Anti-suck-back device of tea packaging machine

Abstract

The anti-suck-back device comprises a workbench, a mounting plate is fixed to one side of the top of the workbench, an unwinding roller is rotationally connected to the top of one side of the mounting plate, and a driving mechanism is mounted on the side, away from the unwinding roller, of the mounting plate and used for driving the unwinding roller to rotate; a first guide roller and a plurality of second guide rollers are rotationally connected to the side, close to the unwinding roller, of the mounting plate and located below the unwinding roller, a tensioning movable rod is arranged on the side, close to the unwinding roller, of the mounting plate and located below the first guide roller, a second connecting disc is fixed to the end of the tensioning movable rod, and the tensioning movable rod is rotationally connected to the mounting plate through the second connecting disc. The probability of suck-back in the tea packaging process is effectively reduced, the suck-back problem can be automatically adjusted and solved under the condition of suck-back, equipment shutdown maintenance operation is not needed, practicability and use convenience are greatly improved, and therefore the production efficiency is improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tea packaging, in particular to a tea packaging machine anti-suck-back device. BACKGROUND

[0002] In the process of tea production, the packaging of tea is an important link. With the development of science and technology, the degree of automation of tea packaging is getting higher and higher, and has gradually developed from traditional manual packaging to automatic packaging. A large number of automatic tea packaging machines have appeared on the market. The automatic packaging principle of the automatic tea packaging machine mostly contains a packaging film unwinding structure, a packaging film guiding structure, a tea feeding structure, a packaging film conveying structure, and a structure for side heat sealing and upper and lower heat sealing and cutting during packaging. During packaging, the packaging film is unwound by the unwinding structure, guided by the guiding structure, heat sealed at the bottom by the upper and lower heat sealing structure, heat sealed at the side by the side heat sealing structure, and then the tea is loaded into the packaging film by the tea feeding structure. After that, the packaging film containing tea is conveyed to the lower part of the upper and lower heat sealing structure by the conveying structure, and then the upper part of the packaging tea is heat sealed and cut by the upper and lower heat sealing structure to complete the packaging.

[0003] However, the conveying of the packaging film by the conveying structure and the unwinding of the packaging film by the unwinding structure are difficult to perfectly coordinate during the above packaging process. In a long packaging process, the conveying length of the packaging film by the conveying structure may be less than the unwinding length of the packaging film by the unwinding structure. At this time, the packaging film outside the guiding structure will be loose and wrinkled, which may cause the unwinding structure to re-wind the loose packaging film during the next unwinding. At this time, the packaging film has a suck-back phenomenon. When the packaging film has a suck-back phenomenon in the traditional packaging process, the equipment needs to be stopped. When the suck-back phenomenon is not serious, the packaging film is manually pulled back to the normal position. When the suck-back phenomenon is serious, the equipment needs to be stopped and the unwinding structure is reversed by the power mechanism to reverse the unwinding of the suck-back packaging film to the normal position. In a more serious case, the suck-back may cause the packaging film to break. At this time, the packaging film needs to be manually replaced and installed. The above processing method affects the production efficiency. If the suck-back is not discovered in time, it may damage the equipment, affect production, and increase costs.

[0004] Therefore, the present application provides a tea packaging machine anti-suck-back device to solve the above technical problems. SUMMARY

[0005] Therefore, it is necessary to provide a tea packaging machine anti-suck-back device to solve the problems in the above background art.

[0006] In order to solve the above technical problems, the present application adopts the following technical solutions: The tea packaging machine anti-suckback device specifically comprises a workbench, one side of the top of the workbench is fixedly provided with a mounting plate, one side of the top of the mounting plate is rotationally connected with a unwinding roller, the side of the mounting plate away from the unwinding roller is provided with a driving mechanism, which is used for driving the unwinding roller to rotate, the side of the mounting plate close to the unwinding roller and below the first guide roller is rotationally connected with a first guide roller and a plurality of second guide rollers, the side of the mounting plate close to the unwinding roller and below the first guide roller is provided with a tensioning movable rod, and the end of the tensioning movable rod is fixedly provided with a second connecting disc, and the tensioning movable rod is rotationally connected to the mounting plate through the second connecting disc.

[0007] Preferably, one end of the unwinding roller close to the mounting plate is fixedly provided with an unwinding gear, the side of the mounting plate close to the unwinding gear and below the left of the unwinding gear is rotationally connected with a first driving gear, the mounting plate and the side of the second connecting disc are rotationally connected with a first connecting disc, the top of the first connecting disc is fixedly provided with an adjusting rod, the end of the adjusting rod away from the first connecting disc is rotationally connected with a transmission adjusting gear inside, and the transmission adjusting gear is located between the unwinding gear and the first driving gear and is used for meshing connection with the unwinding gear and the first driving gear. The driving mechanism comprises a driving motor installed on the side of the mounting plate away from the first driving gear, the output end of the driving motor is fixedly provided with a first pulley, one end of the first driving gear protrudes from the mounting plate and is fixedly provided with a second pulley, and the outer sides of the first pulley and the second pulley are connected with a transmission belt.

[0008] Preferably, the second connecting disc is provided with a movable groove inside the side close to the first connecting disc, the first connecting disc is fixedly provided with a driving block matched with the movable groove on both sides of the side close to the second connecting disc, and the driving block is slidingly connected to the inside of the movable groove.

[0009] Preferably, the inside of the top end of the adjusting rod is provided with a second guide groove, the mounting plate is provided with a first guide groove between the unwinding gear and the first driving gear, and the transmission adjusting gear is slidingly and rotationally connected to the inside of the second guide groove and the first guide groove.

[0010] Preferably, the rotation connection between the first connecting disc and the mounting plate is a damping rotation shaft connection.

[0011] Preferably, a second driving gear is rotatably connected to the mounting plate and located below the unwinding gear on the right side, a first transmission gear and a second transmission gear are rotatably connected to the mounting plate and located at the bottom of the side of the first driving gear and the second driving gear, the first driving gear is meshingly connected with the second transmission gear, the second transmission gear is meshingly connected with the first transmission gear, and the first transmission gear is meshingly connected with the second driving gear.

[0012] Compared with the prior art, the present application has the following beneficial effects: The present application effectively reduces the probability of back suction in the tea packaging process, and can automatically adjust and solve the back suction problem in the case of back suction, without the need for equipment downtime maintenance operation, greatly improving the practicality and convenience when used, thereby improving the production efficiency and reducing the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the scheme in the present application, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0014] Figure 1 is a schematic view of the structure of the present application from the shaft; Figure 2 is a schematic view of the structure of the present application from the right side Figure 1 ; Figure 3 is a schematic view of the structure of the unwinding gear, the transmission adjusting gear and the first driving gear of the present application; Figure 4 is a schematic view of the structure of the driving mechanism of the present application; Figure 5 is a schematic view of the structure of the first connecting disc and the second connecting disc of the present application; Figure 6 is a schematic view of the structure of the movable groove of the present application; Figure 7 is a schematic view of the structure of the driving block of the present application; Figure 8 is a schematic view of the structure of the second driving gear, the first transmission gear and the second transmission gear of the present application; Figure 9 is a schematic view of the structure of the transmission adjusting gear in position A and position B of the present application; Figure 10The first pulley is a structural schematic view of the transmission adjusting gear of the application in position C; Figure 11 The second pulley is a structural schematic view of the tensioning movable rod and the adjusting rod of the application; Figure 12 The transmission belt is a right view structural schematic of the application Figure 2 .

[0015] The mark in the figure is explained as follows: 1, workbench; 2, mounting plate; 3, unwinding roller; 4, first guide roller; 5, tensioning movable rod; 6, second guide roller; 7, packaging film; 8, unwinding gear; 9, driving motor; 10, first pulley; 11, second pulley; 12, transmission belt; 13, first driving gear; 14, transmission adjusting gear; 15, adjusting rod; 16, first connecting disc; 17, second connecting disc; 18, first guide groove; 19, second guide groove; 21, second driving gear; 22, first transmission gear; 23, second transmission gear; 24, movable groove; 25, driving block; 26, conveying mechanism. DETAILED DESCRIPTION

[0016] In order for the person skilled in the art to better understand the application scheme, the technical solutions in the embodiments of the application will be clearly and completely described below in combination with the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the application.

[0017] Embodiment one Please refer to Figures 1-12The tea packaging machine anti-suck-back device provided by the application comprises a workbench 1, a mounting plate 2 is fixed on one side of the top of the workbench 1, a pay-off roller 3 is rotatably connected to the top of one side of the mounting plate 2, a driving mechanism is installed on the side of the mounting plate 2 away from the pay-off roller 3 and is used for driving the pay-off roller 3 to rotate, a first guide roller 4 and a plurality of second guide rollers 6 are rotatably connected to the side of the mounting plate 2 close to the pay-off roller 3 and below the pay-off roller 3, a tensioning movable rod 5 is arranged on the side of the mounting plate 2 close to the pay-off roller 3 and below the first guide roller 4, a second connecting disc 17 is fixed to the end of the tensioning movable rod 5, and the tensioning movable rod 5 is rotatably connected to the mounting plate 2 through the second connecting disc 17. In use, the packaging film 7 is paid off from the outside of the pay-off roller 3 and then is guided in sequence outside the first guide roller 4, the tensioning movable rod 5 and the second guide rollers 6. The conveying mechanism 26 is used for conveying the packaging film during packaging. The conveying principle is the prior art, that is, a power mechanism drives two conveying wheels meshing with each other to reversely rotate towards each other, the two side edges of the packaging film 7 approach each other during the packaging process and pass through the two conveying wheels, and when the power mechanism drives the two conveying wheels to reversely rotate towards each other, the packaging film 7 is driven to move downwards. It should be noted that the conveying mechanism 26 intermittently drives the packaging film 7 to move downwards during the packaging process, that is, after each tea leaf bag is filled, the conveying mechanism 26 drives the packaging film 7 to move downwards by a distance so as to facilitate heat sealing treatment of the top of the filled tea leaf bag and cutting after the heat sealing treatment. The pay-off of the pay-off roller 3 to the packaging film 7 is also intermittent, that is, after each tea leaf bag is filled, the driving mechanism drives the pay-off roller 3 to rotate to pay off the packaging film 7 during the next filling process. In the embodiment, the active setting of the tensioning movable rod 5 is such that when the packaging film 7 is wound on the tensioning movable rod 5, the packaging film 7 is always in a tensioning state due to the self-weight of the tensioning movable rod 5, which can effectively prevent the packaging film 7 from being loose or wrinkled to a certain extent. Meanwhile, the tensioning movable rod 5 is rotationally connected with the mounting plate 2, so that the portions of the packaging film 7 wound on both sides of the tensioning movable rod 5 are reserved with a movable distance during conveying when the packaging film 7 is packaged. When the conveying mechanism 26 drives the packaging film 7 to move downward and the unwinding roller 3 does not move, the tensioning movable rod 5 is subjected to the tension of the packaging film 7 and moves upward by a distance. When the conveying mechanism 26 stops conveying the packaging film 7 during the tea bagging process, the unwinding roller 3 unwinds the packaging film 7, and at this time, the unwinding portion of the unwinding roller 3 compensates for the portion of the packaging film 7 moved downward by the conveying mechanism 26 during the previous tea bagging process. Therefore, since the packaging film 7 is wound on the outside of the tensioning movable rod 5, the tensioning movable rod 5 gradually moves downward to return to the vicinity of the original position under its own gravity. In this process, the tensioning movable rod 5 always drives the packaging film 7 to be in a tensioning state, which greatly reduces the probability of the packaging film 7 being loose or wrinkled, thereby effectively preventing the packaging film 7 from being sucked back, and the structure for preventing the packaging film 7 from being sucked back is simple and can be realized by only the tensioning movable rod 5, which reduces the production cost to a certain extent.

[0018] In some embodiments, a counterweight can be added to the tensioning movable rod 5 according to actual use requirements to increase the self-weight of the tensioning movable rod 5 and improve the use effect.

[0019] Embodiment Two In the above-mentioned embodiment, the tensioning movable rod 5 can keep the packaging film 7 in a tensioning state to reduce the probability of being sucked back, but when the packaging film 7 is actually sucked back, the self-weight of the tensioning movable rod 5 may not be able to solve the problem of being sucked back. Therefore, the embodiment is further optimized on the basis of the first embodiment to provide an optimized structure capable of solving the problem of being sucked back when the problem occurs.

[0020] Please refer to Figures 1-7The unwinding roller 3 is fixed with an unwinding gear 8 outside one end of the mounting plate 2, and when the unwinding gear 8 rotates, the unwinding roller 3 rotates with the unwinding gear 8. When in use, the packaging film 7 can be unwound by rotating the unwinding gear 8 counterclockwise. A first drive gear 13 is rotatably connected to the side of the mounting plate 2 close to the unwinding gear 8 and below the left side of the unwinding gear 8. A first connecting disc 16 is rotatably connected to the side of the mounting plate 2 and below the second connecting disc 17. An adjusting rod 15 is fixed to the top of the first connecting disc 16. A transmission adjusting gear 14 is rotatably connected to the end of the adjusting rod 15 away from the first connecting disc 16. The transmission adjusting gear 14 is located between the unwinding gear 8 and the first drive gear 13 and is used to mesh with the unwinding gear 8 and the first drive gear 13. The drive mechanism includes a drive motor 9 mounted on the side of the mounting plate 2 away from the first drive gear 13. The output end of the drive motor 9 is fixed with a first pulley 10. One end of the first drive gear 13 extends out of the mounting plate 2 and is fixed with a second pulley 11. The outer sides of the first pulley 10 and the second pulley 11 are connected with a transmission belt 12. When the drive motor 9 is started, it will drive the first pulley 10 to move, and then drive the second pulley 11 to rotate through the transmission of the transmission belt 12, thereby driving the first drive gear 13 to rotate. When in use, the adjusting rod 15 is inclined at its top end towards the direction close to the first drive gear 13 and the unwinding gear 8. In the natural state, the adjusting rod 15 is close to the first drive gear 13 and the unwinding gear 8 and in contact with them under the action of its own gravity and the weight of the tensioning movable rod 5 and the transmission adjusting gear 14. At this time, the transmission adjusting gear 14 is at position A. It should be noted that in actual use, in order to drive the unwinding roller 3 to unwind, the drive motor 9 needs to rotate the first drive gear 13 counterclockwise. When the first drive gear 13 rotates counterclockwise, the transmission adjusting gear 14 will mesh with the first drive gear 13 and the unwinding gear 8. The contact teeth of the first drive gear 13 and the transmission adjusting gear 14 exert a force on the transmission adjusting gear 14 towards the first drive gear 13 and the unwinding gear 8. At the same time, since the transmission adjusting gear 14 needs to drive the unwinding gear 8 to rotate counterclockwise, it will exert a reverse force on the transmission adjusting gear 14 during the movement of the unwinding gear 8. This reverse force is also towards the first drive gear 13 and the unwinding gear 8. Therefore, when the first drive gear 13 rotates, the transmission adjusting gear 14 will not easily come off.

[0021] Please refer to Figures 6-7The second connecting disc 17 is internally provided with a movable groove 24 on both sides near the side of the first connecting disc 16, and the first connecting disc 16 is fixedly provided with a driving block 25 adapted to the movable groove 24 on both sides near the side of the second connecting disc 17, the driving block 25 is slidingly connected inside the movable groove 24, the second guide groove 19 is formed in the top end inside of the adjusting rod 15, the first guide groove 18 is formed in the mounting plate 2 and between the unwinding gear 8 and the first driving gear 13, the transmission adjusting gear 14 is slidingly and rotatably connected inside the second guide groove 19 and the first guide groove 18, the free sliding of the driving block 25 inside the movable groove 24 enables the tensioning movable rod 5 and the second connecting disc 17 to freely rotate when the driving block 25 and the second connecting disc 17 do not abut, at this time, the working principle of the tensioning movable rod 5 is the same as that of the first embodiment.

[0022] When the packaging film 7 is sucked back, the packaging film 7 is re-wound on the unwinding roller 3 after being unwound by the unwinding roller 3. Therefore, after the conveying mechanism 26 drives the packaging film 7 to move downward, the tensioning movable rod 5 moves upward by a distance. In the next packaging process, the packaging film 7 is re-wound on the unwinding roller 3 due to the sucking back. At this time, the packaging film 7 cannot be unwound to compensate for the part of the conveying mechanism 26 moving downward. Therefore, the tensioning movable rod 5 cannot return to the original position, but moves upward by a distance again under the action of the packaging film 7. When the tensioning movable rod 5 moves, the movable groove 24 slides outside the driving block 25. When the tensioning movable rod 5 moves to the side end surface of the movable groove 24 abutting against the end surface of the driving block 25, the tensioning movable rod 5 cannot move upward alone at this time. When the conveying mechanism 26 drives the tensioning movable rod 5 to rise next time, the abutment of the movable groove 24 and the driving block 25 drives the first connecting disc 16 and the adjusting rod 15 to rotate together. At this time, the conveying mechanism 26 drives the packaging film 7 to move downward, and the unwinding roller 3 is stationary. Therefore, the first driving gear 13 and the unwinding gear 8 do not exert force on the transmission adjusting gear 14 at this time. When the tensioning movable rod 5 exerts force on the adjusting rod 15 through the cooperation of the movable groove 24 and the driving block 25, it drives the adjusting rod 15 to rotate clockwise. At this time, the adjusting rod 15 drives the transmission adjusting gear 14 to gradually disengage from the first driving gear 13 and the unwinding gear 8. When the transmission adjusting gear 14 is disengaged from the first driving gear 13, the rotation of the first driving gear 13 cannot drive the unwinding gear 8 to rotate. At this time, the unwinding gear 8 and the unwinding roller 3 are in an idle state. Therefore, under the action of the gravity of the tensioning movable rod 5, or in the case that the conveying mechanism 26 drives the packaging film 7 to move downward next time, the packaging film 7 in the sucking back part is pulled and drives the unwinding roller 3 to reverse, so as to pull out the packaging film 7 in the sucking back part and make it return to the normal winding state outside the unwinding roller 3. In the process that the packaging film 7 returns to the normal winding state from the sucking back state, the tensioning movable rod 5 gradually returns to the original position under the action of its own gravity. The transmission adjusting gear 14 gradually returns to the original position under the action of its own gravity and the gravity of the adjusting rod 15 and contacts the unwinding gear 8 and the first driving gear 13. At this time, when the first driving gear 13 is driven to rotate by the driving motor 9 next time, the transmission adjusting gear 14, the first driving gear 13 and the unwinding gear 8 are in the meshing state and drive the unwinding gear 8 to rotate counterclockwise normally. At this time, the equipment is in the normal running state.

[0023] It should be noted that the first guide groove 18 and the second guide groove 19 are arranged to guide the movement track of the transmission adjusting gear 14, so that the transmission adjusting gear 14 can simultaneously disengage from the unwinding gear 8 and the first driving gear 13 and does not interfere with the unwinding gear 8. The first guide groove 18 is arranged to support the transmission adjusting gear 14, so that the movement of the transmission adjusting gear 14 is more stable.

[0024] In the embodiment, by the arrangement of the first driving gear 13, the transmission adjusting gear 14, the adjusting rod 15 and the first connecting disc 16, and the cooperation of the movable slot 24 and the driving block 25, the reverse suction of the packaging film 7 can be automatically and timely stopped, and the normal working state can be automatically restored after the reverse suction is eliminated, without manual intervention and under the condition that the equipment does not stop, the adjustment work after the reverse suction is completed can be completed, the manual labor intensity is greatly reduced, the practicability and the convenience during use are improved, and the production efficiency is improved to a certain extent.

[0025] Embodiment three Please refer to Figures 1-12 In the above embodiment two, since the first connecting disc 16 and the second connecting disc 17 are both freely rotatably connected to the mounting plate 2, when the tensioning movable rod 5 gradually returns to the original position under the action of its own gravity, and the transmission adjusting gear 14 gradually returns to the original position under the action of its own gravity and the gravity of the adjusting rod 15 and contacts the unwinding gear 8 and the first driving gear 13, the transmission adjusting gear 14 may have returned to the position A before the tensioning movable rod 5 returns to the original position, at this time, the part of the reverse suction packaging film 7 has not completely returned to the normal unwinding state, that is, a small part of the packaging film 7 is still in the reverse suction state, but the unwinding gear 8 and the unwinding roller 3 cannot be in the idle state, and the tensioning movable rod 5 is in the position above the original position, when the working process in the embodiment two is repeated, the position of the tensioning movable rod 5 is taken as the initial position, therefore, the reverse suction problem cannot be completely solved.

[0026] Therefore, when the reverse suction occurs, the tensioning movable rod 5 gradually rises, when the movable groove 24 and the end surface of the driving block 25 abut, the adjusting rod 15 and the transmission adjusting gear 14 follow the tensioning movable rod 5 to rotate, at this time, the transmission adjusting gear 14 gradually moves from position A to position C, when the transmission adjusting gear 14 leaves position A and the unwinding gear 8 and the unwinding roller 3 are in an idling state, under the action of the weight of the tensioning movable rod 5, the tensioning movable rod 5 will first move downward to pull out the part of the packaging film 7 sucked back, the process of the tensioning movable rod 5 returning to the original position in example one is divided into two sections, the first section is that the end surface of the movable groove 24 moves away from one of the end surfaces of the driving block 25 to the other end surface of the driving block 25, before the end surface of the movable groove 24 contacts the other end surface of the driving block 25, the tensioning movable rod 5 is in an idling state, during this process, due to the action of the damping shaft, the position of the transmission adjusting gear 14 remains unchanged, the adjusting rod 15 will first pull a part of the reverse suction packaging film 7 to move; the second section is that when the tensioning movable rod 5 moves to the end surface of the movable groove 24 contacting the other end surface of the driving block 25, under the action of the weight of the tensioning movable rod 5, the tensioning movable rod 5 drives the adjusting rod 15 and the transmission adjusting gear 14 to rotate together and gradually returns to position A, during this process, the tensioning movable rod 5 can completely pull out the part of the packaging film 7 sucked back and make it in a normal unwinding state, at the same time, when the transmission adjusting gear 14 returns to position A, the first driving gear 13 can drive the unwinding gear 8 to rotate counterclockwise through the transmission adjusting gear 14 to perform normal unwinding work.

[0027] It should be noted that the connection of the damping shaft is a prior art and will not be described in detail here.

[0028] Example Four In the above embodiment three, when the transmission adjusting gear 14 is away from position A, the gravity of the tensioning movable rod 5 is used to pull the sucked part of the packaging film 7 by the reverse rotation of the unwinding roller 3 and the unwinding gear 8, but in actual use, the unwinding roller 3 may first suck the packaging film 7 and move the tensioning movable rod 5 upward without contacting the end surface of the driving block 25, at this time, when the conveying mechanism 26 drives the packaging film 7 to move downward, the sucked part of the packaging film 7 may not have enough time to recover when the conveying mechanism 26 has driven the packaging film 7 to move downward for a long distance, at this time, the adjusting rod 15 may swing to a large angle and tilt away from the first driving gear 13, at this time, due to the gravity of the adjusting rod 15 and the transmission adjusting gear 14 and the setting of the damping shaft, the gravity effect of the tensioning movable rod 5 may not be obvious, therefore, the embodiment is further optimized based on the embodiment three.

[0029] Please refer to Figures 8-12 , the second driving gear 21 is rotatably connected to the mounting plate 2 below the right side of the unwinding gear 8, the first transmission gear 22 and the second transmission gear 23 are rotatably connected to the bottom of the side close to the first driving gear 13 and the second driving gear 21 on the mounting plate 2, the first driving gear 13 is meshingly connected with the second transmission gear 23, the second transmission gear 23 is meshingly connected with the first transmission gear 22, and the first transmission gear 22 is meshingly connected with the second driving gear 21, when the first driving gear 13 rotates, it will in turn drive the second transmission gear 23, the first transmission gear 22 and the second driving gear 21 to rotate, and the rotation direction of the second driving gear 21 is opposite to that of the first driving gear 13, when the transmission adjusting gear 14 is located in the first guide slot 18 close to the inner side of one end of the second driving gear 21, the transmission adjusting gear 14 is meshingly connected between the unwinding gear 8 and the second driving gear 21, at this time, the transmission adjusting gear 14 is at position B, and the adjusting rod 15 still tilts toward the first driving gear 13, at the same time, since the rotation direction of the second driving gear 21 is opposite to that of the first driving gear 13, at this time, the first driving gear 13 can drive the unwinding gear 8 to reverse through the second transmission gear 23, the first transmission gear 22 and the second driving gear 21, when the conveying mechanism 26 drives the packaging film 7 to move downward, it can only move the transmission adjusting gear 14 to position B at most, at this position, the reverse rotation of the unwinding gear 8 and the unwinding roller 3 driven by the driving motor 9 will speed up the reverse unwinding of the sucked part from the outside of the unwinding roller 3 to compensate for the part of the packaging film 7 moved downward by the conveying mechanism 26 until the conveying mechanism 26 stops moving, at this time, under the action of the gravity of the tensioning movable rod 5, the adjusting rod 15 drives the transmission adjusting gear 14 to move away from position B to position A, and slowly winds back the remaining part of the packaging film 7 sucked outside the unwinding gear 8 and the unwinding roller 3, when the tensioning movable rod 5 returns to the initial position, the equipment returns to the normal operating state.

[0030] In this application, unless otherwise clearly indicated and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection or communication with each other; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] Obviously, the above-described embodiments are only a part of the embodiments of the present application, and are not all the embodiments. The preferred embodiments of the present application are shown in the drawings, but do not limit the patent scope of the present application. The present application can be realized in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some of the technical features. Any equivalent structure made by using the content of the present application specification and drawings, directly or indirectly applied to other related technical fields, is also within the scope of the patent protection of the present application.

Claims

1. A tea packaging machine anti-suction device, comprising a workbench (1), one side of the top of the workbench (1) is fixedly connected with a mounting plate (2), one side of the top of the mounting plate (2) is rotatably connected with a unwinding roller (3), and the side of the mounting plate (2) away from the unwinding roller (3) is provided with a driving mechanism for driving the unwinding roller (3) to rotate, and the side of the mounting plate (2) close to the unwinding roller (3) and below the unwinding roller (3) is rotatably connected with a first guide roller (4) and a plurality of second guide rollers (6), characterized in that, The mounting plate (2) is provided with a tensioning movable rod (5) near one side of the unwinding roller (3) and below the first guide roller (4), the end of the tensioning movable rod (5) is fixedly provided with a second connecting disc (17), and the tensioning movable rod (5) is rotationally connected to the mounting plate (2) through the second connecting disc (17).

2. The tea packaging machine anti-suckback device according to claim 1, characterized in that, The unwinding roller (3) is fixedly provided with an unwinding gear (8) outside one end of the mounting plate (2) near the unwinding gear (8), the mounting plate (2) is rotationally connected with a first driving gear (13) below the left side of the unwinding gear (8) near one side of the unwinding gear (8), the mounting plate (2) is rotationally connected with a first connecting disc (16) on one side of the second connecting disc (17), the top of the first connecting disc (16) is fixedly provided with an adjusting rod (15), the end of the adjusting rod (15) away from the first connecting disc (16) is rotationally connected with a transmission adjusting gear (14) on the inner side, and the transmission adjusting gear (14) is located between the unwinding gear (8) and the first driving gear (13) and is used for being meshed with the unwinding gear (8) and the first driving gear (13); The driving mechanism comprises a driving motor (9) mounted on the side of the mounting plate (2) away from the first driving gear (13), the output end of the driving motor (9) is fixedly provided with a first pulley (10), one end of the first driving gear (13) protrudes from the mounting plate (2) and is fixedly provided with a second pulley (11), and the outer sides of the first pulley (10) and the second pulley (11) are connected with a transmission belt (12).

3. The tea packaging machine anti-suckback device according to claim 2, characterized in that, The second connecting disc (17) is provided with movable grooves (24) on the inner sides of two sides near the first connecting disc (16), and the first connecting disc (16) is fixedly provided with driving blocks (25) matched with the movable grooves (24) on the two sides near the second connecting disc (17), and the driving blocks (25) are slidingly connected to the inner sides of the movable grooves (24).

4. The tea packaging machine anti-suckback device according to claim 3, characterized in that, The inner side of the top end of the adjusting rod (15) is provided with a second guide groove (19), the mounting plate (2) is provided with a first guide groove (18) between the unwinding gear (8) and the first driving gear (13), and the transmission adjusting gear (14) is slidingly and rotationally connected to the inner sides of the second guide groove (19) and the first guide groove (18).

5. The tea packaging machine anti-suckback device according to claim 3, characterized in that, The rotation connection between the first connecting disc (16) and the mounting plate (2) is a damping rotation shaft connection.

6. The tea packaging machine anti-suckback device according to claim 5, characterized in that, The mounting plate (2) is rotatably connected with a second driving gear (21) below the unwinding gear (8), the mounting plate (2) is rotatably connected with a first transmission gear (22) and a second transmission gear (23) on the bottom of the side close to the first driving gear (13) and the second driving gear (21), the first driving gear (13) is meshedly connected with the second transmission gear (23), the second transmission gear (23) is meshedly connected with the first transmission gear (22), the first transmission gear (22) is meshedly connected with the second driving gear (21), when the transmission adjusting gear (14) is located in the first guide groove (18) close to the second driving gear (21), the transmission adjusting gear (14) is meshedly connected between the unwinding gear (8) and the second driving gear (21).

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