Paper bag defective product removing machine

Abstract

The application discloses a paper bag defective product removing machine, which comprises a blanking conveying mechanism, a CCD camera, a defective product removing mechanism and a good product conveying mechanism. The CCD camera is located above the blanking conveying mechanism, and the good product conveying mechanism is located at the end of the blanking conveying mechanism and below the blanking conveying mechanism. When the paper bag is a good product, the paper bag falls from the end of the blanking conveying mechanism to the good product conveying mechanism under the action of gravity and is conveyed. The defective product removing mechanism is located at the end of the blanking conveying mechanism and comprises a first rotating piece and a defective product output module. When the paper bag is a defective product, the first rotating piece adsorbs the paper bag, rotates the paper bag to the defective product output module and releases the paper bag, and the defective product output module conveys the paper bag. Compared with the prior art, the paper bag defective product removing machine can automatically identify defective products and automatically remove the defective products, reduces manual work, improves work efficiency and reduces the error rate.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of paper bag manufacturing equipment, and particularly relates to a paper bag defective product removing machine. BACKGROUND

[0002] When paper bags are manufactured, they often need to go through multiple processes to be made, and each process produces semi-finished products that need to be detected for qualification before being taken to the next process for use.

[0003] The process of detection and removal of defective products is often completed manually by workers. Workers stand on the conveying table of the feeding device and stare at each passing paper bag semi-finished product with their eyes. If a defective product is found, it is manually removed. This traditional approach requires workers to stare for a long time, which causes eye fatigue. Once people are tired, they are more likely to make mistakes, which can result in defective products not being accurately removed. In addition, since the workers rely on their naked eyes to distinguish, the conveying speed of the feeding device must be slow. If it is too fast, the workers cannot keep up. Therefore, the efficiency of naked eye identification and removal of defective products is extremely low.

[0004] Therefore, there is an urgent need for a paper bag defective product removing machine that can automatically identify and remove defective products to overcome the above-mentioned defects. SUMMARY

[0005] The present application aims to provide a paper bag defective product removing machine that can automatically identify and remove defective products.

[0006] To achieve the above-mentioned purpose, the paper bag defective product removing machine of the present application comprises a feeding conveying mechanism for conveying paper bags, a CCD camera for shooting the paper bags, a defective product removing mechanism for removing defective paper bags, and a good product conveying mechanism for outputting good paper bags. The CCD camera is located above the feeding conveying mechanism, and the good product conveying mechanism is located at the end of the feeding conveying mechanism and below the feeding conveying mechanism. When the paper bag is a good product, it falls from the end of the feeding conveying mechanism to the good product conveying mechanism under the action of gravity and is conveyed. The defective product removing mechanism is located at the end of the feeding conveying mechanism, and the defective product removing mechanism comprises a first rotating member for adsorbing the paper bag and a defective product output module for conveying the defective paper bag. The first rotating member is arranged at the end of the feeding conveying mechanism and is rotatably arranged. When the paper bag is a defective product, the first rotating member adsorbs the paper bag and rotates it to the defective product output module and releases it, and the defective product output module conveys the paper bag.

[0007] Compared with the prior art, the paper bag defective product removing machine has the cooperation among the CCD camera, the blanking conveying mechanism, the defective product removing mechanism and the good product conveying mechanism, blanks the paper bag by the blanking conveying mechanism, takes a picture of the paper bag in the blanking conveying process by the CCD camera and feeds the image to the background, if the paper bag is a good product, the defective product removing mechanism does not act, the paper bag falls from the end of the blanking conveying mechanism to the good product conveying mechanism under the action of gravity, the good product conveying mechanism conveys the paper bag, if the paper bag is a defective product, the defective product removing mechanism adsorbs the paper bag by the first rotating piece and drives the paper bag to rotate around the first rotating piece to the defective product output module and then releases the paper bag, the defective product output module conveys the paper bag. Therefore, the paper bag defective product removing machine can automatically identify the defective product and automatically remove the defective product, reduces the labor of manual work, improves the work efficiency and reduces the error rate.

[0008] Preferably, the first rotating piece is a rotatable disc structure, and the disc structure further has a gap, and a suction cup is arranged in the gap.

[0009] Preferably, the defective product removing mechanism further comprises a first driving shaft, the first driving shaft passes through the center of the first rotating piece, the first rotating piece is sleeved on the first driving shaft, and rotation of the first driving shaft drives the first rotating piece to rotate.

[0010] Preferably, the defective product removing mechanism further comprises a reversing and clamping module for reversing and clamping conveying of the adsorbed paper, the reversing and clamping module is arranged adjacent to the first rotating piece, and the defective product output module is arranged adjacent to the reversing and clamping module.

[0011] Preferably, the reversing and clamping module comprises a clamping belt that makes rotary motion and a second rotating piece that can rotate, a gap is formed between the outer wall surface of the first rotating piece and the outer side surface of the second rotating piece, the outer side surface of the second rotating piece is a first clamping surface, the surface of the clamping belt facing the second rotating piece is a second clamping surface, the first clamping surface and the second clamping surface have at least one tangent position, the first clamping surface and the second clamping surface rotate in the same direction, the paper bag is wound in the tangent position from the gap, and the first clamping surface and the second clamping surface of the tangent position clamp and simultaneously convey the paper bag.

[0012] Preferably, the second clamping surface of the clamping belt is in close contact with the side wall of the second rotating piece until the top wall, and when the clamping belt and the second rotating piece roll in the same direction at the same time, the paper bag is reversed from a vertical state to a horizontal state.

[0013] Preferably, the reversing and clamping module further comprises a second driving shaft, the second driving shaft passes through the center of the second rotating piece, and the second rotating piece is sleeved on the second driving shaft.

[0014] Preferably, the reversing and clamping module further comprises a clamping belt module, the clamping belt module comprises a wheel mounting frame, a first belt pulley, a second belt pulley and a third belt pulley mounted on the wheel mounting frame, the second belt pulley and the third belt pulley are arranged in a horizontal direction and are spaced apart, the first belt pulley is arranged below the second belt pulley, the clamping belt is wound on the first belt pulley, the second belt pulley and the third belt pulley, the second rotating member is located below the second belt pulley and the third belt pulley and presses upward against the second clamping surface, so that the second clamping surface has a horizontal first conveying surface and a second conveying surface intersecting with the first conveying surface, and at least one of the first belt pulley, the second belt pulley and the third belt pulley is driven to rotate.

[0015] Preferably, the clamping belt module further comprises a first tensioning pulley, a second tensioning pulley and a third tensioning pulley, the first tensioning pulley, the second tensioning pulley and the third tensioning pulley are arranged in sequence and located between the second belt pulley and the third belt pulley, the height of the second tensioning pulley is lower than that of the first tensioning pulley and the third tensioning pulley, the clamping belt is wound on the second belt pulley, the first tensioning pulley, the second tensioning pulley, the third tensioning pulley, the third belt pulley and the first belt pulley, and at least one of the second belt pulley, the first tensioning pulley, the second tensioning pulley, the third tensioning pulley, the third belt pulley and the first belt pulley is driven to rotate.

[0016] Preferably, the defective product removal mechanism further comprises a power module mounted on a support plate, the power module comprises a driving motor, a driving pulley, a first driven pulley, a second driven pulley, a third driven pulley, a first chain, a second chain and a third chain, the driving motor is mounted on the support plate, the driving motor is connected with the driving pulley, the first chain is sleeved on the driving pulley and the first driven pulley, the second chain is sleeved on the driving pulley and the second driven pulley, the third chain is sleeved on the second driven pulley and the third driven pulley, the first driven pulley drives the rotation of the first rotating member, and the second driven pulley drives the conveying movement of the defective product output module. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a perspective view of a paper bag defective product removal machine according to the present application.

[0018] Figure 2 FIG. 2 is a perspective view of another angle of the paper bag defective product removal machine according to the present application.

[0019] Figure 3 FIG. 3 is a perspective view of a defective product removal mechanism of the paper bag defective product removal machine according to the present application.

[0020] Figure 4 is Figure 3 another perspective view of the defective product discharging mechanism.

[0021] Figure 5 is a perspective view of the cooperation between the first rotating member and the reversing and clamping module of the present application.

[0022] Figure 6 is a front view of Figure 5 . DETAILED DESCRIPTION

[0023] In order to describe the technical content and structural features of the present application in detail, the following further description is made in combination with the embodiments and the accompanying drawings.

[0024] Referring to Figures 1 to 6 , the paper bag defective product discharging machine 100 of the present application comprises a blank conveying mechanism 1 for conveying paper bags, a CCD camera 2 for determining whether the paper bag is a defective product, a defective product discharging mechanism 3 for discharging the defective product paper bag, and a good product conveying mechanism 4 for outputting the good product paper bag. The CCD camera 2 is located above the blank conveying mechanism 1, and the good product conveying mechanism 4 is located at the end of the blank conveying mechanism 1 and below the blank conveying mechanism 1. When the paper bag is a good product, the paper bag falls from the end of the blank conveying mechanism 1 under the action of gravity and is conveyed on the good product conveying mechanism 4; the defective product discharging mechanism 3 is located at the end of the blank conveying mechanism 1, and the defective product discharging mechanism 3 comprises a first rotating member 31 for adsorbing the paper bag and a defective product output module 32 for conveying the defective product paper bag, the first rotating member 31 is arranged at the end of the blank conveying mechanism 1, when the paper bag is a defective product, the first rotating member 31 adsorbs the paper bag and rotates the paper bag to the defective product output module 32 and then releases the paper bag, and the defective product output module 32 conveys the paper bag. It can be understood that a control module is also included, which is in electrical connection with the CCD camera 2, the defective product discharging mechanism 3, the blank conveying mechanism 1, and the good product conveying mechanism 4. The control between the control module and the CCD camera 2, the defective product discharging mechanism 3, the blank conveying mechanism 1, and the good product conveying mechanism 4 is well known to those skilled in the art, and therefore will not be described here. Specifically, in the present embodiment, the blank conveying mechanism 1 and the defective product output module are a conveying belt structure, which is well known to those skilled in the art, and therefore will not be described here. Specifically, the good product conveying mechanism is a roller structure, of course, it can also be a conveying belt structure, therefore, it is not limited to this, the roller structure is also well known to those skilled in the art, and therefore will not be described here. Preferably, the paper bag defective product discharging machine 100 of the present application further comprises an illuminating member 5, which is arranged above the blank conveying mechanism 1, thereby providing illumination for the CCD camera 2 to shoot, making the shooting more clear.

[0025] Compared with the prior art, the paper bag defective product removing machine 100 of the present application cooperates among the CCD camera 2, the blanking conveying mechanism 1, the defective product removing mechanism 3 and the good product conveying mechanism 4, blanks the paper bag by means of the blanking conveying mechanism 1, takes a picture of the paper bag during the blanking conveying process by means of the CCD camera 2 and feeds the image to the background, if the paper bag is a good product, the defective product removing mechanism 3 does not act, the paper bag falls from the end of the blanking conveying mechanism 1 to the good product conveying mechanism 4 under the action of gravity, and the good product conveying mechanism 4 conveys the paper bag, if the paper bag is a defective product, the defective product removing mechanism 3 adsorbs the paper bag by means of the first rotating part 31 and drives the paper bag to rotate around it to the defective product output module 32 before releasing, and the defective product output module 32 conveys the paper bag. Therefore, the paper bag defective product removing machine 100 of the present application can automatically identify defective products and automatically discharge the defective products, reduce the labor of manual work, improve the work efficiency and reduce the error rate. More specifically, as follows:

[0026] Please refer to Figures 3 to 6 , the first rotating part 31 is a rotatable disc structure, the disc structure also has a notch 311, and a suction cup 312 is arranged in the notch 311. Specifically, the notch 311 is a fan-shaped opening structure, but it is not limited thereto. Preferably, the top of the suction cup 312 protrudes outward from the outer side wall of the first rotating part 31, of course, in other embodiments, the top of the suction cup 312 is flush with the outer side of the first rotating part 31. Thus, it is better to adsorb the paper bag after positioning. Specifically, the length direction of the suction cup 312 is the radial direction of the disc mechanism. Initially, the suction cup 312 is inclined towards the end of the blanking conveying mechanism 1, if it is judged as a defective product, the suction cup 312 is started, adsorbs the paper bag by means of suction force, the first rotating part 31 rotates at the same time, after rotating to a predetermined angle, the suction force of the suction cup 312 disappears, and the suction cup 312 releases the paper bag. The first rotating part 31 rotates back to the initial position in the same direction.

[0027] Please refer to Figures 3 to 6 , the defective product removing mechanism 3 further comprises a support plate 33 and a first driving shaft 34. The support plate 33 is two and is arranged in a spaced apart manner. The first driving shaft 34 is located between the two support plates 33 and is respectively pivoted to the support plates 33. Specifically, the first driving shaft 34 passes through the center of the first rotating part 31, the first rotating part 31 is sleeved on the first driving shaft 34, and the rotation of the first driving shaft 34 drives the rotation of the first rotating part 31. For example, in this embodiment, the first rotating part 31 is one, of course, in other embodiments, the first rotating part 31 is at least two and is sleeved on the first driving shaft 34 in a spaced apart manner, the first driving shaft 34 simultaneously drives all the first rotating parts 31 to rotate, so it is not limited thereto.

[0028] Please refer to Figures 3 to 6The defective product removing mechanism 3 further comprises a reversing and clamping module for reversing and clamping conveying the paper after adsorption. The reversing and clamping module is adjacent to the first rotating member 31, and the defective product output module 32 is adjacent to the reversing and clamping module. By cooperating with the first rotating member 31, the reversing and clamping module reverses the paper bag after adsorption by the first rotating member 31, so that the first rotating member 31 has more time to reset after releasing the paper bag. At the same time, the reversing and clamping module can discharge the paper bag in a more optimal direction, so that the placement position of the defective product output module 32 can be more reasonably arranged. Specifically, the reversing and clamping module comprises a clamping belt 361 rotating and a second rotating member 38 which can rotate. The outer wall surface of the first rotating member 31 and the outer side surface of the second rotating member 38 have a gap. The outer side surface of the second rotating member 38 is a first clamping surface 381. The surface of the clamping belt 361 facing the second rotating member 38 is a second clamping surface 3611. The first clamping surface 381 and the second clamping surface 3611 have at least one tangent position. The first clamping surface 381 and the second clamping surface 3611 rotate in the same direction. The paper bag is wound in the tangent position from the gap. The first clamping surface 381 and the second clamping surface 3611 in the tangent position clamp and simultaneously convey the paper bag. Specifically, the defective product output module 32 is adjacent to the second rotating member 38 and located below the second clamping surface 3611. Of course, in other embodiments, the reversing and clamping module can be a second rotating member which is the same structure as the first rotating member 31. The rotating direction of the first rotating member 31 is opposite to that of the second rotating member. When the paper is turned to be opposite to the suction disc 312 of the second rotating member, the suction disc of the second rotating member adsorbs the paper bag, thereby completing the reversing. Therefore, the specific structure of the reversing and clamping module is not limited thereto.

[0029] Specifically, the second clamping surface 3611 of the clamping belt 361 is in close contact with the side wall of the second rotating member 38 until the top wall. When the clamping belt 361 and the second rotating member 38 roll in the same direction at the same time, the paper bag is reversed from vertical to horizontal. It can be understood that the paper bag is vertical when it enters the tangent position from the gap, and is switched to horizontal by the guidance of the clamping belt 361.

[0030] Please refer to Figures 3 to 6The reversing and clamping module further comprises a second driving shaft 37, the second driving shaft 37 passes through the center of a second rotating member 38, and the second rotating member 38 is sleeved on the second driving shaft 37. In the embodiment, preferably, two second rotating members 38 are arranged on the second driving shaft 37. Of course, in other embodiments, the number of the second rotating members 38 can be one or three or four, and is not limited thereto. Specifically, the two ends of the second driving shaft 37 are respectively pivotally connected to two support plates 33, so that the second driving shaft 37 is rotatably arranged. In the embodiment, the second rotating member 38 is adjacent to the clamping belt 361, so that the rotation of the clamping belt 361 drives the rotation of the second rotating member 38. Of course, the second rotating member 38 can also be connected to a driving source, and the rotation speed is consistent with that of the clamping belt 361, and is not limited thereto. Specifically, in the embodiment, the reversing and clamping module is two groups and is arranged in a spaced manner along the axial direction of the second driving shaft 37. Of course, in other embodiments, according to the size of the paper bag, the reversing and clamping module can be three groups or four groups, and is not limited thereto.

[0031] Please refer to Figures 5 to 6The reversing and clamping module further comprises a clamping belt module 36, which comprises a wheel mounting frame 362, a first belt wheel 364, a second belt wheel 365 and a third belt wheel 366 mounted on the wheel mounting frame 362. The second belt wheel 365 and the third belt wheel 366 are arranged horizontally and spaced apart, and the first belt wheel 364 is arranged below the second belt wheel 365, so that the first belt wheel 364, the second belt wheel 365 and the third belt wheel 366 form a triangular structure. The clamping belt 361 is wound around the first belt wheel 364, the second belt wheel 365 and the third belt wheel 366. The second rotating part 38 is located below the second belt wheel 365 and the third belt wheel 366 and presses upward against the second clamping surface 3611, so that the second clamping surface 3611 has a horizontal first conveying surface 36111 and a second conveying surface 36112 intersecting with the first conveying surface 36111. It can be understood that the second conveying surface 36112 is a vertical surface or is arranged obliquely. At least one of the first belt wheel 364, the second belt wheel 365 and the third belt wheel 366 is driven to rotate. Preferably, in the embodiment, the clamping belt module 36 further comprises a first tensioning wheel 367, a second tensioning wheel 368 and a third tensioning wheel 369. By means of the three tensioning wheels, the rotation of the clamping belt 361 is more stable and reliable. The first tensioning wheel 367, the second tensioning wheel 368 and the third tensioning wheel 369 are arranged in sequence and located between the second belt wheel 365 and the third belt wheel 366. The height of the second tensioning wheel 368 is lower than that of the first tensioning wheel 367 and the third tensioning wheel 369. The clamping belt 361 is wound around the second belt wheel 365, the first tensioning wheel 367, the second tensioning wheel 368, the third tensioning wheel 369, the third belt wheel 366 and the first belt wheel 364. At least one of the second belt wheel 365, the first tensioning wheel 367, the second tensioning wheel 368, the third tensioning wheel 369, the third belt wheel 366 and the first belt wheel 364 is driven to rotate. Specifically, in the embodiment, the second tensioning wheel 368 is driven to rotate, thereby driving the clamping belt 361 and all other wheels to rotate together.

[0032] Please refer to Figure 4The defective product removing mechanism 3 further comprises a power module 39 mounted on one of the support plates 33. Specifically, the power module 39 comprises a driving motor 391, a driving wheel 392, a first driven wheel 393, a second driven wheel 394, a third driven wheel 395, a first chain 396, a second chain 397 and a third chain 398. The driving motor 391 is mounted on the support plate 33, and is connected with the driving wheel 392. The first chain 396 is sleeved on the driving wheel 392 and the first driven wheel 393. The second chain 397 is sleeved on the driving wheel 392 and the second driven wheel 394. The third chain 398 is sleeved on the second driven wheel 394 and the third driven wheel 395. It can be understood that the driving wheel 392 and the second driven wheel 394 are double chain wheel structures. Specifically, one end of the first driving shaft 34 is connected with the first driven wheel 393, so that the first driven wheel 393 drives the first driving shaft 34 to rotate and drives the first rotating member 31. It can be understood that the defective product output module 32 is a conveyor belt structure, which is well known to those skilled in the art, and will not be described here. The second driven wheel 394 is connected with the defective product output module 32, thereby driving the defective product output module 32 to move in a conveying manner. Specifically, the second tensioning wheel 368 is sleeved on the third driving shaft 399, and one end of the third driving shaft 399 is connected with the third driven wheel 395. Therefore, the third driven wheel 395 drives the third driving shaft 399 to rotate, thereby driving the second reversing wheel to rotate, and driving the clamping belt 361 and the second rotating member 38 to rotate together.

[0033] Preferably, in the present embodiment, a height adjusting assembly 363 for adjusting the height of the second tensioning wheel is further included. Specifically, the height adjusting assembly 363 comprises a driving hand wheel 3631, a fixed frame 3632 and a sliding seat 3633. The fixed frame 3632 is fixedly arranged on the wheel mounting frame 362, and the sliding seat 3633 is slidingly arranged on the fixed frame 3632 and can slide up and down. The driving hand wheel 3631 comprises a head portion 36311 and a body portion 36312 arranged integrally, the head portion 36311 is exposed outside the fixed frame 3632, and the body portion 36312 is connected with the sliding seat 3633 through the fixed frame 3632. The outer side wall of the body portion 36312 has external threads. The rotation of the driving hand wheel 3631 can drive the sliding seat 3633 to move up and down, so as to adjust the height of the sliding seat 3633. It can be understood that the height adjusting assembly 363 is two and is arranged spaced apart along the axial direction of the third driving shaft 399, and the two ends of the third driving shaft 399 are respectively connected with the sliding seats 3633 on the two sides.

[0034] The working principle of the paper bag defective product removing machine 100 of the present application is described in combination with the drawings: the paper bag is uniformly conveyed by the blank conveying mechanism 1, the CCD camera 2 takes a picture and feeds it back to the background information comparison, if the paper bag is a good product, the suction cup 312 in the defective product removing mechanism 3 does not adsorb, the paper bag falls from the end of the blank conveying mechanism 1 to the good product conveying mechanism 4, and the good product is conveyed by the good product conveying mechanism 4. If the paper bag is a defective product, the suction cup 312 in the defective product removing mechanism 3 adsorbs the paper bag at the end, and under the action of the power module 39, the first rotating part 31 also drives the suction cup 312 and the paper bag to rotate together until the paper bag enters the tangent position between the first clamping surface 381 and the second clamping surface 3611 from the gap, the paper bag is switched from the first conveying surface 36111 to the second conveying surface 36112, so as to be guided from vertical to horizontal, and at the same time, under the action of the second clamping surface 3611, it is guided and falls on the defective product output module 32, and the defective product is conveyed by the defective product output module 32.

[0035] The above only discloses the preferred examples of the present application, and cannot limit the scope of the rights of the present application, so the equivalent changes made according to the claims of the present application all belong to the scope covered by the present application.

Claims

1. A paper bag defective product removing machine characterized by comprising: The application relates to a paper bag conveying device, which comprises a paper bag conveying mechanism, a CCD camera, a defective product exclusion mechanism and a good product conveying mechanism, wherein the CCD camera is arranged above the paper bag conveying mechanism, the good product conveying mechanism is arranged at the end of the paper bag conveying mechanism and below the paper bag conveying mechanism, the defective product exclusion mechanism is arranged at the end of the paper bag conveying mechanism, the defective product exclusion mechanism comprises a first rotating member, a reversing and clamping module and a defective product output module, the first rotating member is arranged at the end of the paper bag conveying mechanism and can rotate, the reversing and clamping module is arranged adjacent to the first rotating member, and the defective product output module is arranged adjacent to the reversing and clamping module.

2. The paper sack culls machine according to claim 1, wherein The first rotating member is a rotatable disc structure, and the disc structure further has a notch, wherein a suction disc is arranged in the notch.

3. The paper sack culls machine of claim 2 wherein, The defective product exclusion mechanism further comprises a first driving shaft, the first driving shaft passes through the center of the first rotating member, the first rotating member is sleeved on the first driving shaft, and the rotation of the first driving shaft drives the rotation of the first rotating member.

4. The paper sack culls machine of claim 1 wherein, The second clamping surface of the clamping belt is tightly attached to the side wall and top wall of the second rotating member, and when the clamping belt and the second rotating member roll in the same direction at the same time, the paper bag is changed from a vertical state to a horizontal state.

5. The paper sack culls machine of claim 1 wherein, The reversing and clamping module further comprises a second driving shaft, the second driving shaft passes through the center of the second rotating member, and the second rotating member is sleeved on the second driving shaft.

6. The paper sack culls machine of claim 1 wherein, The reversing and clamping module further comprises a clamping belt module, the clamping belt module comprises a wheel mounting frame, a first belt pulley, a second belt pulley and a third belt pulley mounted on the wheel mounting frame, the second belt pulley and the third belt pulley are arranged in a horizontal direction, the first belt pulley is arranged below the second belt pulley, the clamping belt is wound on the first belt pulley, the second belt pulley and the third belt pulley, the second rotating part is located below the second belt pulley and the third belt pulley and presses upward against the second clamping surface, so that the second clamping surface has a horizontal first conveying surface and a second conveying surface intersecting with the first conveying surface, at least one of the first belt pulley, the second belt pulley and the third belt pulley is driven to rotate.

7. The paper sack culls machine of claim 6 wherein, The clamping belt module further comprises a first tensioning pulley, a second tensioning pulley and a third tensioning pulley, the first tensioning pulley, the second tensioning pulley and the third tensioning pulley are arranged in sequence and located between the second belt pulley and the third belt pulley, the height of the second tensioning pulley is lower than that of the first tensioning pulley and the third tensioning pulley, the clamping belt is wound on the second belt pulley, the first tensioning pulley, the second tensioning pulley, the third tensioning pulley, the third belt pulley and the first belt pulley, at least one of the second belt pulley, the first tensioning pulley, the second tensioning pulley, the third tensioning pulley, the third belt pulley and the first belt pulley is driven to rotate.

8. The paper sack rejector machine of claim 1 wherein, The defective product removal mechanism further comprises a power module, the power module is mounted on a support plate, the power module comprises a driving motor, a driving pulley, a first driven pulley, a second driven pulley, a third driven pulley, a first chain, a second chain and a third chain, the driving motor is mounted on the support plate, the driving motor is connected with the driving pulley, the first chain is sleeved on the driving pulley and the first driven pulley; the second chain is sleeved on the driving pulley and the second driven pulley; the third chain is sleeved on the second driven pulley and the third driven pulley; the first driven pulley drives the rotation of the first rotating part; the second driven pulley drives the defective product output module to move.

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