Double-film compatible film passing mechanism

Abstract

The utility model discloses a double-film compatible film passing mechanism which comprises a machine frame, and a film installing shaft, a driving device, a film pulling roller, an eccentric roller, a tensioning roller, a colored tape coding device, a punching device and a film guiding roller are arranged on the machine frame. The film roll is mounted on the film mounting shaft, and the driving device drives the film pulling roller to rotate to pull the film roll, so that a film material is actively released; a film material sequentially passes through the eccentric roller, the tensioning roller, the colored tape coding device and the punching device, the colored tape coding device can conduct coding operation on the film, the punching device can punch the film according to needs, and finally the film material is conveyed to the next procedure through the film guide roller. When the film passes through the eccentric roller, the eccentric shaft can be adjusted by rotating the handle, the position of the roller is changed, and the tension of the film is adjusted so as to adapt to different types of films. The device disclosed by the utility model is compact in overall structure, convenient to operate, flexible to adjust and strong in compatibility and functionality to membrane materials.

Description

TECHNICAL FIELD

[0001] The utility model relates to packaging technical field more specifically, especially, a kind of double-membrane compatible membrane passing mechanism is more particularly related to. BACKGROUND

[0002] The film roll of conventional packaging machine is mostly passive film unwinding, and the unwinding speed of film roll depends on the traction speed of packaging machine. When the running speed of packaging machine changes, the unwinding speed cannot be adjusted in time due to inertia and the characteristics of passive film unwinding, resulting in large fluctuations in film tension and affecting the packaging quality. In addition, the function of the conventional film unwinding mechanism is relatively single, and the compatibility of the film is poor. SUMMARY

[0003] The utility model provides a kind of double-membrane compatible membrane passing mechanism to solve the problems raised in the above background technology. To achieve the above purpose, the utility model provides the following technical scheme: a kind of double-membrane compatible membrane passing mechanism, including rack, the rack is equipped with film mounting shaft, drive device, membrane pulling roller, eccentric roller, tension roller, ribbon coding device, punching device and membrane guide roller;The film mounting shaft is used to install film roll, and the drive device is connected with the membrane pulling roller;The eccentric roller includes eccentric shaft, and the eccentric shaft is equipped with rotatable roller, and the roller is equipped with rubber sleeve;The both ends of the eccentric shaft are respectively equipped with connecting shaft head, and the connecting shaft head is rotatably connected with the rack, and the end of one connecting shaft head is equipped with handle.

[0004] Preferably, the ribbon coding device includes a first roller, a fixed frame, a coding machine and a second roller, the first roller and the second roller are used to guide the film material through the fixed frame;The fixed frame includes a pair of side plates, a first horizontal bar, a backing plate, a second horizontal bar and a horizontal plate arranged between the pair of side plates, the first horizontal bar, the backing plate and the second horizontal bar are used to support the film material respectively;The coding machine is arranged on the horizontal plate and cooperates with the film material.

[0005] Preferably, the both ends of the second roller are respectively equipped with a first support plate, the first support plate is equipped with a first slot, and the first slot is provided with a bolt and connected with the rack through the bolt.

[0006] Preferably, the punching device includes a third roller, a cross beam, a backing plate, a color mark electric eye, a punch and a fourth roller, the cross beam is connected with the rack, the cross beam is equipped with an electric eye fixing block and a punching fixing block, the color mark electric eye is arranged on the electric eye fixing block, and the punch is arranged on the punching fixing block;The backing plate is connected with the rack, and the both sides of the backing plate are respectively equipped with a guide slope surface for facilitating the film material to pass through, the backing plate is equipped with a punching slot, and the punching slot is arranged in cooperation with the punch.

[0007] Preferably, the tensioning roller is slidingly connected between the frame, and two sides of the frame are respectively provided with vertical sliding grooves matched with the tensioning roller, and two ends of the tensioning roller are respectively inserted into the vertical sliding grooves on the two sides.

[0008] Preferably, a first photoelectric eye and a second photoelectric eye for monitoring the position of the tensioning roller are arranged on one side surface of the frame, and the first photoelectric eye and the second photoelectric eye are sequentially arranged along the length direction of the vertical sliding groove.

[0009] Preferably, an axle seat is arranged on the frame, and the film mounting shaft is rotatably arranged on the axle seat; a brake wheel is arranged on the end of the film mounting shaft, and a brake pad matched with the brake wheel is arranged on the frame.

[0010] Preferably, the driving device comprises a motor frame, a variable speed motor, a motor wheel, a belt and a transmission wheel; the film pulling roller is rotatably arranged on the frame, the transmission wheel is arranged on the film pulling roller, the variable speed motor is connected with the frame through the motor frame, the motor wheel is arranged on the output shaft of the variable speed motor, and the motor wheel and the transmission wheel are drivingly connected through the belt.

[0011] Preferably, the two ends of the film guide roller are respectively provided with second support plates, the second support plates are provided with second strip-shaped grooves, and the second strip-shaped grooves are provided with screw rods and connected with the frame through the screw rods.

[0012] Preferably, a detection frame is arranged on the frame, and a sensor is arranged on the detection frame, the sensor is arranged in cooperation with the film mounting shaft, and is used for detecting the thickness of the film roll on the film mounting shaft.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the film roll is mounted on the film mounting shaft, the driving device drives the film pulling roller to rotate to pull the film roll, and the film material is actively released; the film material sequentially passes through the eccentric roller, the tensioning roller, the color band coding device and the punching device, the color band coding device can code the film, the punching device can punch the film as needed, and finally the film is conveyed to the next process through the film guide roller. When passing through the eccentric roller, the rotating handle can adjust the eccentric shaft, change the position of the roller, adjust the tension of the film material, and adapt to different types of films. The utility model has the advantages of compact overall structure, convenient operation, flexible adjustment, strong compatibility of the film material, active release, coding and punching functions, and further provided with a brake wheel to realize intermittent conveying of the film material. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural view of the double-film compatible film passing mechanism of the utility model embodiment.

[0015] Figure 2Another perspective view of the double-membrane compatible membrane passing mechanism of the embodiment of the present application;

[0016] Figure 3 A side view of the double-membrane compatible membrane passing mechanism of the embodiment of the present application;

[0017] Figure 4 A top view of the double-membrane compatible membrane passing mechanism of the embodiment of the present application;

[0018] Figure 5 A cross-sectional view of the double-membrane compatible membrane passing mechanism of the embodiment of the present application;

[0019] In Figures 1 to 5 The correspondence between the names of the components and the figure numbers is as follows:

[0020] 1 - frame, 11 - vertical sliding slot, 12 - first photoelectric eye, 13 - second photoelectric eye, 14 - shaft seat, 15 - brake wheel, 2 - film loading shaft, 3 - driving device, 31 - motor frame, 32 - variable speed motor, 33 - motor wheel, 34 - belt, 35 - transmission wheel, 4 - film pulling roller, 5 - eccentric roller, 51 - eccentric shaft, 52 - roller, 53 - rubber sleeve, 54 - connecting shaft head, 55 - handle, 6 - tensioning roller, 7 - color band coding device, 71 - first roller, 72 - fixed frame, 721 - side plate, 722 - first cross rod, 723 - pad plate, 724 - second cross rod, 725 - cross plate, 726 - first support plate, 7261 - first slot, 73 - coding machine, 74 - second roller, 8 - punching device, 81 - third roller, 82 - cross beam, 83 - supporting plate, 84 - color mark photoelectric eye, 85 - fourth roller, 86 - photoelectric eye fixing block, 87 - punching fixing block, 831 - guide slope, 9 - film guide roller, 91 - second support plate, 911 - second slot. DETAILED DESCRIPTION

[0021] The embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples, and the accompanying drawings are only used for reference and do not limit the embodiments of the present application. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0022] In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two;The terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the utility model, it is necessary to point out that, unless otherwise specified and limited, the terms "connected", "connected" should be broadly understood, for example, it can be fixedly connected, can be detachably connected, or integrally connected;It can be mechanically connected, or electrically connected;It can be directly connected, or indirectly connected through an intermediate medium. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] Please refer to Figures 1 to 5 The utility model provides a kind of double-membrane compatible membrane passing mechanism, including rack 1, the rack 1 is equipped with membrane loading shaft 2, driving device 3, membrane pulling roller 4, eccentric roller 5, tension roller 6, ribbon coding device 7, punching device 8 and membrane guide roller 9;The membrane loading shaft 2 is used to install membrane roll, the driving device 3 is transmissionally connected with the membrane pulling roller 4;The eccentric roller 5 includes eccentric shaft 51, the eccentric shaft 51 is equipped with rotatable roller 52, the roller 52 is equipped with rubber sleeve 53;The both ends of the eccentric shaft 51 are equipped with connecting shaft head 54, the connecting shaft head 54 is rotatably connected with the rack 1, and the end of one connecting shaft head 54 is equipped with handle 55.

[0025] In the embodiment of the utility model, the film roll is installed on the film loading shaft 2, and the film material is provided for the film passing work. The driving device 3 and the film pulling roller 4 are in transmission connection, and when the driving device 3 is started, the film pulling roller 4 can be driven to rotate. The film pulling roller 4 pulls the film material from the film roll through the friction between the film material and the film pulling roller 4, and moves the film material along the set path. In order to make the film material better adhere to the film pulling roller 4, the eccentric roller 5 is arranged in the embodiment, the rubber sleeve 53 on the eccentric roller 5 is used to push the film material to the film pulling roller 4, so as to improve the film pulling effect. Specifically, the handle 55 is rotated according to the different types of film materials, the handle 55 acts on the connecting shaft head 54, and the connecting shaft head 54 drives the eccentric shaft 51 to move. Due to the eccentric structure of the eccentric shaft 51, the position of the roller cylinder 52 changes, so that the position of the rubber sleeve 53 changes synchronously, the rubber sleeve 53 can increase the friction with the film, and the film can stably contact the eccentric roller 5 during the movement, so as to realize the adjustment of the tension of the film material and the film passing path. The tensioning roller 6 adjusts the position according to the tension of the film material, so that the film material maintains appropriate tension during the operation, prevents the film from being loose or over-tensioned, and ensures the stable conveying of the film material. When the film material moves from the tensioning roller 6 to the color band coding device 7, the color band coding device 7 works, prints the required information on the film material through the color band, and realizes the coding identification of the film material. The film material continues to move to the punching device 8, and the punching device 8 punches the film material according to the preset requirements, and completes the punching processing of the film material. Finally, the film guide roller 9 guides the film material to move to the next process.

[0026] Through the above structure, the handle 55 and the connecting shaft head 54 are used to rotate the eccentric shaft 51, the distance between the roller cylinder 52 and the film pulling roller 4 can be changed. The roller cylinder 52 with the rubber sleeve 53 can increase the friction with the film material, the film pulling roller 4 can better convey the film material when passing the film, and the position of the eccentric roller 5 can be adjusted through the handle 55 according to the thickness, material and other characteristics of different film materials, so as to provide appropriate pressure, ensure that the film material does not slip or wrinkle during the conveying process, and is especially suitable for the preservation film and the composite film used on the food packaging machine. The utility model has good compatibility for the film material, especially can adapt to the preservation film and the composite film of the two food packaging films, can meet the packaging requirements of different materials and specifications of different products, and reduces the repeated purchase cost of the equipment.

[0027] The working process of the embodiment is as follows: the film roll is installed on the film loading shaft 2, the driving device 3 drives the film pulling roller 4 to rotate to pull the film roll, the eccentric shaft 51 makes the film material adhere to the film pulling roller 4, the tensioning roller 6 enhances the tension of the film material, the film material passes through the color band coding device 7 and the punching device 8 in turn, the color band coding device 7 can code the film, the punching device 8 can punch the film as required, and finally the film is conveyed to the next process through the film guide roller 9.

[0028] Preferably, the color band coding device 7 comprises a first roller 7152, a fixed frame 72, a coding machine 73 and a second roller 7452, the first roller 7152 and the second roller 7452 are used to guide the film material through the fixed frame 72; the fixed frame 72 comprises a pair of side plates 721, and a first cross bar 722, a pad plate 723, a second cross bar 724 and a cross plate 725 arranged between the pair of side plates 721, the first cross bar 722, the pad plate 723 and the second cross bar 724 are used to support the film material respectively; the coding machine 73 is arranged on the cross plate 725 and is matched with the film material.

[0029] In the embodiment, the first roller 7152 and the second roller 7452 adopt a front-and-back structure, which can accurately guide the film material through the fixed frame 72, and the first cross bar 722, the pad plate 723 and the second cross bar 724 in the fixed frame 72 are used to support the film material respectively, so as to support the film material from multiple positions and keep the film material flat and stable during coding. The coding machine 73 is arranged on the cross plate 725 and is matched with the film material, further, the coding machine 73 is connected with the cross plate 725 through a sliding block, the sliding block is slidingly connected with the cross plate 725 and can be locked, so that the position of the coding machine 73 can be adjusted in the length direction of the cross plate 725 to adapt to the punching requirements of different film materials, thereby improving the flexibility and adaptability of the coding device.

[0030] Preferably, the two ends of the second roller 7452 are respectively provided with a first support plate 726, the first support plate 726 is provided with a first slot 7261, and the first slot 7261 is provided with a bolt and connected with the rack 1 through the bolt. In the embodiment, the first support plate 726 is provided with the first slot 7261, and is connected with the rack 1 through the bolt, so that the position of the second roller 7452 can be adjusted along the direction of the slot and rotated around the bolt as the center. In actual use, the position of the second roller 7452 can be flexibly changed according to the characteristics of different film materials, the speed of the film material passing through and other process requirements, so as to optimize the conveying path and tension of the film material, ensure that the film material can keep the best state when passing through the color band coding device 7, and improve the accuracy and stability of coding.

[0031] Preferably, the punching device 8 comprises a third roller 8152, a crossbeam 82, a supporting plate 83, a color mark electric eye 84, a puncher and a fourth roller 8552, the crossbeam 82 is connected with the frame 1, the crossbeam 82 is provided with an electric eye fixing block 86 and a punch fixing block 87, the color mark electric eye 84 is arranged on the electric eye fixing block 86, and the puncher is arranged on the punch fixing block 87; the supporting plate 83 is connected with the frame 1, and is provided with guiding slopes 831 on both sides for facilitating the film material to pass through, the supporting plate 83 is provided with a punching groove, and the punching groove is arranged in cooperation with the puncher. In the embodiment, the third roller 8152 and the fourth roller 8552 are used to guide the film material to pass through the supporting plate 83, the color mark electric eye 84 is installed on the electric eye fixing block 86 and is used to identify the color mark on the film material. During the film material conveying process, the color mark electric eye 84 can determine the punching position according to a preset color mark signal. When a specific color mark is detected, a signal is sent to the puncher in time, so that the puncher can perform the punching operation at the correct position, the punching accuracy is greatly improved, and the requirement for the punching position accuracy in production is met. The supporting plate 83 is used to support the film material and is provided with the punching groove in cooperation with the puncher, during the punching process, the end surface of the supporting plate 83 drags the film material, the punch of the puncher falls into the punching groove, and stable punching is realized.

[0032] Preferably, the tensioning roller 6 is in sliding connection with the frame 1, the frame 1 is provided with vertical sliding grooves 11 on both sides in cooperation with the tensioning roller 6, and both ends of the tensioning roller 6 are inserted into the vertical sliding grooves 11 on both sides. In the embodiment, since the tensioning roller 6 is in sliding connection with the frame 1 and is inserted into the vertical sliding grooves 11, when the film material tension changes during the conveying process, the tensioning roller 6 can automatically slide up and down in the vertical sliding grooves 11 under the action of the weight. If the film material tension increases, the tensioning roller 6 slides upward to increase the relaxation length of the film material, so as to reduce the tension; conversely, when the film material tension decreases, the tensioning roller 6 slides downward to tighten the film material, so as to increase the tension. The automatic adjustment function can keep the film material in a suitable tension state at all times, ensures the smooth progress of subsequent processes such as film passing, code printing and punching, and improves the product quality.

[0033] Preferably, a first photoelectric sensor 12 and a second photoelectric sensor 13 for monitoring the position of the tension roller 6 are provided on one side of the frame 1. The first photoelectric sensor 12 and the second photoelectric sensor 13 are arranged sequentially along the length of the vertical slide groove 11. In this embodiment, by arranging two photoelectric sensors along the length of the vertical slide groove 11, the photoelectric sensors detect the end of the tension roller 6. When the end of the tension roller 6 passes the detection end of the photoelectric sensor, the photoelectric sensor can capture its position information. With the above structural arrangement, the position of the tension roller 6 in the slide groove can be accurately monitored. By sensing the position change of the tension roller 6, the tension status information of the membrane material can be obtained in real time. For example, when the tension roller 6 is close to the first photoelectric sensor 12, it may indicate that the membrane material tension is too low and needs to be tightened appropriately; when the tension roller 6 is close to the second photoelectric sensor 13, it may mean that the membrane material tension is too high and needs to be relaxed. This accurate monitoring helps to adjust the membrane material tension in a timely manner, ensuring that the membrane material is processed under appropriate tension and improving the stability of product quality.

[0034] Preferably, the frame 1 is provided with a bearing seat 14, and the film loading shaft 2 is rotatably mounted on the bearing seat 14; a brake wheel 15 is sleeved on the end of the film loading shaft 2, and a brake pad that cooperates with the brake wheel 15 is provided on the frame 1. In this embodiment, the film loading shaft 2 is rotatably mounted on the bearing seat 14, which ensures that the film loading shaft 2 rotates flexibly to achieve smooth film feeding. The cooperation between the brake wheel 15 and the brake pad can effectively control the rotation of the film loading shaft 2. When braking is required, an external force is applied to the brake pad, such as a cylinder, hydraulic cylinder, or motor, causing the brake pad to approach and press against the surface of the brake wheel 15. Since the brake wheel 15 rotates synchronously with the film loading shaft 2, friction is generated between the brake pad and the brake wheel 15. This friction hinders the rotation of the brake wheel 15, thereby stopping the rotation of the film loading shaft 2. When the braking force disappears, the brake pad returns to its initial position, releasing the braking state. With the above-mentioned structural design, the friction between the brake pads and the brake wheel 15 can quickly and accurately stop the film loading shaft 2 from rotating, avoiding waste or impact on subsequent processing steps caused by the film material continuing to be released due to inertia.

[0035] Preferably, the driving device 3 includes a motor frame 311, a variable speed motor 32, a motor wheel 33, a belt 34, and a transmission wheel 35; the film-pulling roller 4 is rotatably mounted on the frame 1, and the transmission wheel 35 is sleeved on the film-pulling roller 4; the variable speed motor 32 is connected to the frame 1 through the motor frame 311, the motor wheel 33 is mounted on the output shaft of the variable speed motor 32, and the motor wheel 33 and the transmission wheel 35 are connected by the belt 34. This embodiment uses a variable speed motor 32 as the power source, which allows for convenient and precise adjustment of the motor speed according to different film material types, processing requirements, and production speed demands, thereby changing the rotational speed of the film-pulling roller 4. Furthermore, using a belt 34 to connect the motor wheel 33 and the transmission wheel 35 to drive the film-pulling roller 4 ensures smooth power transmission. Simultaneously, the belt 34 transmission provides overload protection to a certain extent. When the film-pulling roller 4 encounters significant resistance or becomes clogged, resulting in excessive load, the belt 34 will slip between the motor pulley 33 and the transmission pulley 35. This prevents the motor from burning out due to overload and also prevents components such as the film-pulling roller 4 from being damaged by excessive torque, thus protecting the equipment.

[0036] Preferably, the guide roller 9 has a second support plate 91 at each end, and a second slot 911 on the second support plate 91. A screw is installed on the second slot 911 and connected to the frame 1 through the screw. With the above structural arrangement, the operator can flexibly change the position of the guide roller 9 according to the specific film material characteristics and production process requirements, thereby optimizing the guiding path of the film material.

[0037] Preferably, the frame 1 is equipped with a detection frame, and the detection frame is equipped with a sensor. The sensor is configured to cooperate with the film loading shaft 2 and is used to detect the thickness of the film roll on the film loading shaft 2. During the use of the film roll, as the film material is continuously released, the thickness of the film roll gradually decreases. In this embodiment, the sensor monitors the thickness of the film roll on the film loading shaft 2 in real time, allowing operators to know the remaining amount of film roll at any time and replace it in a timely manner, thereby improving the continuity and efficiency of production. In this embodiment, the sensor can be a laser sensor or an ultrasonic sensor.

[0038] Compared with existing technologies, the advantages of this invention are as follows: This invention mounts the film roll on a film loading shaft, and a drive device rotates the film pulling roller to pull the film roll, thus achieving active release of the film material. The film material sequentially passes through an eccentric roller, a tension roller, a color ribbon coding device, and a perforation device. The color ribbon coding device can code the film, and the perforation device can perforate the film as needed. Finally, it is conveyed to the next process by a guide roller. When passing through the eccentric roller, the eccentric shaft can be adjusted by rotating the handle to change the roller position and adjust the film tension to adapt to different types of film. This invention has a compact overall structure, is easy to operate, can be flexibly adjusted, has strong compatibility with film materials, and can achieve active release, coding, and perforation functions. In addition, a brake wheel is provided to achieve intermittent conveying of the film material through rapid braking.

[0039] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A dual-membrane compatible membrane-passing mechanism, characterized by, The application relates to a film cutting device, which comprises a frame (1), a film loading shaft (2), a driving device (3), a film pulling roller (4), an eccentric roller (5), a tensioning roller (6), a color band coding device (7), a punching device (8) and a film guiding roller (9) arranged on the frame; the film loading shaft is used for loading a film roll; the driving device is in transmission connection with the film pulling roller; the eccentric roller comprises an eccentric shaft (51), a rotatable roller (52) arranged on the eccentric shaft, and a rubber sleeve (53) arranged on the roller; the two ends of the eccentric shaft are respectively provided with connecting shaft heads (54) which are in rotatable connection with the frame; and the end of one of the connecting shaft heads is provided with a handle (55).

2. The dual-membrane compatible membrane crossing mechanism of claim 1, wherein, The color band coding device comprises a first roller (71), a fixing frame (72), a coding machine (73) and a second roller (74); the first roller and the second roller are used for guiding a film to pass through the fixing frame; the fixing frame comprises a pair of side plates (721), a first horizontal rod (722), a cushion plate (723), a second horizontal rod (724) and a horizontal plate (725) arranged between the pair of side plates; the first horizontal rod, the cushion plate and the second horizontal rod are respectively used for supporting the film; and the coding machine is arranged on the horizontal plate and is matched with the film.

3. The dual-membrane compatible membrane crossing mechanism of claim 2, wherein, The two ends of the second roller are respectively provided with first support plates (726) which are provided with first strip-shaped grooves (7261); and the first strip-shaped grooves are provided with bolts and are connected with the frame through the bolts.

4. The dual-membrane compatible membrane crossing mechanism of claim 1, wherein, The punching device comprises a third roller (81), a horizontal beam (82), a supporting plate (83), a color mark electric eye (84), a punching machine and a fourth roller (85); the horizontal beam is connected with the frame; the horizontal beam is provided with an electric eye fixing block (86) and a punching fixing block (87); the color mark electric eye is arranged on the electric eye fixing block; the punching machine is arranged on the punching fixing block; the supporting plate is connected with the frame; the two sides of the supporting plate are respectively provided with guide inclined surfaces (831) for facilitating the film to pass through; and the supporting plate is provided with a punching groove which is matched with the punching machine.

5. The dual-membrane compatible membrane crossing mechanism of claim 1, wherein, The tensioning roller is in sliding connection with the frame; the two sides of the frame are respectively provided with vertical sliding grooves (11) matched with the tensioning roller; and the two ends of the tensioning roller are respectively inserted into the vertical sliding grooves on the two sides.

6. The dual-membrane compatible membrane crossing mechanism of claim 5, wherein, A first photoelectric eye (12) and a second photoelectric eye (13) for monitoring the position of the tensioning roller are arranged on one side surface of the frame; and the first photoelectric eye and the second photoelectric eye are sequentially arranged along the length direction of the vertical sliding groove.

7. The dual-membrane compatible membrane crossing mechanism of claim 1, wherein, An axle seat (14) is arranged on the frame; and the film loading shaft is rotatably arranged on the axle seat; a brake wheel (15) is arranged on the end of the film loading shaft; and the frame is provided with a brake pad matched with the brake wheel.

8. The dual-membrane compatible membrane crossing mechanism of claim 1, wherein, The driving device comprises a motor frame (31), a variable speed motor (32), a motor wheel (33), a belt (34) and a transmission wheel (35); the film pulling roller is rotatably arranged on the frame, the transmission wheel is sleeved on the film pulling roller; the variable speed motor is connected with the frame through the motor frame, the motor wheel is arranged on the output shaft of the variable speed motor, and the motor wheel and the transmission wheel are drivingly connected through the belt.

9. The dual-membrane compatible membrane crossing mechanism of claim 1, wherein, Both ends of the film guide roller are respectively provided with a second support plate (91), a second slot (911) is arranged on the second support plate, a screw rod is arranged on the second slot, and the second support plate is connected with the frame through the screw rod.

10. The dual-membrane compatible membrane crossing mechanism of any of claims 1-9, wherein, A detection frame is arranged on the frame, a sensor is arranged on the detection frame, the sensor is arranged in cooperation with the film loading shaft, and the sensor is used for detecting the thickness of the film roll on the film loading shaft.

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