of the semi-circular detection component 2 from the outlet when the packaging bag is subsequently put on.

[0019] Furthermore, the two semi-circular detection components 2 have the same structure. Taking one of them as an example, each semi-circular detection component 2 includes a fixed side plate 21 fixedly connected to the angular displacement deflection component 3. An arc-shaped detection arm 23 is hinged on the fixed side plate 21. The arc-shaped detection arms 23 on the two semi-circular detection components 2 together constitute the detection of the state of the packaging bag opening. A limiting guide groove 22 is opened on the fixed side plate 21. A limiting rod 27 is slidably fitted in the limiting guide groove 22. A compression spring 28 is provided between the limiting rod 27 and the fixed side plate 21. A moving guide groove 24 is opened along the arc direction of the arc-shaped detection arm 23. A guide slide 25 is slidably installed in the moving guide groove 24. A guide shaft 26 is fixedly connected to the guide slide 25. A guide roller is provided on the guide shaft 26. The guide roller is embedded in both the moving guide groove 24 and the limiting guide groove 22 and can roll along both. The bottom end of the limiting rod 27 is connected to the guide shaft 26, thereby providing a preload to the guide slide 25. Under normal initial conditions, the two arc-shaped detection arms 23 are located at the front end of the packaging machine's discharge nozzle 13. The compression spring 28 applies a pre-tightening force to the arc-shaped detection arms 23 through the guide slide 25, keeping them closed and blocking the front of the packaging machine's discharge nozzle 13, thereby performing a pre-detection of whether the packaging bag has been successfully placed on the discharge nozzle. At this time, the detection plate 16 and the proximity switch 17 are in alignment, and the proximity switch 17 remains constantly lit. When the bag opening is in a normally open state, as the bagging machine's grippers push the bag towards the packaging machine's discharge nozzle 13, the open bag opening will smoothly bypass the two arc-shaped detection arms 23 and incorporate the two arc-shaped detection arms 23 into the bag opening until the end face of the bag opening abuts against the fixed side plate 21. During this process, the arc-shaped detection arms 23 are not deflected by the bag opening, the detection plate 16 and the proximity switch 17 remain aligned, and the proximity switch 17 continuously outputs a detection signal. At this time, the packaging machine's discharge nozzle 13 is allowed to discharge material outwards, and the material smoothly enters the packaging bag without any risk of leakage. Subsequently, the bag-pressing cylinder 11 is activated, driving the bearing bracket 12 to simultaneously retract the angular displacement deflection component 3 and the two semi-circular detection components 2 away from the packaging machine's outlet 13. During this retraction process, the two arc-shaped detection arms 23 move along the conical guide surface 131 of the packaging machine's outlet 13. The arc-shaped detection arms 23 deflect and open with their hinge point with the fixed side plate 21 as the axis. The moving guide groove 24 and the limiting guide groove 22 limit the guide roller, guiding the guide slide 25 to move smoothly, ensuring that the two arc-shaped detection arms 23 smoothly disengage from the packaging machine's outlet 13, allowing the packaging bag to be inserted into a deeper position of the outlet. When the bag opening is not open or not fully open, during the process of the bagging machine's grippers pushing the bag, the closed bag opening will directly collide with the two closed arc-shaped detection arms 23. Under the continuous pushing force of the grippers, the bag opening squeezes the two arc-shaped detection arms 23, causing the angular displacement deflection component 3 to tilt. This, in turn, causes the detection plate 16 to deviate from its alignment position with the proximity switch 17. The proximity switch 17 cannot detect the detection plate 16, and the output signal is lost. The control system then issues an alarm command to prevent the packaging machine's discharge nozzle 13 from discharging material outward, thereby preventing material leakage.

[0020] In this embodiment, during the above detection process, the angular displacement deflection assembly 3 includes an upper deflection frame 31 and a lower deflection frame 32. The upper deflection frame 31 is rotatably connected to the bearing shaft 15. The detection plate 16 is fixedly installed on the side wall of the upper deflection frame 31. The lower deflection frame 32 is hinged to the upper deflection frame 31 through a connecting shaft 33. A torsion spring 34 is sleeved on the connecting shaft 33. Under normal conditions, the torsion spring 34 drives the upper deflection frame 31 and the lower deflection frame 32 to maintain a vertical collinear state. The fixed side plates 21 of the two semi-annular detection assemblies 2 are respectively fixed to the two side walls of the lower deflection frame 32. A limit stop bar 35 is also fixedly installed on the bearing bracket 12. The limit stop bar 35 is located on the deflection path of the upper deflection frame 31. When the bag opening is not open and the two semi-circular detection components 2 are squeezed, the two fixed side plates 21 drive the lower deflection frame 32 to deflect. Due to the initial rigidity of the torsion spring 34, the lower deflection frame 32 first drives the upper deflection frame 31 to deflect synchronously. At this time, the two still maintain a vertical collinear relationship. The deflection of the upper deflection frame 31 causes the detection plate 16 to deviate from the proximity switch 17, thereby realizing the loss of detection signal. When the squeezing pressure continues to increase, the lower deflection frame 32 overcomes the elastic force of the torsion spring 34 and generates an angular displacement relative to the upper deflection frame 31 around the connecting shaft 33.

[0021] In this embodiment, to provide further physical protection for the unopened bag opening and prevent the packaging bag from being damaged due to excessive compression, an adjustment groove 36 is provided on the lower deflection frame 32. An adjustment slider 38 is slidably connected in the adjustment groove 36 through a sliding roller 37. An extension support plate 310 is fixedly connected to the outer wall of the upper deflection frame 31. The extension support plate 310 and the adjustment slider 38 are connected through a hinged connecting rod 311. An insertion shaft 39 is also fixedly connected to the outer wall of the adjustment slider 38. Correspondingly, a limit buckle 312 is fixedly provided on the limit rod 27. The limit buckle 312 and the insertion shaft 39 form an insertion fit. When the bag opening is not open, the packaging bag squeezes the two arc-shaped detection arms 23, first driving the arc-shaped detection arms 23 to deflect toward the conical guide surface 131 of the packaging machine's discharge nozzle 13. Under the guidance of the inclined surface of the conical guide surface 131, the arc-shaped detection arms 23 further unfold relative to the fixed side plate 21. During the unfolding process, the guide slide 25 in the moving guide groove 24 and the limiting guide groove 22 drives the limiting rod 27 to move upward against the elastic force of the compression spring 28, thereby causing the limiting buckle 312 to move closer toward the insertion shaft 39. If the squeezing pressure continues to increase at this time, the upper deflection frame 31 deflects until its outer wall abuts against the limiting stop rod 35. Then, the lower deflection frame 32 generates an angular displacement relative to the upper deflection frame 31. During the angular displacement process... The hinged connecting rod 311 uses the connection point with the upper deflection frame 31 as the fulcrum to push the adjusting slider 38 to slide downward in the adjusting groove 36 through the sliding roller 37, that is, to move towards the limiting buckle 312. Since the limiting buckle 312 has approached the insertion shaft 39 at this time, the insertion shaft 39 is inserted into the limiting buckle 312 under the drive of the adjusting slider 38, thereby realizing the locking and limiting of the arc-shaped detection arm 23. After being locked, the two arc-shaped detection arms 23 are restricted at the stop ring 132 of the packaging machine outlet 13 and cannot continue to deflect or move, thereby preventing the packaging bag from continuing to move towards the outlet, avoiding the damage caused by the packaging bag being subjected to continuous compression and hard contact with the packaging machine outlet 13. When the bag opening is in a normally open state, although the two arc-shaped detection arms 23 will also unfold along the conical guide surface 131 during the retraction of the bearing bracket 12, and drive the limiting rod 27 to make the limiting buckle 312 approach the insertion shaft 39, since the upper deflection frame 31 and the lower deflection frame 32 always maintain a vertical collinear state and no relative angular displacement occurs, the adjusting slider 38 will not slide down, the insertion shaft 39 cannot be inserted into the limiting buckle 312, and the two arc-shaped detection arms 23 are in a free state. When the two arc-shaped detection arms 23 move away from the packaging machine outlet 13 under the drive of the bag pressing cylinder 11, they can smoothly bypass the stop ring 132 without interference, so that the subsequent packaging bags can be completely inserted into the packaging machine outlet 13 for normal packaging operations. When the pressure is released, the torsion spring 34 drives the lower deflection frame 32 to reset, the adjusting slider 38 slides upward to disengage the plug shaft 39 from the limit buckle 312, and at the same time the compression spring 28 pushes the limit rod 27 downward to reset, and the arc-shaped detection arm 23 returns to the closed state under the drive of the guide slide 25.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bagging detection device, characterized in that, Packaging machine frame (1) is installed on automatic bagging packaging machine; A bag-pressing cylinder (11) is fixedly mounted on the frame (1) of the packaging machine; The support bracket (12) is fixedly connected to the end of the piston rod of the bag-pressing cylinder (11); The packaging machine discharge nozzle (13) is disposed on the side wall of the packaging machine frame (1) and is used to spray the material to be filled into the packaging bag; A dust adsorption hood (14) is installed on the side wall of the packaging machine frame (1) and wrapped around the outer periphery of the packaging machine outlet (13) to absorb the dust generated when the packaging bag is placed on the outlet for filling operations. The bearing shaft (15) is fixedly mounted on the bearing bracket (12); An angular displacement deflection assembly (3) is rotatably connected to the bearing shaft (15); The detection plate (16) is fixedly installed on the outer wall of the angular displacement deflection assembly (3) facing the bag pressing cylinder (11); The proximity switch (17) is fixedly installed on the support bracket (12), with its detection end facing the detection plate (16), and is set to be normally lit. Two semi-circular detection components (2) are symmetrically arranged on the angular displacement deflection component (3) with the bearing bracket (12) as the center, and are used to detect the opening state of the bag opening by mechanical contact during the bagging process.

2. The bagging detection device according to claim 1, characterized in that: The outer wall of the end of the packaging machine nozzle (13) is processed into a tapered guide surface (131), and a stop ring (132) is fixedly provided at the root of the tapered guide surface (131).

3. The bagging detection device according to claim 2, characterized in that: Each of the semi-circular detection components (2) includes: The fixed side plate (21) is fixedly connected to the angular displacement deflection assembly (3); The arc-shaped detection arm (23) is hinged to the fixed side plate (21); The arc-shaped detection arms (23) on the two semi-circular detection components (2) together constitute the detection of the state of the packaging bag opening; A limiting guide groove (22) is provided on the fixed side plate (21); The limiting rod (27) is slidably fitted within the limiting guide groove (22); A compression spring (28) is disposed between the limiting rod (27) and the fixed side plate (21); The movable guide groove (24) is opened along the arc direction of the arc-shaped detection arm (23); The guide carriage (25) is slidably installed in the movable guide groove (24); The guide shaft (26) is fixedly connected to the guide slide (25). The guide shaft (26) is provided with a guide roller. The guide roller is simultaneously embedded in the moving guide groove (24) and the limiting guide groove (22) and can roll along both. The bottom end of the limiting rod (27) is connected to the guide shaft (26), thereby providing a preload to the guide carriage (25).

4. The bagging detection device according to claim 3, characterized in that: The arc-shaped detection arm (23) is configured to remain closed in the initial normal state and block the front of the packaging machine outlet (13), the detection plate (16) is aligned with the proximity switch (17), and the proximity switch (17) continuously outputs a detection signal.

5. The bagging detection device according to claim 3, characterized in that: The angular displacement deflection component (3) includes: The upper deflection frame (31) is rotatably connected to the bearing shaft (15), and the detection plate (16) is fixedly installed on the side wall of the upper deflection frame (31); The lower deflection frame (32) is hinged to the upper deflection frame (31) via a connecting shaft (33); A torsion spring (34) is sleeved on the connecting shaft (33) and drives the upper deflection frame (31) and the lower deflection frame (32) to remain vertically collinear under normal conditions. The fixed side plates (21) of the two semi-circular detection components (2) are respectively fixed to the two side walls of the lower deflection frame (32); The limiting stop bar (35) is fixedly installed on the bearing bracket (12) and located on the deflection path of the upper deflection frame (31).

6. The bagging detection device according to claim 5, characterized in that: The angular displacement deflection component (3) also includes: An adjusting slide (36) is provided on the lower deflection frame (32); A sliding roller (37) is disposed within the adjusting groove (36); The adjusting slider (38) is slidably connected to the adjusting groove (36) via the sliding roller (37); An extension support plate (310) is fixedly connected to the outer side wall of the upper deflection frame (31); A hinged connecting rod (311) is connected between the extension support plate (310) and the adjusting slider (38); The insertion shaft (39) is fixedly connected to the outer wall of the adjusting slider (38); The limiting buckle (312) is fixedly installed on the limiting rod (27) and forms a plug-in fit with the plug shaft (39).

7. The bagging detection device according to claim 6, characterized in that: The limiting rod (27) is configured such that when the arc-shaped detection arm (23) deflects and unfolds toward the tapered guide surface (131), the guide slide (25) drives the limiting rod (27) to move upward against the elastic force of the compression spring (28), so that the limiting buckle (312) moves toward the plug shaft (39).

8. The bagging detection device according to claim 7, characterized in that: The plug shaft (39) and the limiting buckle (312) are configured such that when the upper deflection frame (31) abuts against the limiting stop bar (35) and the lower deflection frame (32) continues to deflect, the two arc-shaped detection arms (23) are restricted at the stop ring (132).

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