A moving-out roll changing mechanism and an automatic deviation rectifying mechanism applied to a bag making and packaging machine

Abstract

The utility model relates to bag making and packaging machine technical field, concretely disclose a kind of removal and change roll mechanism and automatic rectification mechanism applied to bag making and packaging machine, including body, removal and change roll mechanism and rectification detection mechanism, removal and change roll mechanism includes drive assembly, track assembly and film release component, drive assembly is set in the inner bottom of the rack of body, rectification detection mechanism is installed in the side of drive assembly by two fixed seats, track assembly is set in the outside of rack, and it is in same mobile line with drive assembly, drive assembly drives film release component to move, to drive film release component removal or removal bag making and packaging machine.The utility model discloses the packaging machine by removal and change roll mechanism film release component removal or removal rack, to facilitate roll film removal or replacement;When removal, film on the roll can be released to the next process mechanism, to solve the problem that existing packaging machine space is limited and cannot replace roll.

Description

Technical Field

[0001] This utility model belongs to the technical field of bag making and packaging machines, specifically a roll changing mechanism and an automatic correction mechanism applied to bag making and packaging machines. Background Technology

[0002] Bag making and packaging machines are commonly used to make clothing bags, underwear bags, chemical fiber textile raw material bags, and nuclear power plant waste recycling and packaging. During the bag making process, film roll replacement is an essential step, and the faster the bag making speed, the higher the film replacement frequency.

[0003] The existing patent application CN115352127A discloses the structure of the main body of an automatic bag making machine. The main body of the existing bag making machine is equipped with a bag forming component, a pressing and bagging machine, a film releasing component, and a film tube forming module. However, this arrangement is prone to causing great inconvenience when the internal space of the bag making machine is limited, the nature of the bag film, and the packaging materials are affected by factors such as packaging materials. It can also cause bag film to shift. Therefore, there is an urgent need to design a roll changing mechanism and an automatic correction mechanism for bag making machines. Utility Model Content

[0004] The purpose of this invention is to provide a roll-changing mechanism and an automatic correction mechanism for use in bag making and packaging machines. This solves the problem mentioned above where existing film roll holders fixed inside bag making and packaging machines are prone to film misalignment when affected by single or multiple factors such as limited internal space of the packaging machine, the nature of the film, and the packaging materials. Furthermore, it also causes great inconvenience in replacing or adjusting film rolls, 100-kilogram film rolls, and heavier film rolls fixed inside the bag making and packaging machine.

[0005] To solve the above-mentioned technical problems, this utility model provides a roll-changing mechanism and an automatic correction mechanism for a bag-making and packaging machine, including a body, a roll-changing mechanism, and a correction detection mechanism. The roll-changing mechanism includes a drive assembly, a track assembly, and a film-releasing assembly. The drive assembly is located at the inner bottom of the frame of the body. The correction detection mechanism is mounted on one side of the drive assembly via two fixed seats. The track assembly is located on the outer side of the frame and is on the same moving line as the drive assembly. The drive assembly drives the film-releasing assembly to move, thereby moving the film-releasing assembly on the track assembly to move it out of or into the bag-making and packaging machine.

[0006] Furthermore, the correction detection mechanism includes an upper fixed beam, a lower fixed beam, and two sets of bag film correction measurement components. The upper fixed beam is located on the upper part of the fixed base, and the lower fixed beam is located on the lower part of the fixed base. The two sets of bag film correction measurement components are respectively located on the inner sides of the two ends of the upper fixed beam and the lower fixed beam, and the distance between the two sets of bag film correction measurement components is less than or equal to the width of the bag film.

[0007] Furthermore, each set of the bag film correction measurement components includes a transmitting sensor and a receiving sensor. The transmitting sensor is disposed on the inner side of the end of the upper fixed beam via a first mounting base, and the receiving sensor is disposed on the inner side of the end of the lower fixed beam. The transmitting sensor and the receiving sensor cooperate to sense.

[0008] Furthermore, the drive assembly is a synchronous belt pulley drive assembly, and the synchronous belt pulley drive assembly includes a drive wheel, a reversing wheel, a first drive motor, a synchronous belt, a pair of first linear guides, a sliding seat, a guide linear bearing, a synchronous belt connecting seat, and a synchronous belt connecting clamp. The drive wheel and the reversing wheel are respectively disposed on opposite inner sides of the frame via a second mounting seat. The second mounting seat and the reversing wheel are connected via a reversing shaft, and an anti-detachment component is installed at the end of the reversing shaft. The first drive motor is disposed on one side of the drive wheel, and its output shaft passes through the second mounting seat and the drive wheel and is fitted with the anti-detachment component. The synchronous belt is sleeved on the outside of the drive wheel and the reversing wheel, and is connected to the drive wheel and the reversing wheel via tooth meshing.

[0009] The two ends of the first linear guide rails are respectively embedded in the upper part of the oppositely arranged second mounting base and locked with screws.

[0010] The sliding seat is an inverted L-shape, with the shorter side of the L-shape facing downwards and vertically arranged. Two supporting guide wheels are located at the bottom of the shorter side of the sliding seat. Two sets of guide linear bearings are spaced apart at the bottom of the longer side of the L-shape of the sliding seat. Each set of guide linear bearings is fitted onto a pair of first linear guide rails. The synchronous belt connector is located at the bottom end of the longer side of the sliding seat.

[0011] The synchronous belt connecting clamp is disposed on the inner side of the upper section of the synchronous belt and is connected to it by teeth. A fastening bolt is provided on the synchronous belt connecting clamp. The fastening bolt passes through the synchronous belt and the synchronous belt connecting seat and is connected to the sliding seat.

[0012] Furthermore, the film release assembly includes a third mounting base, a film roll limiting roller, a film roll release drive shaft, a film roll release driven shaft, and a second drive motor.

[0013] Two third mounting seats are arranged opposite each other at both ends of the sliding seat. The two ends of the film roll release drive shaft and the film roll release driven shaft are respectively inserted into the two third mounting seats. Two film roll limiting rollers are respectively arranged on the inner side of the two third mounting seats through the second mounting beam. The two film roll limiting rollers abut against the two ends of the film roll on the film roll release drive shaft and the film roll release driven shaft, respectively.

[0014] The second drive motor is mounted on the sliding seat, and its output end is connected to one end of the membrane roll release drive shaft that extends out of the third mounting seat. The other ends of the membrane roll release drive shaft and the membrane roll release driven shaft that extend out of the third mounting seat are respectively fitted with a first synchronous sprocket and a second synchronous sprocket. The first synchronous sprocket and the second synchronous sprocket are connected by a synchronous chain.

[0015] Furthermore, both ends of the membrane roll release drive shaft and the membrane roll release driven shaft are respectively provided with seated bearings, and each of the seated bearings is fixed on the side wall of the third mounting base.

[0016] Furthermore, the track assembly includes four feet, a base plate, and a pair of second linear guides. The four feet are respectively disposed at the four corners of the base plate, which is disposed on the outside of the frame. The pair of second linear guides are disposed on the base plate, and the two supporting guide wheels are slidably connected to the pair of second linear guides.

[0017] The beneficial effects of this utility model are as follows: The bag making and packaging machine of this utility model moves the film release component out of or into the frame through the removal and roll changing mechanism, so that when moving out, the empty film roll can be unloaded from the film roll release drive shaft and the film roll release driven shaft, and the film roll with film can be installed on the film roll release drive shaft and the film roll release driven shaft; when moving in, the film on the film roll can be released to the mechanism of the next process, so as to solve the problem that the space inside the existing bag making and packaging machine is limited and the film roll cannot be disassembled or replaced.

[0018] The correction detection mechanism can detect whether the film roll on the film roll release drive shaft and the film roll release driven shaft is misaligned along the axial position. Before control, the position of the film roll is pre-limited by the film roll limit roller. If it is still misaligned, the correction detection mechanism will transmit the real-time measured data to the programmable controller of the control unit. The programmable controller issues a correction operation command based on the data vector. The first drive motor reverses or stops according to the command to adjust the axial position of the film roll on the film roll release drive shaft and the film roll release driven shaft. Through dual control, the film on the film roll can be in the required position to improve the consistency and pass rate of the bag making and packaging machine.

[0019] The setting of the correction detection mechanism uses a combination of transmitting and receiving sensors to determine whether the membrane is positioned between the transmitting and receiving sensors of the two sets of bag film correction measurement components. It also uses light-blocking to determine whether the membrane is off-center, thereby improving the accuracy of the film delivery position.

[0020] The drive assembly and the film release assembly are configured such that the drive assembly can move the film release assembly out of or into the frame, and the maximum stroke of the synchronous belt is limited by the synchronous belt connecting clamp on the inner side of the upper section of the synchronous belt of the drive assembly, so as to control the maximum stroke of the slide block, so as to prevent the slide block from disengaging from the drive assembly and improve the stability of the operation of the drive assembly and the slide block.

[0021] The track assembly ensures that the slide block is at the same height as the frame when it moves out, and also improves the smoothness of the slide block's movement, effectively preventing deviation between the slide block and the timing belt. Attached Figure Description

[0022] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a partial structural diagram of the bag making and packaging machine of this utility model, which includes a roll-changing mechanism and a deviation correction and detection mechanism.

[0024] Figure 2 yes Figure 1 Exploded view of the roll-changing mechanism in the middle;

[0025] Figure 3 yes Figure 1 Exploded view of the bag film correction measurement component;

[0026] In the diagram: 1-Frame, 2-Roll-changing mechanism, 3-Correction detection mechanism, 4-Fixed base, 21-Drive assembly, 22-Rail assembly, 23-Film release assembly, 31-Upper fixed beam, 32-Lower fixed beam, 33-Bag film correction measurement assembly, 331-Transmitting sensor, 332-Receiving sensor, 333-First mounting base, 211-Drive wheel, 212-Reversing wheel, 213-First drive motor, 214-Synchronous belt, 215-Second mounting base, 216-Reversing shaft, 217-Anti-detachment component, 218-First linear guide rail. 219-Sliding seat, 220-Guide linear bearing, 221-Foot seat, 222-Base plate, 223-Second linear guide rail, 234-Synchronous belt connecting seat, 235-Synchronous belt connecting clamp, 236-Third mounting seat, 237-Film roll limiting roller, 238-Film roll release drive shaft, 239-Film roll release driven shaft, 240-Second drive motor, 242-Supporting guide moving wheel, 243-Second mounting beam, 244-First synchronous sprocket, 245-Second synchronous sprocket, 246-Synchronous chain, 247-Bearing with seat. Detailed Implementation

[0027] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] In one specific embodiment of this utility model, such as Figure 1-3 As shown, a roll-changing mechanism and an automatic deviation correction mechanism for a bag-making and packaging machine are disclosed. The mechanism includes a main body, a roll-changing mechanism 2, and a deviation correction detection mechanism 3. The roll-changing mechanism 2 includes a drive assembly 21, a track assembly 22, and a film-releasing assembly 23. The drive assembly 21 is located at the bottom inner part of the frame 1 of the main body. The deviation correction detection mechanism 3 is mounted on one side of the drive assembly 21 via two fixed seats 4. The track assembly 22 is located on the outer side of the frame 1 and is on the same moving line as the drive assembly 21. The drive assembly 21 drives the film-releasing assembly 23 to move, thereby moving the film-releasing assembly 23 on the track assembly 22 to move out of or into the bag-making and packaging machine.

[0029] The correction detection mechanism 3 includes an upper fixed beam 31, a lower fixed beam 32, and two sets of bag film correction measurement components 33. The upper fixed beam 31 is located on the upper part of the fixed base 4, and the lower fixed beam 32 is located on the lower part of the fixed base 4. A storage rod of the storage buffer mechanism is installed between the two fixed bases 4. The two sets of bag film correction measurement components 33 are respectively located on the inner sides of the two ends of the upper fixed beam 31 and the lower fixed beam 32, and the distance between the two sets of bag film correction measurement components 33 is less than or equal to the width of the bag film.

[0030] Each bag film correction measurement assembly 33 includes a transmitting sensor 331 and a receiving sensor 332. The transmitting sensor 331 is mounted on the inner side of the end of the upper fixed beam 31 via the first mounting base 333, and the receiving sensor 332 is mounted on the inner side of the end of the lower fixed beam 32. The transmitting sensor 331 and the receiving sensor 332 cooperate to sense.

[0031] The drive assembly 21 is a synchronous belt pulley drive assembly, which includes a drive wheel 211, a reversing wheel 212, a first drive motor 213, a synchronous belt 214, a pair of first linear guides 218, a sliding seat 219, a guide linear bearing 220, a synchronous belt connecting seat 234, and a synchronous belt connecting clamp 235. The drive wheel 211 and the reversing wheel 212 are respectively mounted on the opposite inner side of the frame 1 through a second mounting seat 215. The second mounting seat 215 and the reversing wheel 212 are connected by a reversing shaft 216, and an anti-detachment component 217 is installed at the end of the reversing shaft 216. The first drive motor 213 is located on one side of the drive wheel 211, and its output shaft passes through the second mounting seat 215 and the drive wheel 211 and is equipped with the anti-detachment component 217. The synchronous belt 214 is sleeved on the outside of the drive wheel 211 and the reversing wheel 212, and is connected to the drive wheel 211 and the reversing wheel 212 by tooth meshing.

[0032] The two ends of a pair of first linear guides 218 are respectively embedded in the upper part of the oppositely arranged second mounting bases 215 and locked with screws.

[0033] The sliding seat 219 is an inverted L-shape, with the shorter side of the L-shape facing downwards and vertically arranged. Two supporting guide wheels 242 are located at the bottom of the shorter side of the sliding seat 219. Two sets of guide linear bearings 220 are spaced apart at the bottom of the longer side of the L-shape of the sliding seat 219. The two sets of guide linear bearings 220 are respectively fitted onto a pair of first linear guide rails 218. A synchronous belt connecting seat 234 is located at the bottom end of the longer side of the sliding seat 219.

[0034] The synchronous belt connecting clamp 235 is located on the inner side of the upper section of the synchronous belt 214 and is connected to it by teeth. The synchronous belt connecting clamp 235 is provided with fastening bolts, which pass through the synchronous belt 214 and the synchronous belt connecting seat 234 and are connected to the sliding seat 219.

[0035] The film release assembly 23 includes a third mounting base 236, a film roll limiting roller 237, a film roll release drive shaft 238, a film roll release driven shaft 239, and a second drive motor 240.

[0036] Two third mounting seats 236 are arranged opposite each other at both ends of the sliding seat 219. The two ends of the film roll release drive shaft 238 and the film roll release driven shaft 239 are respectively inserted into the two third mounting seats 236. Two film roll limiting rollers 237 are respectively arranged inside the two third mounting seats 236 via the second mounting beam 243. The two film roll limiting rollers (237) are used to limit the movable position of the film roll on the film roll release drive shaft 238 and the film roll release driven shaft 239.

[0037] The second drive motor 240 is mounted on the sliding seat 219, and its output end is connected to one end of the membrane roll release drive shaft 238 extending out of the third mounting seat 236. The other ends of the membrane roll release drive shaft 238 and the membrane roll release driven shaft 239 extending out of the third mounting seat 236 are respectively fitted with a first synchronous sprocket 244 and a second synchronous sprocket 245. The first synchronous sprocket 244 and the second synchronous sprocket 245 are connected by a synchronous chain 246.

[0038] The membrane roll release drive shaft 238 and the membrane roll release driven shaft 239 are respectively provided with seated bearings 247 at both ends, and each seated bearing 247 is fixed on the side wall of the third mounting base 236.

[0039] In this embodiment, the bag forming assembly is mounted on the inner top of the frame 1 via the first mounting beam 5 and is located above the drive assembly 21. The film tube forming module is located between the two fixed seats 4 and is mounted above the film release assembly 23. After the film is in place, the film on the film roll of the drive shaft 238 and the film roll release driven shaft 239 is released by the film release assembly 23 onto the guide mold cover of the film tube forming module and guided to the next process assembly for hot sealing.

[0040] The track assembly 22 includes four feet 221, a base plate 222, and a pair of second linear guide rails 223. The four feet 221 are respectively located at the four corners of the base plate 222. The base plate 222 is located on the outside of the frame 1. The pair of second linear guide rails 223 are located on the base plate 222. Two support guide wheels 242 are slidably connected to the pair of second linear guide rails 223.

[0041] The working process of this utility model is as follows:

[0042] The second drive motor 240 of the film release assembly 23 reverses to drive the film roll release drive shaft 238 and the film roll release driven shaft 239 to reverse, so as to release the bag film on the film roll of the film roll of the film roll release drive shaft 238 and the film roll release driven shaft 239, so as to release it onto the guide mold cover of the film tube forming module, and fold the two bag films through the guide mold cover and change them to the next process for hot sealing operation;

[0043] When the membrane roll is released and the empty membrane rolls on the membrane roll release drive shaft 238 and the membrane roll release driven shaft 239 need to be replaced, the first drive motor 213 drives the drive wheel 211 to rotate forward, thereby driving the synchronous belt 214 to rotate. At the same time, it drives the reversing wheel 212 to rotate synchronously. The synchronous belt connecting plate 235 on the inner side of the synchronous belt 214 moves from the direction near the drive wheel 211 to the direction of the reversing wheel 212, and at the same time drives the synchronous belt connecting seat 234, the sliding seat 219, and the guide linear bearing 220 fixed at the bottom of the sliding seat 219 to move. Meanwhile, the two sets of guide linear bearings 220 are respectively on a pair of first linear guide rails 218. The first drive motor 213 moves upward in the direction of the sliding 223 of the pair of second linear guides. When the guide linear bearing 220 is in contact with the inner end of the second mounting seat 215 near the sliding 223 of the pair of second linear guides, and the film roll release drive shaft 238 and film roll release driven shaft 239 on the sliding seat 219 are located on the outside of the frame 1, the first drive motor 213 stops rotating, the third mounting seat 236 on one side is removed, and the empty film roll on the film roll release drive shaft 238 and film roll release driven shaft 239 is removed and replaced with a film roll with film. When installing the film roll, one end of the film roll is first abutted against the film roll limiting roller 237, and then the third mounting seat 236 is installed back in its original position.

[0044] After installation, the first drive motor 213 drives the drive wheel 211 to reverse, thereby causing the synchronous belt 214 and the reversing wheel 212 to rotate synchronously. The synchronous belt connecting clamp 235 on the inner side of the synchronous belt 214 moves from near the reversing wheel 212 towards the drive wheel 211, and simultaneously moves the synchronous belt connecting seat 234, the sliding seat 219, and the guide linear bearing 220 fixed at the bottom of the sliding seat 219. At the same time, the two sets of guide linear bearings 220 move away from the pair of second linear guides 223 on a pair of first linear guides 218. When the guide linear bearing 220 is in contact with the inner end of the second mounting seat 215 away from the pair of second linear guides 223, and the inner side wall of the short side of the L-shaped sliding seat 219 is in contact with the outer side wall of the frame 1, the first drive motor 213 stops rotating.

[0045] Following the release method of the film release assembly 23, the film is released onto the guide mold cover of the film roll forming module. When the film passes between the transmitting sensor 331 and the receiving sensor 332 of the two sets of bag film correction measurement assemblies 33, if both ends of the film block the light emitted by the transmitting sensor 331, the transmitting sensor 331 will send a signal to the control unit. The control unit will then determine that the film roll is installed in place. If one end of the film cannot block the light emitted by the transmitting sensor 331, the transmitting sensor 331 will transmit the real-time measured data to the programmable controller of the control unit. The programmable controller issues a correction operation command based on the data vector. The first drive motor 213 reverses or stops according to the command to adjust the axial position of the sliding seat 219 and the film roll release drive shaft 238 and the film roll release driven shaft 239 on the sliding seat 219, so as to correct the position of the bag film and improve the accuracy of the bag film position.

[0046] The above-disclosed embodiment is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A roll-changing mechanism and an automatic deviation correction mechanism applied to a bag-making and packaging machine, characterized in that, The machine includes a main body, a roll-changing mechanism (2), and a deviation correction detection mechanism (3). The roll-changing mechanism (2) includes a drive assembly (21), a track assembly (22), and a film release assembly (23). The drive assembly (21) is located at the inner bottom of the frame (1) of the main body. The deviation correction detection mechanism (3) is mounted on one side of the drive assembly (21) via two fixed seats (4). The track assembly (22) is located on the outer side of the frame (1) and is on the same moving line as the drive assembly (21). The drive assembly (21) drives the film release assembly (23) to move, thereby moving the film release assembly (23) on the track assembly (22) to move out of or into the bag making and packaging machine.

2. The roll-changing mechanism and automatic deviation correction mechanism for a bag-making and packaging machine according to claim 1, characterized in that, The correction detection mechanism (3) includes an upper fixed beam (31), a lower fixed beam (32), and two sets of bag film correction measurement components (33). The upper fixed beam (31) is located on the upper part of the fixed base (4), and the lower fixed beam (32) is located on the lower part of the fixed base (4). The two sets of bag film correction measurement components (33) are respectively located on the inner sides of the two ends of the upper fixed beam (31) and the lower fixed beam (32), and the distance between the two sets of bag film correction measurement components (33) is less than or equal to the width of the bag film.

3. The roll-changing mechanism and automatic deviation correction mechanism for a bag-making and packaging machine according to claim 2, characterized in that, Each of the bag film correction measurement components (33) includes a transmitting sensor (331) and a receiving sensor (332). The transmitting sensor (331) is mounted on the inner side of the end of the upper fixed beam (31) via a first mounting base (333), and the receiving sensor (332) is mounted on the inner side of the end of the lower fixed beam (32). The transmitting sensor (331) and the receiving sensor (332) cooperate to sense.

4. The roll-changing mechanism and automatic deviation correction mechanism for a bag-making and packaging machine according to claim 1, characterized in that, The drive assembly (21) is a synchronous belt pulley drive assembly, and the synchronous belt pulley drive assembly includes a drive wheel (211), a reversing wheel (212), a first drive motor (213), a synchronous belt (214), a pair of first linear guides (218), a sliding seat (219), a guide linear bearing (220), a synchronous belt connecting seat (234), and a synchronous belt connecting clamp (235). The drive wheel (211) and the reversing wheel (212) are respectively mounted on the opposite inner sides of the frame (1) via a second mounting seat (215). 15) The first drive motor (213) is connected to the reversing wheel (211) via a reversing shaft (216), and an anti-detachment component (217) is installed at the end of the reversing shaft (216). The first drive motor (213) is located on one side of the drive wheel (211), and its output shaft passes through the second mounting base (215) and the drive wheel (211) and is then installed with the anti-detachment component (217). The synchronous belt (214) is sleeved on the outside of the drive wheel (211) and the reversing wheel (212), and is connected to the drive wheel (211) and the reversing wheel (212) via tooth meshing. The two ends of a pair of first linear guides (218) are respectively embedded in the upper part of the oppositely arranged second mounting bases (215) and locked with screws. The sliding base (219) is an inverted L-shape, with the short side of the L-shape of the sliding base (219) facing downwards and vertically arranged. Two supporting guide wheels (242) are provided at the bottom of the short side of the sliding base (219). Two sets of guide linear bearings (220) are spaced apart at the bottom of the long side of the L-shape of the sliding base (219). The two sets of guide linear bearings (220) are respectively sleeved on a pair of first linear guides (218). The synchronous belt connecting seat (234) is located at the bottom end of the long side of the sliding base (219). The synchronous belt connecting clamp (235) is disposed on the inner side of the upper section of the synchronous belt (214) and is connected to it by teeth. A fastening bolt is provided on the synchronous belt connecting clamp (235). The fastening bolt passes through the synchronous belt (214) and the synchronous belt connecting seat (234) and is connected to the sliding seat (219).

5. The roll-changing mechanism and automatic deviation correction mechanism for a bag-making and packaging machine according to claim 4, characterized in that, The film release assembly (23) includes a third mounting base (236), a film roll limiting roller (237), a film roll release drive shaft (238), a film roll release driven shaft (239), and a second drive motor (240). Two third mounting seats (236) are arranged opposite each other at both ends of the sliding seat (219). The two ends of the film roll release drive shaft (238) and the film roll release driven shaft (239) are respectively inserted into the two third mounting seats (236). Two film roll limiting rollers (237) are respectively arranged on the inner side of the two third mounting seats (236) through the second mounting beam (243). The two film roll limiting rollers (237) are used to limit the movable position of the film roll on the film roll release drive shaft (238) and the film roll release driven shaft (239). The second drive motor (240) is mounted on the sliding seat (219), and its output end is connected to one end of the membrane roll release drive shaft (238) that extends out of the third mounting seat (236). The other ends of the membrane roll release drive shaft (238) and the membrane roll release driven shaft (239) that extend out of the third mounting seat (236) are respectively fitted with a first synchronous sprocket (244) and a second synchronous sprocket (245). The first synchronous sprocket (244) and the second synchronous sprocket (245) are connected by a synchronous chain (246).

6. The roll-changing mechanism and automatic deviation correction mechanism for a bag-making and packaging machine according to claim 5, characterized in that, The membrane roll release drive shaft (238) and the membrane roll release driven shaft (239) are respectively provided with seated bearings (247) at both ends, and each seated bearing (247) is fixed on the side wall of the third mounting base (236).

7. The roll-changing mechanism and automatic deviation correction mechanism for a bag-making and packaging machine according to claim 5, characterized in that, The track assembly (22) includes feet (221), a base plate (222), and a pair of second linear guides (223). There are four feet (221) and they are respectively disposed at the four corners of the base plate (222). The base plate (222) is disposed on the outside of the frame (1). The pair of second linear guides (223) is disposed on the base plate (222). Two support guide wheels (242) are slidably connected to the pair of second linear guides (223).

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