A film roll changing mechanism and a roll changing system

Abstract

The present application relates to the technical field of plastic film production, and specifically discloses a film roll roll changing mechanism and a roll changing system. The film roll roll changing mechanism comprises a clamping jaw and a storage assembly. The storage assembly comprises a drive unit and two storage portions symmetrically arranged with respect to the film conveying direction. Each storage portion comprises a support inner disc capable of rotating and a fixedly installed outer guard. The outer guard surrounds the periphery of the support inner disc. The periphery of the support inner disc is provided with a plurality of accommodating grooves with openings facing the outer guard. The accommodating grooves are parallel to the driven winding roller. The outer guard is provided with an inlet and an outlet. The inlet is located above the outlet. The inlet and the outlet are capable of being directly opposite to the openings of the accommodating grooves. The film roll roll changing system comprises the film roll roll changing mechanism, a tension plate and a tension cylinder. The tension cylinder is used to make the winding roller on the tension plate always close to the driven winding roller. The present application is used to solve the problem of low work efficiency caused by frequent replacement of the winding roller in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic film production, in particular to a film roll changing mechanism and a roll changing system. BACKGROUND

[0002] There are various methods for producing plastic films, such as extrusion blow molding, calendering, flow casting, etc. Each method has its own characteristics and different adaptability. Regardless of the method, the edge material needs to be cut after the film is formed, and then the film is wound. When winding the film, the winding drum of the wound film is sleeved on the inflatable shaft to form a winding shaft (also known as a film roll). After winding is completed, the air pressure in the inflatable shaft is released, so that the outer diameter of the inflatable shaft becomes smaller and is taken out from the winding drum, facilitating the winding of the film after the new winding drum is sleeved.

[0003] With the development of technology, the degree of automation of factories is increasing. After the winding of the film on the previous winding roll is completed, the film can be automatically cut by a cutting knife, and the spare winding roll can be changed by using the existing roll changing structure on the winding equipment. Specifically, the roll changing structure is installed on the driving winding cover roll of the equipment. The roll changing structure includes a rotating plate, an incomplete guide disc, and a claw. The rotating plate is coaxially connected to the driving winding cover roll. The incomplete guide disc is fixedly installed. The claw includes a fixed claw and a movable claw. The fixed claw is fixedly installed on the rotating plate. The movable claw is rotatably connected to the rotating plate. The movable claw has a bearing. After the bearing contacts the outer peripheral guide surface of the incomplete guide disc, the movable claw and the fixed claw form a complete claw with a clamping groove. Then, the complete claw moves the spare winding roll on the input side of the driving winding cover roll into the clamping groove of the claw. With the rotation of the rotating plate, the spare winding roll originally located on the input side of the winding cover roll is moved around the surface of the driving winding cover roll and transferred to the output side of the driving winding cover roll. The film is wound on the spare winding roll by using static electricity or by using the effect of the double-sided tape previously attached to the spare winding roll.

[0004] Although the automatic roll changing of the process ensures that the roll changing process does not need to stop, the winding roll is long and heavy (generally 2-4 meters long, and because the air inflation shaft of the winding roll is mainly made of alloy steel material, it is relatively heavy), and it is difficult to place a standby winding roll on the standby area. Generally speaking, for a heavy and long winding roll, two workers are needed to lift and place the winding roll, but as factory automation improves, the number of personnel in each link is reduced, and the placement of the winding roll is often completed by a single worker. When a single worker places the winding roll from one side, the worker needs to lift the heavy and long winding roll, which causes the winding roll to fall onto the standby area when it is placed on the standby area. Because the cantilever end of the winding roll lacks support, it often falls onto the standby area. On the one hand, it is very difficult for a single worker to place the winding roll in a single cantilever manner, and there is a certain risk of falling; on the other hand, the winding roll and the standby area are damaged due to the impact of the falling manner; in addition, it is difficult to ensure that the winding roll is placed in the center in the falling manner, which causes the winding roll to be placed off-center.

[0005] In addition, the existing device can only place one standby winding roll at a specific position of the standby area, and a new winding roll is placed after the use of a winding roll. The winding roll changes at different frequencies according to the winding diameter. The winding roll changes at a frequency of about half an hour for high-frequency changes, and the winding roll changes at a frequency of 2-3 hours for low-frequency changes. For the case of a higher winding roll change frequency, workers need to change the winding roll more frequently, and the workers responsible for changing the winding roll are not primarily responsible for changing the winding roll. This causes workers to often leave their primary workstations to change the standby winding roll, which greatly reduces the work efficiency of the primary work of the workers. If the workers forget to change the standby winding roll, the winding device cannot achieve winding. SUMMARY

[0006] The present application aims to provide a film roll changing mechanism to solve the problem of low work efficiency caused by frequent winding roll changes in the prior art.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0008] A film roll changing mechanism includes a claw capable of transferring a standby winding roll from the input side to the output side of the driving winding roll, and a storage assembly provided on the input side of the driving winding roll. The storage assembly includes a drive unit and two storage parts symmetrically arranged about the film conveying direction. Each storage part includes a self-rotating support inner disc and a fixedly installed outer guard. The outer guard surrounds the support inner disc. The support inner disc is provided with a plurality of accommodation grooves with openings facing the outer guard. The accommodation grooves are parallel to the driving winding roll. The outer guard is provided with an inlet and an outlet. The inlet is located above the outlet. The inlet and the outlet are capable of being aligned with the openings of the accommodation grooves.

[0009] The principle and advantages of the present scheme are:

[0010] When the present scheme is adopted, the spare winding roller is transferred from the input side to the output side of the driving winding roller through the clamping jaw of the prior art, facilitating automatic roll changing operation of the film roll; and the plurality of openings provided on the support inner disc of the left and right storage components of the storage assembly face the accommodating grooves of the outer protective piece, so that one spare winding roller can be placed in each accommodating groove. Workers can place multiple spare winding rollers on the support inner disc at one time, and when the spare winding roller is used, only the start of the driving unit needs to be controlled to rotate the support inner disc driven by the driving unit, and then the spare winding roller near the discharge port on the support inner disc is discharged. Since the accommodating groove is parallel to the driving winding roller, the discharged spare winding roller can be transferred by the clamping jaw, which not only realizes the roll changing operation of a single spare winding roller, but also ensures that workers can place multiple spare winding rollers on the support inner disc through the feeding port, and then the driving unit automatically controls the discharge of the spare winding roller according to the production situation. In the whole process, workers do not need to place a spare winding roller every time a spare winding roller is used, reducing the frequency of workers placing spare winding rollers, making the workers' time on the main post more concentrated, and helping to improve the efficiency of work.

[0011] Due to the presence of the driving unit, the spare winding roller can be automatically discharged by controlling the rotation of the support inner disc by the driving unit, improving the automation level of the factory, and helping to reduce the probability that the winding equipment cannot be wound due to workers forgetting to place the spare winding roller, i.e. reducing the downtime caused by human factors.

[0012] In addition, in the prior art, due to the special structure of the air inflation shaft on the winding roller and the relatively high price, it is generally required to be kept flat in the non-use state, so the factory generally has a separate place to place the air inflation shaft. The present scheme provides a support inner disc with multiple accommodating grooves, so that the spare winding roller has a storage rack near the standby position, which facilitates the storage of the spare winding roller.

[0013] Preferably, as an improvement, the storage part further comprises a fixedly installed guide plate, the guide plates on the two storage parts are located outside the two support inner discs, the guide plates are provided with inclined guide surfaces, and the two guide surfaces form a V shape.

[0014] Beneficial effects: The guide plate with an inclined guide surface is arranged outside the two support inner discs, so that workers only need to place the spare winding roller on the accommodating groove, and the uncentered spare winding roller will automatically be centered during the rotation of the support inner disc and contact with the guide surface. No manual adjustment is needed to adjust the centering, and the problem of winding off-center caused by uncentered spare winding rollers is also avoided.

[0015] Preferably, as an improvement, the outer protection piece is fixedly installed on the rack, the outer protection plate comprises a left protection plate and a right protection plate, the faces of the left protection plate and the right protection plate towards the support inner disc are arc faces, the left protection plate and the right protection plate are fixedly connected with the guide plates to form an integral whole, and a transmission rod is fixedly connected between the two support inner discs and is rotatably connected to the guide plates of the two storage parts.

[0016] Beneficial effects: In actual application, the storage assembly not only needs to stably store multiple standby winding rollers, but also needs to facilitate the falling of the standby winding rollers and the path of the clamping jaw during the transfer process, and also needs to ensure that the standby winding rollers are automatically adjusted and centered during the rotation process of the support inner disc. However, the space available for installing the storage assembly on the winding equipment is limited, which causes certain problems in the implementation of the storage assembly. The outer protection piece is directly fixedly installed with the rack, so that the weight of the standby winding roller is borne by the outer protection piece. At the same time, the fixed connection of the outer protection piece with the guide plate improves the overall strength of the storage part, which is conducive to improving the support stability of the stored objects. At the same time, the outer protection piece is located between the two guide plates, so it can be directly supported by the rack of the winding equipment, ensuring that the installation can still be completed in the limited space, and the support point can be set at the middle part of the outer protection piece during actual use, thereby further improving the stability of the support.

[0017] In addition, the two support inner discs of the two storage parts are synchronously rotated through a transmission rod, ensuring the rotation synchronization of the two symmetrical storage parts.

[0018] Preferably, as an improvement, the storage assembly further comprises a support rod fixedly installed between the outer protection plates of the two storage parts, and the support rod is close to the feeding port.

[0019] Beneficial effects: Because the support rod spans between the two storage parts, when a standby winding roller with a long length and a large weight is placed, a single worker only needs to place the standby winding roller on the support rod and then push the standby winding roller to the opposite storage part. When it is observed that the other end of the standby winding roller is close to the feeding port, the worker uses both hands to hold the standby winding roller and places the standby winding roller into the corresponding accommodation groove from the feeding port. The entire placement process shares the weight of the standby winding roller with the support rod, greatly reducing the labor intensity. Moreover, the standby winding roller is placed into the accommodation groove by the worker only when the standby winding roller is close to the accommodation groove, so the worker holds the standby winding roller for a short time, which reduces the probability of the standby winding roller being damaged due to impact.

[0020] In addition, the existence of the support rod integrates the left and right two separate outer protection pieces, improving the structural stability between the two storage parts.

[0021] Preferably, as an improvement, the bottom of the accommodating groove is provided with a ball, and the part of the accommodating groove without the ball is provided with an elastic block.

[0022] Beneficial effects: the ball is arranged, so that the friction force suffered by the standby winding roller when automatically centered is small, and the automatic centering is more convenient; in actual use, the free height of the elastic block can be set to be higher than the top surface of the ball, so that when the standby winding roller is placed, the problem of damage caused by the direct collision between the standby winding roller and the bottom of the accommodating groove does not occur.

[0023] Preferably, as an improvement, the storage part further comprises a buffer rod arranged below the supporting inner disc, the buffer rod is rotationally connected to the rack, an elastic member is arranged between the buffer rod and the rack, and the free end of the buffer rod is upwardly tilted in a free state and located below the discharge port.

[0024] Beneficial effects: the arrangement of the buffer rod and the elastic member enables the standby winding roller to be guided to fall more slowly by the buffer rod during the process of falling from the discharge port to the standby position that can be acted on by the clamping jaw, so that the standby winding roller does not suddenly fall and drop in the standby position under the action of gravity, thereby avoiding the problem of collision damage, and the service life of the standby winding roller is improved.

[0025] Preferably, as an improvement, the press spray pot is further arranged below the storage part, the pressing member of the press spray pot is located below the buffer rod, the pressing member of the press spray pot can be pressed by the buffer rod, the nozzle of the press spray pot faces the bearing on the standby winding roller, a baffle is arranged beside the discharge port, the baffle and the clamping jaw are located on both sides of the discharge port, and the rotation center of the buffer rod is located on the side where the baffle is arranged.

[0026] Beneficial effects: the arrangement of the press spray pot with the nozzle below the buffer rod enables the pressing member of the press spray pot to be pressed by the buffer rod when the buffer rod swings under the pressure of the gravity of the standby winding roller, and then forces the press spray pot to spray lubricating oil, so that the sprayed lubricating oil can be sprayed on the bearing of the standby winding roller, thereby achieving the lubrication of the bearing of the standby winding roller, and the staff does not need to lubricate the bearing of the standby winding roller regularly.

[0027] In addition, the arrangement of the baffle and the position of the rotation center of the buffer rod enables the standby winding roller to always fall along the baffle when the buffer rod guides the falling standby winding roller, so that the standby winding roller does not move towards the clamping jaw after the falling is completed, and the standby winding roller accurately falls in the standby position every time.

[0028] Preferably, as an improvement, the driving assembly comprises a transmission gear set and a driver, the transmission gear set comprises a driving gear, a driven gear, a driving shaft and a driven shaft, the driving gear is an incomplete gear, the driving gear is fixedly installed on the driving shaft together with the pawl, the driven gear is installed on the driven shaft, the driving gear and the driven gear can be engaged, the driven shaft is in transmission connection with the supporting inner disc, and the driver drives the driving shaft to rotate.

[0029] Beneficial effects: when the scheme is adopted, the driver of the driving assembly is used to drive the pawl to rotate and to drive the supporting inner disc to rotate through the engagement of the driving gear and the driven gear, so that the same power is used to drive two parts to realize two functions, which is beneficial to reduce the cost and improve the energy utilization rate.

[0030] In addition, in the scheme, through the engagement of the incomplete driving gear and the driven gear, the driven gear does not rotate a circle when the driving gear rotates a circle, and the driving gear can be designed to drive the driven gear to rotate only when the pawl starts to rotate, so that the standby winding roller reaches the standby position before the pawl, and the rotation angle of the supporting inner disc is equal to the included angle between adjacent accommodating grooves each time, so that after the driver is started, the supporting inner disc rotates, and the standby winding roller on the accommodating groove closest to the discharge port is discharged from the discharge port to the standby position, the standby winding roller placed in the standby position will reach the standby position before the pawl, so that the pawl can be used when it needs to use the standby winding roller, and when the accommodating groove where the standby winding roller is located is opposite to the discharge port, the incomplete teeth of the driving gear are disengaged from the driven gear, so that the driven gear does not rotate, and the driving gear rotates a circle to drive the pawl to rotate a circle and only drive the supporting inner disc to rotate the angle of the adjacent accommodating groove.

[0031] Preferably, as an improvement, the driven gear is in convex-concave matching with the driven shaft through the axial sliding groove and the axial protrusion, and the driven gear can move axially along the axial protrusion.

[0032] Beneficial effects: when the scheme is adopted, when the number of standby winding rollers on the supporting inner disc is small and manual storage of standby winding rollers on the supporting inner disc is needed, in order to ensure that the driven gear is not in contact with the driving gear, at this time, the worker can push the driven gear to move axially along the driven shaft when the driver is in the unstarted state, so that the driven gear is away from the driving gear, and the worker can rotate the supporting inner disc by himself to facilitate the full storage of standby winding rollers on the supporting inner disc.

[0033] The application also provides a film roll changing mechanism, which comprises the film roll changing mechanism and a tension plate rotatably connected to the rack, a U-shaped clamping groove is arranged at the free end of the tension plate, and a tension cylinder is arranged to drive the tension plate to rotate and make the winding roller in the U-shaped clamping groove always close to the driving winding roller. Attached Figure Description

[0034] Figure 1 This is a three-dimensional structural diagram of the roll changing system of the present invention on the winding equipment (the figure shows the spare winding roll and the winding roll being wound).

[0035] Figure 2 This is a three-dimensional structural diagram of the roller changing system according to an embodiment of the present invention after the take-up roller being wound is removed and the active take-up roller is dashed (no spare take-up roller is placed on the storage component in this figure).

[0036] Figure 3 for Figure 2 The right view.

[0037] Figure 4 for Figure 3 Enlarged schematic diagram of part A in the diagram.

[0038] Figure 5 for Figure 2 A 3D structural diagram from another perspective after removing the active take-up roller (to show the connection relationship between the driver, the rotating plate, and the chuck).

[0039] Figure 6 for Figure 5 Top view.

[0040] Figure 7 for Figure 6 A partial sectional view under BB.

[0041] Figure 8 for Figure 5 A schematic diagram of the three-dimensional structure from another perspective.

[0042] Figure 9 This is a schematic diagram of the storage section for storing components in this embodiment (the guide plate on the right side of the storage section is not shown in the diagram). Detailed Implementation

[0043] The following detailed description illustrates the specific implementation method:

[0044] The reference signs in the drawings of the specification include: rack 100, discharge plate 101, discharge cylinder 102, winding assembly 10, driving winding roller 11, tension plate 12, tension cylinder 13, film roll changing roller mechanism 200, storage assembly 20, driving machine group 21, driver 211, driving shaft 212, driven shaft 213, driving gear 214, driven gear 215, storage part 22, supporting inner disc 221, containing groove 2211, ball 2212, outer protection part 222, discharge port 2221, extension passage 2222, guide plate 223, guide surface 2231, baffle plate 224, transmission rod 225, supporting rod 226, buffer rod 23, watering can 24, nozzle 241, mounting seat 25, strip-shaped through hole 251, roller changing assembly 30, rotating plate 31, guide disc 32, clamping jaw 33, fixed clamping jaw 331, movable clamping jaw 332, rolling bearing 333, spare winding roller 300.

[0045] The embodiment is basically as shown in the accompanying drawings. Figures 1 to 9

[0046] A roller changing system, comprising a rack 100, a winding assembly 10 and a film roll changing roller mechanism 200, the film roll changing roller mechanism 200 comprising a storage assembly 20 and a roller changing assembly 30, the winding assembly 10 being used to provide winding power for a winding roller being wound, the storage assembly 20 being used to store a spare winding roller 300, and the roller changing assembly 30 being used to transfer the spare winding roller placed in a spare position to the winding assembly 10.

[0047] Specifically, the winding assembly 10 comprises a driving winding roller 11, a tension plate 12 and a tension cylinder 13, the driving winding roller 11 can be a driving winding leather roller, the driving winding roller 11 and the tension plate 12 are both rotationally connected to the rack 100, the driving winding roller 11 rotates all the time during the film winding process to provide power for the film winding, and the driving winding roller 11 is driven by a separate power mechanism (not shown in the drawings).

[0048] The rack 100 is rotationally connected with a discharge plate 101, the top of the discharge plate 101 is a free end and is provided with a blocking groove, and the rack 100 is provided with a discharge cylinder 102 (an oil cylinder or an air cylinder), the discharge cylinder 102 is used to control the rotation of the discharge plate 101 after the winding roller with the wound film is placed on the blocking groove of the discharge plate 101, so as to facilitate the discharge plate 101 to move the winding roller away from the driving winding roller 11 and facilitate the transfer equipment (such as a forklift) to transfer the winding roller with the film.

[0049] ​The storage assembly 20 of the film roll changing mechanism is located on the input side of the driving winding roller 11 and above the standby position, and comprises a driving unit 21 and two storage parts 22 symmetrically arranged with respect to the film conveying direction. Each storage part 22 comprises a self-rotating supporting inner disc 221, a fixedly installed outer guard 222 and a fixedly installed guide plate 223. The outer guard 222 surrounds the periphery of the supporting inner disc 221. A plurality of accommodating grooves 2211 are arranged on the periphery of the supporting inner disc 221 and face the outer guard 222. The accommodating grooves 2211 are parallel to the driving winding roller 11. The outer guard 222 is provided with an inlet and an outlet 2221. The inlet is located directly above the outlet 2221. The inlet and the outlet 2221 are both capable of being aligned with the openings of the accommodating grooves 2211. The guide plates 223 of the two storage parts 22 are located on the outer sides of the two supporting inner discs 221. Each guide plate 223 is integrally formed with an inclined guide surface 2231. The two guide surfaces 2231 form a V-shaped surface with the top being larger and the bottom being smaller.

[0050] The outer guard 222 is fixedly installed on the rack 100 through a baffle 224. The outer guard comprises a left guard and a right guard. The surfaces of the left guard and the right guard facing the supporting inner disc 221 are both arc surfaces. The left guard, the right guard and the guide plate 223 are fixedly connected as a whole through screws. A transmission rod 225 is fixedly connected between the two supporting inner discs 221. The transmission rod 225 is rotatably connected to the guide plates 223 of the two storage parts 22. The baffle 224 is fixedly installed on the guard (referred to as the right guard in the embodiment) away from the tension plate 12.

[0051] A vertical extension channel 2222 is fixedly installed on the inlet of each outer guard 222. The extension channel 2222 enables a plurality of standby winding rollers to be stacked on the inlet, so as to increase the storage quantity of the standby winding rollers on the storage assembly 20.

[0052] A supporting rod 226 is fixedly installed above the extension channel 2222. The supporting rod 226 is fixedly connected to one wall of the extension channel 2222 of the two storage parts 22. The supporting rod 226 is parallel to the driving winding roller 11.

[0053] Universal ball bearings 2212 are installed on the bottom of the accommodating grooves 2211 of the supporting inner disc 221. The part of the bottom of the accommodating grooves 2211 on which the ball bearings 2212 are not installed is provided with an elastic block. The elastic block in the embodiment is made of pearl wool (the elastic block is not shown in the figure). The universal ball bearings 2212 make the friction force that the guide plate 223 receives when guiding the standby winding roller to be centered smaller, so as to improve the smoothness in the automatic centering process. The existence of the pearl wool enables the pearl wool to buffer the standby winding roller under the gravity impact when the standby winding roller falls from the inlet to the accommodating groove 2211, so as to avoid the collision damage of the standby winding roller and the accommodating groove 2211 caused by the impact.

[0054] In addition, in the present embodiment, in order to reduce the maintenance cost of the support inner disc 221, the accommodating groove 2211 is installed in the form of an insert, and when the accommodating groove 2211 is damaged or is not suitable for storing the standby winding roller, the insert with the accommodating groove 2211 can be replaced individually.

[0055] The storage assembly 20 further comprises a buffer rod 23 installed below each support inner disc 221, the buffer rod 23 is rotationally connected to the rack 100, and the projection of the buffer rod 23 to the horizontal plane is perpendicular to the axial direction of the driving winding roller 11. An elastic member is installed between the buffer rod 23 and the rack 100, and the elastic member is a spring in the present embodiment. The free extension direction of the elastic member is vertical, and the free end of the buffer rod 23 is upwardly tilted and located below the discharge port 2221 in the free state.

[0056] The storage assembly 20 further comprises a pressing spray bottle 24 located below the storage portion 22, the pressing member of the pressing spray bottle 24 is located below the buffer rod 23, the pressing member of the pressing spray bottle 24 can be pressed by the buffer rod 23, and the nozzle 241 of the pressing spray bottle 24 faces the bearing on the standby winding roller. The pressing spray bottle 24 is installed on the rack 100 through a mounting seat 25. Specifically, the mounting seat 25 is provided with a spray bottle 24 placing through hole, and the mounting seat 25 is provided with a strip-shaped through hole 251. The strip-shaped through hole 251 is combined with a bolt and a nut to achieve the fixed connection between the mounting seat 25 and the rack 100. The length direction of the strip-shaped through hole 251 is parallel to the projection of the buffer rod 23 to the horizontal plane. The installation position of the pressing spray bottle 24 can be adjusted by moving the position of the mounting seat 25, so as to adjust the degree of pressing of the pressing spray bottle 24, and facilitate the adjustment of the amount of sprayed lubricating oil.

[0057] The baffle 224 of the support outer guard 222 is arranged beside the discharge port 2221, and the baffle 224 and the roller changing assembly 30 are located on the left and right sides of the discharge port 2221. The center of rotation of the buffer rod 23 is located on the side where the baffle 224 is located. When the standby winding roller falls from the accommodating groove 2211 along the discharge port 2221, the falling process is received by the buffer rod 23. Because the buffer rod 23 is inclined upward, the standby winding roller has a tendency to move away from the driving winding roller 11 after being supported by the buffer rod 23. However, because of the existence of the baffle 224, the movement of the standby winding roller along the length direction of the buffer rod 23 is hindered, thereby ensuring that the standby winding roller falls vertically to the standby position directly below the discharge port 2221 during the falling process, and the falling process is slower and the standby winding roller will not directly fall from the discharge port 2221 and hit the standby position on the rack 100.

[0058] The drive unit 21 is used to drive the rotation of the support inner disc 221.

[0059] The roll changing assembly 30 comprises a rotating plate 31, an incomplete guide disc 32 and a claw 33. The roll changing assembly 30 adopts the prior art, specifically, the rotating plate 31 coincides with the central axis of the driving winding roller 11, the guide disc 32 is provided with an incomplete guide surface which is an arc surface coaxial with the rotating plate 31, and the rotating plate 31 is fixedly connected with the driving shaft 212. The incomplete guide disc 32 is fixedly installed, the claw 33 comprises a fixed claw 331 and a movable claw 332, the fixed claw 331 is fixedly connected with the rotating plate 31, the movable claw 332 is rotatably connected with the fixed claw 331, and the movable claw 332 is provided with a rolling bearing 333. After the rolling bearing 333 contacts with the outer peripheral guide surface of the incomplete guide disc 32, the movable claw 332 and the fixed claw 331 form a complete claw 33 with a clamping groove, and then the complete claw 33 moves the standby winding roller in the standby position to the clamping groove of the claw 33, and then the standby winding roller originally located at the input side of the driving winding roller 11 is moved around the surface of the driving winding roller 11 and moved to the output side of the driving winding roller 11 along with the rotation of the rotating plate 31.

[0060] The driving unit 21 comprises a transmission gear set and a driver 211. The transmission gear set comprises a driving shaft 212, a driven shaft 213, a driving gear 214 and a driven gear 215. The driving gear 214 is an incomplete gear. In the embodiment, the number of accommodating grooves 2211 is four, and the number of teeth of the incomplete gear accounts for one fourth of the complete gear. The driving shaft 212 and the driven shaft 213 are rotatably connected to the rack 100 and are parallel to the driving winding roller 11. The driving gear 214 is fixedly installed on the driving shaft 212 together with the rotating plate 31. The driven gear 215 is installed on the driven shaft 213. The driving gear 214 and the driven gear 215 can be engaged. The driven shaft 213 is connected to the transmission rod 225 on the supporting inner disc 221 through a belt transmission. The driver 211 is used to drive the driving shaft 212 to rotate. The driver 211 can be an electric motor.

[0061] In addition, the driven gear 215 and the driven shaft 213 are matched through the axial sliding groove and the axial protrusion. For example, the driven shaft 213 is configured as a spline shaft. The driven gear 215 can be axially moved along the axial protrusion. When the driver 211 does not drive the supporting inner disc 221 to rotate, the driven gear 215 can be manually moved to axially offset the driving gear 214, so as to ensure that the rotation of the supporting inner disc 221 is not affected by the driving gear 214 on the driving shaft 212, and then the manual control of the rotation of the supporting inner disc 221 is facilitated when the storage assembly 20 is fully filled at one time.

[0062] The specific process of the embodiment is as follows:

[0063] I. Put spare winding roller on storage assembly 20: manually lift the spare winding roller, put one end of the spare winding roller on the support rod 226, then push the spare winding roller along the support rod 226 to the opposite side of the storage part 22, until the spare winding roller is close to the feeding port, then put the spare winding roller into the containing groove 2211 from the feeding port. Rotate the support inner disc 221, so that the containing groove 2211 containing the spare winding roller is rotated to be blocked by the outer guard 222, while the new containing groove 2211 without spare winding roller is aligned with the feeding port, facilitating the storage of the next spare winding roller. Use the above steps to operate the support inner disc 221 until the support inner disc 221 is placed with multiple spare winding rollers.

[0064] II. Put spare winding roller on storage assembly 20 to spare position: after the driver 211 is started, the power is transmitted to the transmission rod 225 through the driving shaft 212, the driving gear 214, the driven gear 215, the driven shaft 213, and finally the belt, so that the support inner disc 221 rotates by a certain angle, so that the spare winding roller in the containing groove 2211 adjacent to the discharge port 2221 is transferred to directly opposite the discharge port 2221. The spare winding roller falls from the discharge port 2221 to the spare position under the action of gravity. During the falling process, the buffer rod 23 supports the spare winding roller, so that the spare winding roller falls vertically along the baffle 224 slowly, avoiding damage caused by collision when the spare winding roller falls; at the same time, during the falling process, the buffer rod 23 is pressed, so that the pressing spray pot 24 is pressed, and the lubricating oil contained in the pressing spray pot 24 is sprayed from the nozzle 241 to the bearings of the spare winding roller (the spare winding roller has bearings at both ends of the air inflation shaft), achieving lubrication of the bearings of the spare winding roller. In addition, during the rotation of the support inner disc 221, the guide surface 2231 on the left and right guide plates 223 on both sides of the film guides the uncentered spare winding roller, so that the spare winding roller moves in the axial direction to achieve automatic centering adjustment.

[0065] III. Transfer spare winding roller from spare position to tension plate 12 through roller changing assembly 30: after the driver 211 is started, the rotating plate 31 also rotates with the driving shaft 212, the pawl 33 on the rotating plate 31 rotates upward from the lower side of the rotating plate 31, and during the upward rotation, the rolling bearing 333 on the movable pawl 332 gradually abuts against the incomplete guide disc 32, so that the pawl 33 forms a fixed opening pawl 33. The opening of the pawl 33 rotates to the spare position to clamp the spare winding roller, and the pawl 33 clamping the spare winding roller continues to rotate with the rotating plate 31, and the spare winding roller is transferred from the input side of the driving winding roller 11 to the U-shaped clamping groove of the tension plate 12 on the output side, completing the roller changing action of the spare winding roller.

[0066] Compared with the prior art, the film roll changing mechanism 200 is improved, so that the whole system can not only store the spare winding roller, but also automatically lower the stored spare winding roller to the spare position when needed, and automatically adjust the centering of the spare winding roller. In addition, the storage assembly 20 shares a driver 211 with the rotating claw 33 driving the roller changing assembly 30, which is conducive to energy saving and more suitable for the existing limited space design layout.

[0067] In addition, the optimized setting of the film roll changing mechanism 200 ensures that the spare winding roller will not be subjected to a large impact, and the bearing of the spare winding roller is lubricated during the process of lowering the spare winding roller to the spare position, thereby prolonging the service life of the spare winding roller.

[0068] The above is only an embodiment of the present application, and well-known specific technical solutions and / or common knowledge in the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the technical solutions of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A film winding and changing roller mechanism, comprising a jaw capable of transferring a spare take-up roller from the input side to the output side of an active take-up roller, characterized in that: It also includes a storage assembly located on the input side of the active take-up roller. The storage assembly includes a drive unit and two storage sections symmetrically arranged about the film conveying direction. Each storage section includes a self-rotating inner support disk and a fixedly installed outer protective component. The outer protective component surrounds the inner support disk. The inner support disk has multiple receiving grooves with openings facing the outer protective component around its circumference. The receiving grooves are parallel to the active take-up roller. The outer protective component has a feed inlet and a discharge outlet. The feed inlet is located above the discharge outlet, and both the feed inlet and discharge outlet can be directly opposite the openings of the receiving grooves. The drive unit includes a transmission gear set and a driver. The transmission gear set includes a drive gear, a driven gear, a drive shaft, and a driven shaft. The drive gear is an incomplete gear. The drive gear and a chuck are fixedly installed on the drive shaft. The driven gear is installed on the driven shaft. The drive gear and the driven gear can mesh. The driven shaft is connected to the inner support disk. The driver drives the drive shaft to rotate. The driven gear and the driven shaft are engaged by an axial groove and an axial protrusion. The driven gear can move axially along the axial protrusion. The storage section also includes a buffer rod disposed below the inner support plate. The buffer rod is rotatably connected to the frame. An elastic element is provided between the buffer rod and the frame. The free end of the buffer rod is tilted upward in the free state and located below the discharge port. It also includes a press sprayer located below the storage section. The press element of the press sprayer is located below the buffer rod. The press element of the press sprayer can be pressed by the buffer rod. The nozzle of the press sprayer faces the bearing on the spare take-up roller. A baffle is provided on the side of the discharge port. The baffle and the chuck are located on both sides of the discharge port. The rotation center of the buffer rod is located on the side where the baffle is located.

2. The film winding and changing roller mechanism according to claim 1, characterized in that: The storage section also includes a fixedly installed guide plate. The guide plates on the two storage sections are located outside the two supporting inner plates. The guide plates are provided with inclined guide surfaces, and the two guide surfaces form a V shape.

3. The film winding and changing roller mechanism according to claim 2, characterized in that: The outer protective component is fixedly installed on the frame. The outer protective plate includes a left protective plate and a right protective plate. The surfaces of the left and right protective plates facing the inner supporting plate are both arc surfaces. The left and right protective plates are fixedly connected to the guide plate to form a whole. A transmission rod is fixedly connected between the two inner supporting plates. The transmission rod is rotatably connected to the guide plate of the two storage sections.

4. A film winding and changing roller mechanism according to claim 3, characterized in that: The storage assembly also includes a support rod fixedly installed between the outer protective plates of the two storage sections, with the support rod close to the feed inlet.

5. A film winding and changing roller mechanism according to claim 2, characterized in that: The bottom of the receiving groove is provided with ball bearings, and the part of the receiving groove where no ball bearings are installed is provided with elastic blocks.

6. A film roll changing system, characterized in that: The film winding mechanism as described in any one of claims 1-5 further includes a tension plate rotatably connected to the frame, the free end of the tension plate having a U-shaped groove, and a tension cylinder for driving the tension plate to rotate and ensuring that the take-up roller on the U-shaped groove is always close to the active take-up roller.

Images