Cigarette stack plastic outer package cutting device

Abstract

The invention relates to the technical field of cigarette stack unpacking, and discloses a cigarette stack plastic outer package cutting device which comprises a cutting mechanism and a feeding mechanism, a frame body is arranged above the cutting mechanism, auxiliary mechanisms are arranged at the two ends of the frame body, and each auxiliary mechanism comprises a driving assembly and an auxiliary assembly. The auxiliary assembly comprises an installation frame, a friction roller and a driving motor, the installation frame is slidably installed on the frame body in the length direction of the frame body, the driving assembly is used for driving the installation frame to move, the friction roller and the driving motor are both installed on the installation frame, and when the friction roller is tightly attached to the tobacco stack plastic outer package, the friction roller is driven to move. The driving motor drives the friction roller to rotate, and the friction roller lifts the redundant part of the outer plastic package externally lapped on the two sides of the outer plastic package of the tobacco stack upwards through friction force. The cutting device is used for solving the problems that in the prior art, when cutting equipment is used for cutting, redundant parts on the tops of outer packages can be cut off, fall around and are difficult to collect and treat.

Description

Technical Field

[0001] The invention relates to the technical field of cigarette stack unpacking, in particular to a cigarette stack plastic outer packaging cutting device. Background Art

[0002] The existing cigarette stacks have plastic outer packaging. When unpacking, the outer packaging needs to be cut by cutting equipment so as to remove the outer packaging from the cigarette stack.

[0003] For example, Chinese patent [Publication No.: CN105691782A] discloses an automatic cigarette box unpacking method and equipment. The equipment includes a conveyor track for transporting cigarette cartons, with an inner plastic bag cutter located in the middle of the track. The inner plastic bag cutter is equipped with four cutting blades mounted on four blade holders and driven by a rotary cylinder. A static weighing device is located at the end of the conveyor track, and a cigarette bag rejection device is installed on one side of the static weighing device. The addition of the inner plastic bag cutter to cut and grasp the inner plastic bag improves the unpacking process.

[0004] During actual use, since the excess part of the top of the plastic outer packaging will drape over the two sides of the plastic outer packaging, when the cutting equipment cuts, the excess part of the top of the outer packaging will be cut off and fall everywhere, making it difficult to collect and process. Even some of the cut plastic will follow the cigarette stack into the subsequent processing steps, affecting product quality. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a device for cutting the plastic outer packaging of cigarette stacks to solve the problem in the prior art that when the cutting equipment is cutting, the excess part on the top of the outer packaging will be cut off and fall everywhere, making it difficult to collect and process.

[0006] The present invention solves the above technical problems through the following technical means:

[0007] A device for cutting the plastic outer packaging of a cigarette stack comprises a cutting mechanism and a feeding mechanism. A frame is provided above the cutting mechanism. Auxiliary mechanisms are provided at both ends of the frame. The auxiliary mechanism comprises a driving assembly and an auxiliary assembly. The auxiliary assembly comprises a mounting frame, a friction roller and a driving motor. The mounting frame is slidably mounted on the frame along the length direction of the frame. The driving assembly is used to drive the mounting frame to move. The friction roller and the driving motor are both mounted on the mounting frame. When the friction roller is in close contact with the plastic outer packaging of the cigarette stack, the driving motor drives the friction roller to rotate. The friction roller lifts up the excess plastic outer packaging on both sides of the plastic outer packaging of the cigarette stack through friction force.

[0008] By setting up the above structure, the drive motor is controlled to drive the friction roller to rotate. The friction roller uses friction force to lift the excess plastic outer packaging on both sides of the plastic outer packaging of the cigarette stack upwards, so that it is away from the cutting position of the cutting mechanism, effectively avoiding the problem that the excess part on the top of the outer packaging will be cut off and fall everywhere, making it difficult to collect and process.

[0009] Furthermore, a movable frame is rotatably connected to the mounting frame, and the movable frame is slidably installed on the frame along the length direction of the frame. The driving assembly is transmission-connected to the movable frame, and a mounting plate is provided on the mounting frame. Both ends of the mounting plate are provided with a first distance detection sensor on one side close to the cigarette stack, and the first distance detection sensor is used to detect the distance between the mounting plate and the cigarette stack.

[0010] By setting up the above structure, when the two first distance detection sensors on the mounting frame both detect that the distance between the mounting frame and the cigarette stack has reached a preset position, it indicates that the friction roller is in close contact with the plastic outer packaging of the cigarette stack, effectively improving the accuracy of the friction roller's movement and avoiding the situation where the friction roller and the plastic outer packaging of the cigarette stack are too tight or too loose. In addition, when the cigarette stack is tilted due to angular deviation during transportation, the movable frame drives the mounting frame to move, and one end of the friction roller will first be in close contact with the cigarette stack. As the movable frame continues to move, the mounting frame rotates relative to the movable frame, causing the other end of the friction roller to also be in close contact with the cigarette stack, until the two first distance detection sensors on the mounting frame both detect that the distance between the mounting frame and the cigarette stack has reached a preset position. This can adapt to cigarette stacks that have deviated or tilted.

[0011] Furthermore, limit bars are provided at both ends of the bottom of the movable frame, and two limit blocks are provided at both ends of the top of the mounting frame. The two limit blocks are respectively located on both sides of the limit bar. When the movable frame and the mounting frame rotate relative to each other, the limit bar and the two limit blocks limit the angle of relative rotation of the movable frame and the mounting frame.

[0012] By providing the above structure, the relative rotation angle between the movable frame and the mounting frame is limited, thereby preventing the mounting frame from rotating in the opposite direction.

[0013] Furthermore, a movable frame is installed below the mounting frame, and the movable frame is slidably connected to the mounting frame along the height direction of the mounting frame. The friction roller is rotatably installed on the movable frame, and the output shaft of the drive motor is transmission-connected to the friction roller. An elastic member is provided between the movable frame and the mounting frame, and the elastic member is used to make the movable frame have a tendency to move toward the mounting frame. A second distance detection sensor is provided between the movable frame and the mounting frame, and the second distance detection sensor is used to detect the distance between the movable frame and the mounting frame.

[0014] By setting the above structure, when the excess part is lifted upward, the friction roller directly contacts the plastic outer packaging outside the cigarette stack, and the friction roller rotates to lift the plastic outer packaging outside the cigarette stack upward, so that the plastic outer packaging outside the cigarette stack is straightened in the height direction. At this time, the friction roller rotates to move downward along the height direction of the cigarette stack. When the friction roller moves, it drives the movable frame to move downward along the height direction of the cigarette stack. During the movement of the movable frame, the compressed elastic part moves downward until the second distance detection sensor on the movable frame detects that the distance between the pressure plate and the mounting frame reaches the preset position. The drive motor automatically stops rotating, and there is no need to manually control the working time of the drive motor.

[0015] Furthermore, a mounting shaft is rotatably provided on the movable frame, the friction roller is fixedly sleeved on the mounting shaft, the drive motor is fixedly installed on one end of the movable frame, and the output shaft of the drive motor is fixedly connected to the mounting shaft.

[0016] Furthermore, a counterweight is provided at one end of the movable frame away from the driving motor.

[0017] By providing the above structure, the weight at both ends of the movable frame is balanced, thereby preventing the movable frame from getting stuck when moving along the height direction of the cigarette stack.

[0018] Furthermore, connecting blocks are provided at both ends of the movable frame, connecting rods are fixedly provided at both ends of the bottom of the mounting frame, a connecting groove is provided on the connecting block, a pressure plate is fixedly connected to the top of the connecting groove, the free end of the connecting rod passes through the pressure plate and is inserted into the connecting groove, and a limiting ring is provided at the free end of the connecting rod, which is used to prevent the connecting rod from detaching from the pressure plate.

[0019] By providing the above structure, the movable frame can be slidably connected to the mounting frame along the height direction of the mounting frame.

[0020] Furthermore, the elastic member is sleeved on the connecting rod, one end of the elastic member abuts against the limiting ring, and the other end abuts against the pressing plate.

[0021] Furthermore, the second distance detection sensor is fixedly arranged on the top of the pressing plate.

[0022] Furthermore, a stopper is provided on the movable frame in a direction away from the cigarette stack, and the lower surface of the stopper is in contact with the friction roller.

[0023] By setting up the above structure, the excess plastic lifted by the friction roller is blocked. On the one hand, it prevents the excess plastic from falling from the end of the friction roller away from the cigarette stack, and on the other hand, it prevents the excess plastic from being wrapped around the friction roller.

[0024] Beneficial effects of the present invention:

[0025] 1. The present invention provides a frame, a drive assembly, a mounting frame, a friction roller and a drive motor, and controls the drive motor to drive the friction roller to rotate. The friction roller lifts the excess plastic outer packaging on both sides of the cigarette stack upwards through friction, so that it is away from the cutting position of the cutting mechanism, effectively preventing the excess part on the top of the outer packaging from being cut off and falling everywhere, making it difficult to collect and process.

[0026] 2. The present invention provides a movable frame and a first distance detection sensor. When both first distance detection sensors on the mounting frame detect that the distance between the mounting frame and the cigarette stack has reached a preset position, it indicates that the friction roller is in close contact with the plastic outer packaging of the cigarette stack, effectively improving the accuracy of the friction roller's movement and preventing the friction roller from being too tightly or too loosely attached to the plastic outer packaging of the cigarette stack. Furthermore, when the cigarette stack tilts due to angular offset during transportation, the movable frame drives the mounting frame to move, and one end of the friction roller will first be in close contact with the cigarette stack. As the movable frame continues to move, the mounting frame rotates relative to the movable frame, causing the other end of the friction roller to also be in close contact with the cigarette stack until both first distance detection sensors on the mounting frame detect that the distance between the mounting frame and the cigarette stack has reached a preset position. This allows the present invention to accommodate cigarette stacks that have deviated or tilted.

[0027] 3. The present invention is provided with a movable frame, an elastic member and a second distance detection sensor. When the excess part is lifted upward, the friction roller directly contacts the plastic outer packaging outside the cigarette stack. The friction roller rotates to lift the plastic outer packaging outside the cigarette stack upward, so that the plastic outer packaging outside the cigarette stack is straightened in the height direction. At this time, the friction roller rotates to move downward along the height direction of the cigarette stack. When the friction roller moves, it drives the movable frame to move downward along the height direction of the cigarette stack. During the movement of the movable frame, the elastic member is compressed downward until the second distance detection sensor on the movable frame detects that the distance between the pressure plate and the mounting frame reaches the preset position. The drive motor automatically stops rotating without the need to manually control the working time of the drive motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the three-dimensional structure of a device for cutting plastic outer packaging of cigarette stacks according to the present invention;

[0029] Figure 2 This is a schematic plan view of the structure of a device for cutting plastic outer packaging of cigarette stacks according to the present invention;

[0030] Figure 3 This is a schematic structural diagram of an auxiliary component in a device for cutting plastic outer packaging of cigarette stacks according to the present invention;

[0031] Figure 4 This is a schematic diagram of the disassembly structure of the auxiliary components in the cigarette stack plastic packaging cutting device of the present invention. Figure 1 ;

[0032] Figure 5This is a schematic diagram of the disassembly structure of the auxiliary components in the cigarette stack plastic packaging cutting device of the present invention. Figure 2 ;

[0033] Figure 6 This is a schematic cross-sectional view of a connecting block in a device for cutting plastic outer packaging of cigarette stacks according to the present invention;

[0034] in,

[0035] 11. Cutting mechanism; 12. Feeding mechanism;

[0036] 2. Frame;

[0037] 3. Auxiliary institutions;

[0038] 4. Drive components;

[0039] 5. Auxiliary components; 51. Mounting frame; 511. Mounting plate; 512. First distance detection sensor; 513. Limit block; 514. Connecting rod; 515. Limit ring; 52. Friction roller; 53. Drive motor;

[0040] 6. Mobile rack; 61. Limiting strip;

[0041] 7. Movable frame; 71. Elastic member; 72. Second distance detection sensor; 73. Mounting shaft; 74. Counterweight; 75. Connecting block; 751. Connecting groove; 752. Pressing plate; 76. Stopper. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] like Figures 1-6As shown, a device for cutting the plastic outer packaging of a cigarette stack of the present invention comprises a cutting mechanism 11 and a feeding mechanism 12. The cutting mechanism 11 and the feeding mechanism 12 are already well known in the prior art, so they will not be described in detail here. A frame 2 is provided above the cutting mechanism 11, and auxiliary mechanisms 3 are provided at both ends of the frame 2. The auxiliary mechanism 3 comprises a driving assembly 4 and an auxiliary assembly 5. The auxiliary assembly 5 comprises a mounting frame 51, a friction roller 52 and a driving motor 53. The mounting frame 51 is slidably mounted on the frame 2 along the length direction of the frame 2. The driving assembly 4 is used to drive the mounting frame 51 to move. The friction roller 52 and the driving motor 53 are both mounted on the mounting frame 51. When the friction roller 52 is in close contact with the plastic outer packaging of the cigarette stack, the driving motor 53 drives the friction roller 52 to rotate. The friction roller 52 lifts the excess plastic outer packaging on both sides of the plastic outer packaging of the cigarette stack upwards through friction. During use, the drive motor 53 is controlled to drive the friction roller 52 to rotate. The friction roller 52 lifts the excess plastic outer packaging on both sides of the plastic outer packaging of the cigarette stack upward through friction force, so that it is away from the cutting position of the cutting mechanism 11, effectively avoiding the problem that the excess part on the top of the outer packaging will be cut off and fall everywhere, making it difficult to collect and process.

[0044] In this embodiment, the mounting frame 51 is rotatably connected to the movable frame 6. Specifically, a through hole is provided at the top of the mounting frame 51, and a connecting column is provided at the bottom of the movable frame 6. The connecting column is inserted into the through hole, and a limit plate is fixedly provided at the end of the connecting column. The limit plate is used to limit the connecting column in the through hole to prevent the connecting column from detaching from the mounting frame 51. The movable frame 6 is slidably installed on the frame body 2 along the length direction of the frame body 2. Specifically, the movable frame 6 includes an upper plate and a lower plate. A connecting block 75 is provided between the upper plate and the lower plate. A slide groove is provided on the frame body 2 along the length direction of the frame body 2, and the connecting block 75 is slidably set in the slide groove. The drive assembly 4 is in transmission connection with the movable frame 6. In this embodiment, the drive assembly 4 is configured as a linear motor. A mounting plate 511 is fixedly mounted on the mounting frame 51. First distance detection sensors 512 are disposed on both ends of the mounting plate 511, adjacent to the cigarette stack. In this embodiment, the first distance detection sensor 512 and the second distance detection sensor 72 described below are both configured as infrared sensors. In other embodiments, they may also be configured as laser ranging sensors or ultrasonic sensors. The first distance detection sensor 512 is used to detect the distance between the mounting plate 511 and the cigarette stack.

[0045] During operation, when the two first distance detection sensors 512 on the mounting frame 51 both detect that the distance between the mounting frame 51 and the cigarette stack has reached a preset position, it indicates that the friction roller 52 is in close contact with the plastic outer packaging of the cigarette stack, effectively improving the accuracy of the movement of the friction roller 52 and avoiding the situation where the friction roller 52 and the plastic outer packaging of the cigarette stack are too tight or too loose. Moreover, when the cigarette stack is tilted due to angular deviation during transportation, the mobile frame 6 drives the mounting frame 51 to move, and one end of the friction roller 52 will first be in close contact with the cigarette stack. As the mobile frame 6 continues to move, the mounting frame 51 rotates relative to the mobile frame 6, causing the other end of the friction roller 52 to also be in close contact with the cigarette stack, until the two first distance detection sensors 512 on the mounting frame 51 both detect that the distance between the mounting frame 51 and the cigarette stack has reached a preset position, which can adapt to cigarette stacks that have deviated or tilted.

[0046] In this embodiment, limit bars 61 are provided at both ends of the bottom of the movable frame 6, and two limit blocks 513 are provided at both ends of the top of the mounting frame 51. The two limit blocks 513 are respectively located on both sides of the limit bar 61. When the movable frame 6 and the mounting frame 51 rotate relative to each other, the limit bar 61 and the two limit blocks 513 limit the relative rotation angle of the movable frame 6 and the mounting frame 51, thereby preventing the mounting frame 51 from rotating in the opposite direction.

[0047] In this embodiment, a movable frame 7 is installed below the mounting frame 51. The movable frame 7 is slidably connected to the mounting frame 51 along the height direction of the mounting frame 51. The friction roller 52 is rotatably installed on the movable frame 7. The output shaft of the drive motor 53 is transmission-connected to the friction roller 52. An elastic member 71 is provided between the movable frame 7 and the mounting frame 51. The elastic member 71 is used to make the movable frame 7 have a tendency to move toward the mounting frame 51. A second distance detection sensor 72 is provided between the movable frame 7 and the mounting frame 51. The second distance detection sensor 72 is used to detect the distance between the movable frame 7 and the mounting frame 51.

[0048] During operation, after the excess part is lifted upward, the friction roller 52 directly contacts the plastic outer packaging outside the cigarette stack. The friction roller 52 rotates to lift the plastic outer packaging outside the cigarette stack upward, so that the plastic outer packaging outside the cigarette stack is straightened in the height direction. At this time, the friction roller 52 rotates to move downward along the height direction of the cigarette stack. When the friction roller 52 moves, it drives the movable frame 7 to move downward along the height direction of the cigarette stack. During the movement of the movable frame 7, the compression elastic member 71 moves downward until the second distance detection sensor 72 on the movable frame 7 detects that the distance between the pressure plate 752 and the mounting frame 51 reaches the preset position. The drive motor 53 automatically stops rotating, and there is no need to manually control the working time of the drive motor 53.

[0049] It can be understood that in this embodiment, an industrial computer can be used as the core control unit to achieve precise process coordination of various components such as the cutting mechanism 11, feeding mechanism 12, drive component 4, first distance detection sensor 512, drive motor 53, and second distance detection sensor 72.

[0050] In this embodiment, a mounting shaft 73 is rotatably mounted on the movable frame 7. The friction roller 52 is fixedly sleeved on the mounting shaft 73. The drive motor 53 is fixedly mounted on one end of the movable frame 7, and the output shaft of the drive motor 53 is fixedly connected to the mounting shaft 73. A counterweight 74 is provided on the end of the movable frame 7 away from the drive motor 53. This balances the weight at both ends of the movable frame 7 and prevents the movable frame 7 from jamming as it moves along the height of the cigarette stack.

[0051] In this embodiment, connecting blocks 75 are provided at both ends of the movable frame 7, and connecting rods 514 are fixedly provided at both ends of the bottom of the mounting frame 51. In this embodiment, the connecting rods 514 are fixedly connected to the mounting frame 51 by means of a threaded connection, facilitating subsequent disassembly and maintenance. A connecting slot 751 is defined in the connecting block 75, and a pressure plate 752 is fixedly connected to the top of the connecting slot 751. The free end of the connecting rod 514 passes through the pressure plate 752 and is inserted into the connecting slot 751. A limit ring 515 is provided at the free end of the connecting rod 514. The limit ring 515 is used to prevent the connecting rod 514 from separating from the pressure plate 752, thereby enabling the movable frame 7 to slide along the height direction of the mounting frame 51 and be connected to the mounting frame 51.

[0052] In this embodiment, the elastic member 71 is sleeved on the connecting rod 514, with one end of the elastic member 71 abutting against the limiting ring 515 and the other end abutting against the pressure plate 752. In this embodiment, the elastic member 71 is configured as a compression spring. In other embodiments, a tension spring may also be selected after adaptively modifying the structure.

[0053] In this embodiment, the second distance detection sensor 72 is fixedly set on the top of the pressure plate 752. In some other embodiments, the second distance detection sensor 72 can also be set at other positions that can detect the distance between the movable frame 7 and the mounting frame 51, such as on the stop block 76 below.

[0054] In this embodiment, a stopper 76 is provided on the movable frame 7 in a direction away from the cigarette stack, and the lower surface of the stopper 76 is in contact with the friction roller 52. During operation, the stopper 76 blocks the excess plastic lifted by the friction roller 52, on the one hand, preventing the excess plastic from falling from the end of the friction roller 52 away from the cigarette stack, and on the other hand, preventing the excess plastic from being entangled on the friction roller 52.

[0055] The working principle of the present invention is as follows:

[0056] First, the feeding mechanism 12 conveys the cigarette stack to the plastic outer packaging cutting station.

[0057] Then, the linear motors at both ends of the control frame 2 work, and the linear motors push the movable frame 6 to move toward the direction close to the cigarette stack, and the movable frame 6 drives the mounting frame 51 to move toward the direction close to the cigarette stack. When the two first distance detection sensors 512 on the mounting frame 51 both detect that the distance between the mounting frame 51 and the cigarette stack reaches the preset position, that is, the friction roller 52 is in close contact with the plastic outer packaging of the cigarette stack, the linear motor stops pushing the movable frame 6 to move and keeps the position of the movable frame 6 fixed.

[0058] It should be noted that when the cigarette stack is tilted due to angle offset during transportation, the movable frame 6 drives the mounting frame 51 to move, and one end of the friction roller 52 will first be in close contact with the cigarette stack. As the movable frame 6 continues to move, the mounting frame 51 rotates relative to the movable frame 6, so that the other end of the friction roller 52 is also in close contact with the cigarette stack, until the two first distance detection sensors 512 on the mounting frame 51 detect that the distance between the mounting frame 51 and the cigarette stack reaches the preset position.

[0059] Subsequently, the drive motor 53 is controlled to operate, and the drive motor 53 drives the mounting shaft 73 to rotate, which in turn drives the friction roller 52 to rotate. During the rotation of the friction roller 52, the friction between the friction roller 52 and the plastic outer packaging drives the plastic outer packaging to move upward, lifting the excess plastic outer packaging on both sides of the plastic outer packaging of the cigarette stack upward and away from the cutting position of the cutting mechanism 11. When the excess plastic outer packaging is lifted upward, the friction roller 52 directly contacts the plastic outer packaging outside the cigarette stack. The friction roller 52 rotates to lift the plastic outer packaging outside the cigarette stack upward, straightening the plastic outer packaging outside the cigarette stack in the height direction. At this time, the friction roller 52 rotates to move downward along the height direction of the cigarette stack. When the friction roller 52 moves, it drives the movable frame 7 to move downward along the height direction of the cigarette stack. During the movement of the movable frame 7, the pressure plate 752 moves downward to compress the spring until the second distance detection sensor 72 on the pressure plate 752 detects that the distance between the pressure plate 752 and the mounting frame 51 reaches a preset position, at which time the drive motor 53 stops rotating.

[0060] Finally, the cutting mechanism 11 is controlled to cut the plastic outer packaging of the cigarette stack. After the cutting is completed, the linear motor is controlled to work, and the linear motor pulls the movable frame 6 to move away from the cigarette stack, so that each component is reset to facilitate the next auxiliary cutting.

[0061] The above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that the technical solutions of the present invention may be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, and such modifications or equivalents shall be encompassed by the claims of the present invention. Any techniques, shapes, and structures not described in detail herein are well known.

Claims

1. A device for cutting plastic outer packaging of cigarette stacks, comprising a cutting mechanism (11) and a feeding mechanism (12), characterized in that: A frame (2) is provided above the cutting mechanism (11), and auxiliary mechanisms (3) are provided at both ends of the frame (2). The auxiliary mechanism (3) comprises a driving assembly (4) and an auxiliary assembly (5). The auxiliary assembly (5) comprises a mounting frame (51), a friction roller (52) and a driving motor (53). The mounting frame (51) is slidably mounted on the frame (2) along the length direction of the frame (2). The driving assembly (4) is used to drive the mounting frame (51) to move. The friction roller (52) and the driving motor (53) are both mounted on the mounting frame (51). When the friction roller (52) is in close contact with the plastic outer packaging of the cigarette stack, the driving motor (53) drives the friction roller (52) to rotate, and the friction roller (52) lifts the excess plastic outer packaging on both sides of the plastic outer packaging of the cigarette stack upwards through friction.

2. A cigarette stack plastic outer packaging cutting device according to claim 1, characterized in that: The mounting frame (51) is rotatably connected to a movable frame (6), and the movable frame (6) is slidably mounted on the frame body (2) along the length direction of the frame body (2). The driving assembly (4) is transmission-connected to the movable frame (6). A mounting plate (511) is provided on the mounting frame (51), and first distance detection sensors (512) are provided on both ends of the mounting plate (511) on a side close to the cigarette stack. The first distance detection sensor (512) is used to detect the distance between the mounting plate (511) and the cigarette stack.

3. A cigarette stack plastic outer packaging cutting device according to claim 2, characterized in that: Both ends of the bottom of the movable frame (6) are provided with limit bars (61), and both ends of the top of the mounting frame (51) are provided with two limit blocks (513), and the two limit blocks (513) are respectively located on both sides of the limit bar (61). When the movable frame (6) and the mounting frame (51) rotate relative to each other, the limit bar (61) and the two limit blocks (513) limit the angle of relative rotation of the movable frame (6) and the mounting frame (51).

4. A device for cutting plastic outer packaging of cigarette stacks according to claim 1, characterized in that: A movable frame (7) is installed below the mounting frame (51), and the movable frame (7) is slidably connected to the mounting frame (51) along the height direction of the mounting frame (51). The friction roller (52) is rotatably installed on the movable frame (7), and the output shaft of the drive motor (53) is transmission-connected to the friction roller (52). An elastic member (71) is provided between the movable frame (7) and the mounting frame (51), and the elastic member (71) is used to make the movable frame (7) have a tendency to move toward the mounting frame (51). A second distance detection sensor (72) is provided between the movable frame (7) and the mounting frame (51), and the second distance detection sensor (72) is used to detect the distance between the movable frame (7) and the mounting frame (51).

5. A device for cutting plastic outer packaging of cigarette stacks according to claim 4, characterized in that: A mounting shaft (73) is rotatably provided on the movable frame (7), the friction roller (52) is fixedly sleeved on the mounting shaft (73), the drive motor (53) is fixedly mounted on one end of the movable frame (7), and the output shaft of the drive motor (53) is fixedly connected to the mounting shaft (73).

6. A device for cutting plastic outer packaging of cigarette stacks according to claim 4, characterized in that: A counterweight (74) is provided at one end of the movable frame (7) away from the driving motor (53).

7. A device for cutting plastic outer packaging of cigarette stacks according to claim 4, characterized in that: Both ends of the movable frame (7) are provided with connecting blocks (75), and both ends of the bottom of the mounting frame (51) are fixedly provided with connecting rods (514). A connecting groove (751) is provided on the connecting block (75), and a pressure plate (752) is fixedly connected to the top of the connecting groove (751) of the connecting block (75). The free end of the connecting rod (514) passes through the pressure plate (752) and is inserted into the connecting groove (751). A limiting ring (515) is provided at the free end of the connecting rod (514), and the limiting ring (515) is used to prevent the connecting rod (514) from separating from the pressure plate (752).

8. A device for cutting plastic outer packaging of cigarette stacks according to claim 7, characterized in that: The elastic member (71) is sleeved on the connecting rod (514), one end of the elastic member (71) abuts against the limiting ring (515), and the other end abuts against the pressing plate (752).

9. The device for cutting the plastic outer packaging of cigarette stacks according to claim 7, characterized in that: The second distance detection sensor (72) is fixedly arranged on the top of the pressing plate (752).

10. The device for cutting plastic outer packaging of cigarette stacks according to claim 4, characterized in that: A stopper (76) is provided on the movable frame (7) in a direction away from the cigarette stack, and the lower surface of the stopper (76) is in contact with the friction roller (52).

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