A material feeding detection mechanism for packaging machinery

Abstract

The present invention relates to the technical field of material detection, and discloses a material feeding detection mechanism for a packaging machine, which includes a bracket, a conveyor belt installed on the bracket, two open-ended sleeves installed on the bracket, a rotating shaft is arranged in each open-ended sleeve, a motor is fixedly installed on the bracket, a plurality of fixing members are fixedly installed on each rotating shaft, a plurality of compression plates are arranged on each fixing member, each spring I is in a compressed state in the open-ended sleeve, the compression plates in the two open-ended sleeves are arranged staggeredly, a plurality of pigment bags are installed at the lower end of the opening of each open-ended sleeve. For this material feeding detection mechanism, the elastic force of spring I is used to push the compression plate to compress the air cushion. If the air cushion leaks, the downward pressure amplitude of the compression plate becomes larger, and the coloring strip in the pigment bag is pushed out to mark the leaking air cushion. The pigment in the area is detected by a pigment detection device, which improves the detection quality and reduces the situation of using unqualified air cushion films for packaging.

Description

Technical Field

[0001] The present invention relates to the technical field of material detection, and specifically provides a material feeding detection mechanism for packaging machinery. Background Technique

[0002] Packaging machinery refers to machinery that can complete all or part of the product and commodity packaging process. The packaging process includes main processes such as filling, wrapping, and sealing, as well as related front and back processes. When packaging fragile items, the material used for packaging is usually air cushion film. Since the middle layer of the air cushion film is filled with air, it is light in weight, transparent, and elastic, and has the properties of sound insulation, shock absorption, and anti-wear. It is widely used in the packaging of various fragile items. When the wrapped item is bumped, multiple air cushions on the air cushion film buffer the impact force it receives, thereby protecting the item.

[0003] The protection effect of the air cushion film is affected by the integrity of its air cushions. When one or a few air cushions leak, the overall protection effect of the air cushion film is not greatly affected. When the number of leaking air cushions increases, the protection effect of the air cushion film also decreases. The air cushions are usually cylindrical or bubble-shaped and are numerous, so manual detection is rather cumbersome. If a machine is used for detection, when the shape or arrangement gap of the air cushions changes due to the replacement of the air cushion film batch, it is difficult to accurately detect it, and it may use unqualified air cushion film to package items, resulting in easy damage to the items when they are bumped, causing certain losses. For this reason, we propose a material feeding detection mechanism for packaging machinery. Summary of the Invention

[0004] The purpose of the present invention is to provide a material feeding detection mechanism for packaging machinery to solve the problems raised in the above background technique.

[0005] To achieve the above object, the present invention provides the following technical solution: A material feeding detection mechanism for a packaging machine, including a bracket, a conveyor belt fixedly installed on the bracket, two open-ended sleeves fixedly installed on the bracket, with their open ends facing downward. A rotating shaft is arranged in each open-ended sleeve, and each rotating shaft is rotatably installed on the bracket. A second gear is fixedly installed at one end of each rotating shaft. A motor is fixedly installed on the bracket, and a first gear is fixedly installed at the output end of the motor. The first gear meshes synchronously with the second gears on the two rotating shafts. A number of fixing members are fixedly installed on each rotating shaft, and a number of compression plates are arranged on each fixing member. A number of spring ones and a number of telescopic columns are fixedly connected between each compression plate and the fixing member, and each spring one is in a compressed state within the open-ended sleeve. The compression plates in the two open-ended sleeves are arranged staggeredly. A number of pigment bags are fixedly installed at the lower end of the opening of each open-ended sleeve. The pigment bags correspond to the fixing members one by one and are made of elastic material. A wedge-shaped groove is arranged at the lower end of each pigment bag, and a coloring strip is fixedly installed on the inner wall of the top of each wedge-shaped groove. A pigment detection device for detecting the amount of pigment on the air cushion film is fixedly installed on the bracket.

[0006] Preferably, each open-ended sleeve is provided with a sliding groove and a limiting groove, which are respectively located on both sides of its opening and communicate with the opening. A number of sliding plates are arranged in each sliding groove, and a fixing block is fixedly installed on each sliding plate. A blocking rod is slidably installed in each sliding groove, and each blocking rod is fixedly connected to the fixing blocks on some of the sliding plates.

[0007] Preferably, connecting rods are fixedly installed at both ends of each blocking rod, and an electromagnetic block is fixedly installed at one end of each connecting rod. Electromagnetic plates are arranged on both sides of each connecting rod, and each electromagnetic plate is fixedly installed on the inner wall of the open-ended sleeve. An electromagnetic groove is arranged on one side of each electromagnetic plate, and each electromagnetic block is slidably installed in the electromagnetic grooves of the electromagnetic plates on both sides.

[0008] Preferably, a limiting rod is slidably installed in each blocking rod, a spring two is fixedly connected between one end of each limiting rod and the inner wall of the blocking rod, a number of clamping members cooperating with the fixing blocks are fixedly installed on each limiting rod, the clamping members correspond to the fixing blocks not fixedly connected to the blocking rod one by one, a number of clamping grooves for limiting the clamping members are arranged on each blocking rod, the clamping grooves correspond to the clamping members one by one, and the clamping members are slidably installed in the clamping grooves. A slide rail is arranged in each sliding groove, and one end of each limiting rod is slidably installed in the slide rail.

[0009] Preferably, a rectangular groove is provided inside the bracket. A push rod is slidably installed in the rectangular groove. Both ends of the push rod are fixedly connected to the slide rails inside the two open sleeves respectively. A threaded rod is rotatably installed on the push rod. The threaded rod is threadedly connected to the bracket, and a knob is fixedly installed at one end thereof.

[0010] Preferably, a plurality of elastic strips for assisting the compression spring I are fixedly installed at the opening of each open sleeve, and each compression plate is arranged in an arc shape to reduce the friction between it and the inner wall of the open sleeve.

[0011] Preferably, each limiting groove is located on the movement track of the corresponding slide plate, and a magnetic attraction strip is fixedly installed on the inner wall of its end. A magnetic attraction strip is also fixedly installed at the lower end of each slide plate.

[0012] Preferably, a limiting plate for limiting the air cushion film is fixedly installed on the bracket. The limiting plate is located above the conveyor belt, and one end of it is arranged in an arc shape for facilitating the placement of the air cushion film.

[0013] Preferably, an observation port is provided on the limiting plate. The observation port is located below the pigment detection device to delimit the detection range.

[0014] Preferably, each slide plate is made of a rigid material, and its movement track at the opening of the open sleeve is located between the pigment bag and the elastic strip.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] The present invention uses the elastic force of the spring I to push the compression plate to compress the air cushion. When the air cushion leaks, the downward pressure amplitude of the compression plate becomes larger, and the coloring strip in the pigment bag is pushed out to mark the leaking air cushion. Then, the subsequent pigment detection device detects the amount of pigment in the area. When the detected amount of pigment exceeds the predetermined amount, it means that the air cushion film in this area is unqualified, and an alarm will be given to remind the worker. There is no need for manual inspection of the packaged materials, and the inspection quality is improved, and the situation of using unqualified air cushion films for packaging is reduced.

[0017] The present invention uses two rows of detection devices to detect the air cushion film, and the compression plates of the two rows are arranged staggeredly to prevent missed detection of air cushions. By adjusting the gear through the knob, when in different gears, the electromagnetic drive lever drives the baffles in different areas to rise. When detecting the columnar air cushion, it can be detected in different areas, and it is not easy to cause the air cushion to burst due to too large a compression area. When detecting the bubble-shaped air cushion, the whole area is detected, improving the inspection quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 Schematic diagram of the structure of the present invention;

[0020] Figure 3 Schematic diagram of the motor drive structure of the present invention;

[0021] Figure 4 Schematic diagram of the compression plate and the rotating shaft structure of the present invention;

[0022] Figure 5 Schematic diagram of the first spring and the telescopic column structure of the present invention;

[0023] Figure 6 Schematic diagram of the elastic strip structure of the present invention;

[0024] Figure 7 Schematic diagram of the internal structure of the pigment tape of the present invention;

[0025] Figure 8 Schematic diagram of the internal structure of the chute of the present invention;

[0026] Figure 9 Schematic diagram of the electromagnetic plate and the stop bar structure of the present invention;

[0027] Figure 10 Schematic diagram of the internal structure of the stop bar of the present invention;

[0028] Figure 11 Schematic diagram of the push rod and the knob structure of the present invention;

[0029] Figure 12 Schematic diagram of the pigment detection structure of the present invention.

[0030] In the figure: 1, bracket; 2, conveyor belt; 3, pigment detection device; 4, motor; 5, open sleeve; 6, limit plate; 7, knob; 8, first gear; 9, second gear; 10, rotating shaft; 11, fixing member; 12, compression plate; 13, first spring; 14, telescopic column; 15, elastic strip; 16, pigment bag; 17, wedge-shaped groove; 18, coloring strip; 19, chute; 20, limit groove; 21, sliding plate; 22, stop bar; 23, fixing block; 24, magnetic attraction strip; 25, slide rail; 26, connecting rod; 27, electromagnetic block; 28, electromagnetic plate; 29, electromagnetic groove; 30, limit rod; 31, second spring; 32, clamping member; 33, clamping groove; 34, push rod; 35, rectangular groove; 36, threaded rod; 37, observation port. Detailed implementation method

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figures 1-12 , the present invention provides a technical solution: a material feeding detection mechanism for a packaging machine, including a bracket 1, a conveyor belt 2 fixedly installed on the bracket 1, two open-ended sleeves 5 fixedly installed on the bracket 1, the open ends of which are both facing downward, a rotating shaft 10 is arranged in each open-ended sleeve 5, each rotating shaft 10 is rotatably installed on the bracket 1, a second gear 9 is fixedly installed at one end of each rotating shaft 10, a motor 4 is fixedly installed on the bracket 1, a first gear 8 is fixedly installed at the output end of the motor 4, the first gear 8 is synchronously engaged with the second gears 9 on the two rotating shafts 10. When the motor 4 works, it will drive the two rotating shafts 10 to rotate synchronously. A plurality of fixing members 11 are fixedly installed on each rotating shaft 10, a plurality of compression plates 12 are arranged on each fixing member 11, a plurality of first springs 13 and a plurality of telescopic columns 14 are fixedly connected between each compression plate 12 and the fixing member 11, and each first spring 13 is in a compressed state in the open-ended sleeve 5. When the rotating shaft 10 rotates, the fixing member 11 and the compression plate 12 thereon rotate around the center line of the rotating shaft 10. When the compression plate 12 rotates to the opening of the open-ended sleeve 5, the open-ended sleeve 5 no longer limits the compression plate 12, and the elastic force of the first spring 13 pushes the compression plate 12 downward to detect whether there is air leakage in the air cushion below. The telescopic column 14 limits the compression plate 12 to prevent it from shaking left and right, increasing its stability to improve the detection quality. The compression plates 12 in the two open-ended sleeves 5 are arranged staggeredly to reduce the possibility of missed detection;

[0033] At the opening of each open sleeve 5, a number of elastic strips 15 for assisting the compression spring 13 are fixedly installed, and each compression plate 12 is arranged in an arc shape to reduce the friction between it and the inner wall of the open sleeve 5. At the lower end of the opening of each open sleeve 5, a number of pigment bags 16 are fixedly installed. The pigment bags 16 correspond one-to-one with the fixing members 11 and are all made of elastic material. At the lower end of each pigment bag 16, a wedge-shaped groove 17 is provided. On the inner wall of the top of each wedge-shaped groove 17, a coloring strip 18 is fixedly installed. When the lower air cushion leaks air, the compression spring 13 increases the amplitude of pushing the compression plate 12 downward, and pushes the elastic strip 15 and the pigment bag 16 downward together. The two wedge-shaped surfaces on both sides of the wedge-shaped groove 17 open to both sides, so that the coloring strip 18 inside it contacts the surface of the air cushion downward, printing color on the surface of the leaking air cushion. When the air cushion does not leak air, the air cushion provides support for the compression plate 12, making the downward movement amplitude of the compression plate 12 small. At the same time, the air cushion prevents the two wedge-shaped surfaces on both sides of the wedge-shaped groove 17 from opening outward, and the coloring strip 18 cannot contact the surface of the air cushion and cannot print color on the air cushion, effectively marking the leaking air cushion;

[0034] A chute 19 and a limiting groove 20 are provided in each open sleeve 5, respectively located on both sides of its opening and communicating with the opening. A number of sliding plates 21 are provided in each chute 19. Each limiting groove 20 is located on the movement track of the corresponding sliding plate 21, and a magnetic attraction strip 24 is fixedly installed on the inner wall of its end. A magnetic attraction strip 24 is also fixedly installed at the lower end of each sliding plate 21. A fixed block 23 is fixedly installed on each sliding plate 21. A blocking rod 22 is slidably installed in each chute 19. Each blocking rod 22 is fixedly connected to the fixed block 23 on some of the sliding plates 21. Connecting rods 26 are fixedly installed at both ends of each blocking rod 22. An electromagnetic block 27 is fixedly installed at one end of each connecting rod 26. Electromagnetic plates 28 are provided on both sides of each connecting rod 26. Each electromagnetic plate 28 is fixedly installed on the inner wall of the open sleeve 5. An electromagnetic groove 29 is provided on one side of each electromagnetic plate 28. Each electromagnetic block 27 is slidably installed in the electromagnetic groove 29 of the electromagnetic plates 28 on both sides. When the motor 4 works, the electromagnetic plates 28 will be electrified, so that the electromagnetic block 27 drives the connecting rod 26 to slide along the electromagnetic groove 29 to its top. The connecting rods 26 on both sides of the blocking rod 22 rise synchronously, which will cause the blocking rod 22 to drive some of the sliding plates 21 to rise along the chute 19. When the detection is completed, after the motor 4 is powered off, no power is provided to the electromagnetic plates 28 anymore. The electromagnetic plates 28 no longer generate electromagnetic force on the electromagnetic blocks 27. The electromagnetic blocks 27 lose the power to rise. The sliding plate 21 drives the blocking rod 22 to slide down along the chute 19 under the action of gravity, and drives the connecting rods 26 at both ends to reset the electromagnetic blocks 27 at both ends to the bottom of the electromagnetic groove 29. Each sliding plate 21 is made of a hard material, and its movement track at the opening of the open sleeve 5 is located between the pigment bag 16 and the elastic strip 15. When the lower end of the sliding plate 21 slides into the limiting groove 20, the magnetic attraction strips 24 attract each other, making it difficult for the sliding plate 21 to slide. At the same time, the sliding plate 21 prevents the compression plate 12 at the opening from pressing down, and will not push out the coloring strip 18 in the lower pigment bag 16;

[0035] A limiting rod 30 is slidably installed in each gear lever 22. A second spring 31 is fixedly connected between one end of each limiting rod 30 and the inner wall of the gear lever 22. A plurality of clamping members 32 cooperating with the fixing blocks 23 are fixedly installed on each limiting rod 30. The clamping members 32 and the fixing blocks 23 not fixedly connected to the gear lever 22 are in one-to-one correspondence. A plurality of clamping grooves 33 for limiting the clamping members 32 are provided on each gear lever 22. The clamping grooves 33 and the clamping members 32 are in one-to-one correspondence, and the clamping members 32 are slidably installed in the clamping grooves 33. A slide rail 25 is provided in each chute 19. One end of each limiting rod 30 is slidably installed in the slide rail 25. A rectangular groove 35 is provided in the bracket 1. A push rod 34 is slidably installed in the rectangular groove 35. Both ends of the push rod 34 are fixedly connected to the slide rails 25 in the two opening sleeves 5. A threaded rod 36 is rotatably installed on the push rod 34. The threaded rod 36 is threadedly connected to the bracket 1, and a knob 7 is fixedly installed at one end thereof. When the knob 7 is rotated, the threaded rod 36 rotates synchronously, and drives the push rod 34 and the slide rail 25 to move horizontally. The slide rail 25 limits the end of the limiting rod 30. When the slide rail 25 moves, the limiting rod 30 also slides in the gear lever 22, and drives the clamping member 32 on the limiting rod 30 to slide along the clamping groove 33. Different gears are selected according to the detected shape of the air cushion film. When the air cushion film is columnar, if all the compression plates 12 are used for detection, the airbag may be damaged due to too large a force area. When the air cushion film is bubble-shaped, all the compression plates 12 are required for comprehensive detection. Before the motor 4 works, select the corresponding gear first. When detecting the columnar air cushion film, turn the knob 7 outwards to drive the slide rail 25 to move outwards. The elastic force of the second spring 31 causes the limiting rod 30 to drive the clamping member 32 to move outwards, and the clamping member 32 does not limit the fixing block 23. When the motor 4 works, only part of the slide plate 21 is driven by the gear lever 22 to move upwards, so that the compression plates 12 in some areas can be pressed down to the air cushion film and detected. When detecting the bubble-shaped air cushion film, first turn the knob 7 inwards to make the slide rail 25 move inwards. The slide rail 25 pushes the limiting rod 30 to slide towards the inside of the gear lever 22 and compresses the second spring 31, so that the clamping member 32 is limited to the fixing block 23. When the motor 4 works, the gear lever 22 can drive all the slide plates 21 to move upwards, so that all the compression plates 12 in all areas can compress the air cushion film for detection, improving the detection quality;

[0036] A pigment detection device 3 for detecting the quantity of pigments on the air cushion film is fixedly installed on the support 1. A limiting plate 6 for limiting the air cushion film is fixedly installed on the support 1. The limiting plate 6 is located above the conveyor belt 2, and one end of it is set to be an arc shape convenient for placing the air cushion film. An observation port 37 is provided on the limiting plate 6. The observation port 37 is located below the pigment detection device 3 to delimit the detection range. When the pigment detection device 3 detects that the quantity of pigments in the observation port 37 is greater than a predetermined value, it indicates that this part of the air cushion film is unqualified and cannot be used for subsequent packaging. The motor 4 and the conveyor belt 2 will both stop working, and an alarm will be issued to notify the staff, reducing the situation of using unqualified air cushion film for packaging.

[0037] Specifically, before detection, select the corresponding gear according to the air cushion shape of the air cushion film. When detecting the air column-shaped air cushion film, turn the knob 7 outward to drive the slide rail 25 to move outward. The elastic force of the second spring 31 causes the limit rod 30 to drive the clamping member 32 to move outward, and the clamping member 32 does not limit the fixed block 23. The stop rod 22 can only drive part of the slide plate 21 to rise. When detecting the bubble-shaped air cushion film, first turn the knob 7 inward to make the slide rail 25 move inward. The slide rail 25 pushes the limit rod 30 to slide into the stop rod 22 and compresses the second spring 31, so that the clamping member 32 is limited to the fixed block 23. The stop rod 22 will drive all the slide plates 21 to rise. When the motor 4 works, the electromagnetic plate 28 will be energized, so that the electromagnetic block 27 drives the connecting rod 26 to slide along the electromagnetic groove 29 to its top. The connecting rods 26 on both sides of the stop rod 22 rise synchronously, which will cause the stop rod 22 to drive the slide plate 21 to rise along the chute 19. The slide plate 21 no longer limits the compression plate 12, so that the compression plate 12 can compress the air cushion downward. The first gear 8 at the output end of the motor 4 drives two second gears 9 to rotate, so that the two rotating shafts 10 rotate synchronously. When the compression plate 12 rotates to the opening of the opening sleeve 5, the opening sleeve 5 no longer limits the compression plate 12. The elastic force of the first spring 13 pushes the compression plate 12 downward to detect whether the air cushion below leaks. The compression plates 12 in the two opening sleeves 5 are arranged staggeredly to reduce the possibility of missed detection. When the air cushion below leaks, the elastic force of the first spring 13 increases the amplitude of pushing the compression plate 12 downward, and pushes the elastic strip 15 and the pigment bag 16 downward. The wedge-shaped surfaces on both sides of the wedge-shaped groove 17 open to both sides, so that the coloring strip 18 inside it contacts the air cushion surface downward, and prints color on the leaking air cushion surface. When the air cushion does not leak, the air cushion provides support for the compression plate 12, so that the downward movement amplitude of the compression plate 12 is not large. At the same time, the air cushion prevents the wedge-shaped surfaces on both sides of the wedge-shaped groove 17 from opening outward, and the coloring strip 18 cannot contact the air cushion surface and cannot print color on the air cushion, effectively marking the leaking air cushion. When the conveyor belt 2 transports the air cushion film after air leakage detection to below the pigment detection device 3, if the pigment detection device 3 detects that the amount of pigment in the observation port 37 is greater than the predetermined value, it means that this part of the air cushion film is unqualified and cannot be used for subsequent packaging. The motor 4 and the conveyor belt 2 will stop working and an alarm will be issued to notify the staff. When all detections are completed, the motor 4 is powered off and does not work. The electromagnetic block 27 loses power. The slide plate 21 drives the stop rod 22 to slide downward along the chute 19 under the action of gravity, and drives the connecting rods 26 at both ends to reset the electromagnetic blocks 27 at both ends to the bottom of the electromagnetic groove 29. Each slide plate 21 is made of a rigid material, and its movement trajectory at the opening of the opening sleeve 5 is located between the pigment bag 16 and the elastic strip 15. When the lower end of the slide plate 21 slides into the limit groove 20, the magnetic attraction strips 24 attract each other, making the slide plate 21 not easy to slide. At the same time, the slide plate 21 prevents the compression plate 12 at the opening from pressing downward and will not push out the coloring strip 18 in the lower pigment bag 16.

[0038] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0039] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A material delivery detection mechanism for a packaging machine, comprising a bracket (1) and a conveyor belt (2) fixedly mounted on the bracket (1), characterized in that: Two open sleeves (5) are fixedly mounted on the bracket (1), the open end of each open sleeve (5) faces downward, a rotating shaft (10) is arranged inside each open sleeve (5), each rotating shaft (10) is rotatably mounted on the bracket (1), a second gear (9) is fixedly mounted on one end of each rotating shaft (10), a motor (4) is fixedly mounted on the bracket (1), a first gear (8) is fixedly mounted on the output end of the motor (4), and the first gear (8) is synchronously meshed with the second gears (9) on the two rotating shafts (10); A plurality of fixing members (11) are fixedly mounted on each of the rotating shafts (10), a plurality of compression plates (12) are arranged on each of the fixing members (11), a plurality of springs (13) and a plurality of telescopic columns (14) are fixedly connected between each of the compression plates (12) and the fixing members (11), and each of the springs (13) is in a compressed state in the open sleeve (5), the compression plates (12) in the two open sleeves (5) are arranged in a staggered manner, a plurality of pigment bags (16) are fixedly mounted on the lower end of the opening of each of the open sleeves (5), the pigment bags (16) correspond to the fixing members (11) one by one, and are all made of elastic material, a wedge-shaped groove (17) is arranged on the lower end of each of the pigment bags (16), and a coloring strip (18) is fixedly mounted on the inner wall of the top of each of the wedge-shaped grooves (17), and a pigment detection device (3) for detecting the amount of pigment on the air cushion film is fixedly mounted on the bracket (1).

2. A material delivery detection mechanism for packaging machinery according to claim 1, characterized in that: Each of the opening sleeves (5) is provided with a slide groove (19) and a limit groove (20), which are respectively located on both sides of the opening and are connected to the opening. Each of the slide grooves (19) is provided with a plurality of slide plates (21), and each of the slide plates (21) is fixedly mounted with a fixed block (23). Each of the slide grooves (19) is slidably mounted with a blocking rod (22), and each of the blocking rods (22) is fixedly connected to the fixed block (23) on a part of the slide plates (21).

3. A material delivery detection mechanism for packaging machinery according to claim 2, characterized in that: Each of the blocking rods (22) is fixedly mounted with a connecting rod (26) at both ends, and an electromagnetic block (27) is fixedly mounted at one end of each of the connecting rods (26). Electromagnetic plates (28) are provided on both sides of each of the connecting rods (26), and each of the electromagnetic plates (28) is fixedly mounted on the inner wall of the opening sleeve (5). An electromagnetic slot (29) is provided on one side of each of the electromagnetic plates (28), and each of the electromagnetic blocks (27) is slidably mounted in the electromagnetic slots (29) of the electromagnetic plates (28) on both sides.

4. The material delivery detection mechanism for packaging machinery according to claim 2, characterized in that: A limiting rod (30) is slidably installed in each of the blocking rods (22), and a spring (31) is fixedly connected between one end of each of the limiting rods (30) and the inner wall of the blocking rod (22). A plurality of clamping members (32) cooperating with the fixed block (23) are fixedly installed on each of the limiting rods (30), and the clamping members (32) correspond one-to-one with the fixed block (23) not fixedly connected to the blocking rod (22). A plurality of clamping grooves (33) for limiting the clamping members (32) are provided on each of the blocking rods (22), and the clamping grooves (33) correspond one-to-one with the clamping members (32), and the clamping members (32) are slidably installed in the clamping grooves (33). A slide rail (25) is provided in each of the slide grooves (19), and one end of each of the limiting rods (30) is slidably installed in the slide rail (25).

5. A material delivery detection mechanism for packaging machinery according to claim 4, characterized in that: A rectangular groove (35) is provided in the bracket (1), a push rod (34) is slidably mounted in the rectangular groove (35), two ends of the push rod (34) are respectively fixedly connected to the slide rails (25) in the two open sleeves (5), a threaded rod (36) is rotatably mounted on the push rod (34), the threaded rod (36) is connected to the bracket (1) by a thread, and a knob (7) is fixedly mounted on one end of the push rod (34).

6. The material delivery detection mechanism for packaging machinery according to claim 1, characterized in that: A plurality of elastic strips (15) for assisting the compression spring 1 (13) are fixedly mounted at the opening of each of the open sleeves (5), and each of the compression plates (12) is arranged in an arc shape to reduce friction between it and the inner wall of the open sleeve (5).

7. The material delivery detection mechanism for packaging machinery according to claim 2, characterized in that: Each of the limiting grooves (20) is located on the movement track of the corresponding slide plate (21), and a magnetic attraction strip (24) is fixedly mounted on the inner wall of the end portion thereof. A magnetic attraction strip (24) is also fixedly mounted on the lower end of each of the slide plates (21).

8. The material delivery detection mechanism for packaging machinery according to claim 1, characterized in that: A limiting plate (6) for limiting the position of the air cushion film is fixedly mounted on the bracket (1); the limiting plate (6) is located above the conveyor belt (2), and one end of the limiting plate is arranged in an arc shape for facilitating the placement of the air cushion film.

9. A material delivery detection mechanism for packaging machinery according to claim 8, characterized in that: An observation port (37) is provided on the limit plate (6); the observation port (37) is located below the pigment detection device (3) and defines a detection range thereof.

10. The material delivery detection mechanism for packaging machinery according to claim 2, characterized in that: Each of the slide plates (21) is made of a hard material, and its movement track at the opening of the open sleeve (5) is located between the paint bag (16) and the elastic strip (15).

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