A film placing device

Abstract

The application discloses a film placing device and relates to the technical field of automation equipment. The film placing device comprises a first film placing mechanism, a second film placing mechanism, a fixed roller group and a lifting roller group. The fixed roller group is arranged downstream of the first film placing mechanism and is used for receiving a film body placed by the first film placing mechanism. The lifting roller group is located below the fixed roller group and cooperates with the fixed roller group to guide the film body together, so that the film body is output to the downstream after winding around the two groups for multiple times in a dynamic detour path. The lifting roller group is configured to release the film body collected in the dynamic detour path when the film body is pulled by the downstream to drive the lifting roller group to overcome gravity and ascend, and to collect the film body released by the upstream in the dynamic detour path when the lifting roller group is affected by gravity and descends after the film body is released by the upstream. The application can effectively adapt to the speed fluctuation between the film placing speed of the upstream and the pulling speed of the downstream and avoid the relaxation or breakage of the film body.

Description

Technical Field

[0001] This application relates to the field of automated equipment technology, and more specifically to a film dispensing device. Background Technology

[0002] In the product packaging process, film sheets are often required. In existing technology, film dispensing devices typically include a film dispensing mechanism. The film dispensing mechanism is used to release the film sheet, while the downstream of the film dispensing mechanism is responsible for pulling the film sheet.

[0003] However, in actual production, it is difficult to maintain a consistent pulling speed between the downstream diaphragm body and the upstream release speed. When the downstream pulling speed is less than the upstream release speed, the diaphragm body may become loose, stacked, or even wrinkled, severely affecting the lamination quality. Conversely, when the downstream pulling speed is greater than the upstream release speed, the diaphragm body tension may increase sharply, posing a risk of breakage. Existing film release devices lack effective buffering and compensation mechanisms, making it difficult to adapt to speed fluctuations between the upstream release speed and the downstream pulling speed, thus hindering further improvements in production efficiency and product quality.

[0004] Therefore, how to provide a film-laying device that can effectively adapt to the speed fluctuations between the upstream film-laying speed and the downstream traction speed, and avoid the loosening or breakage of the film body, remains a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, in order to solve the above-mentioned technical problems, this application provides a film-laying device, which includes: The first membrane deployment mechanism is used to deploy the membrane body; A fixed roller group is located downstream of the first film feeding mechanism and is used to receive the film body; And the lifting roller group, located below the fixed roller group, cooperates with the fixed roller group to guide the diaphragm body, so that the diaphragm body passes around the two multiple times in a dynamic tortuous path before being output to the downstream. The lifting roller assembly is configured to: release the membrane body collected in the dynamic detour path when the downstream traction membrane body drives the lifting roller assembly to rise against gravity; and collect the membrane body released upstream in the dynamic detour path when the upstream release of the membrane body causes the lifting roller assembly to fall under the influence of gravity.

[0006] Beneficial Effects: Unlike existing technologies, this application utilizes the passive overcoming of gravity-induced ascent and descent by the lifting roller assembly to automatically compensate for speed fluctuations between the upstream film-laying speed and the downstream traction speed. When the downstream traction speed exceeds the film-laying speed of the upstream first film-laying mechanism, the tension of the film body drives the lifting roller assembly to overcome gravity and rise, causing the dynamic meandering path to contract vertically to release the film body collected by the dynamic meandering path. This promptly compensates for the downstream demand for the film body, thus preventing film body breakage. When the film-laying speed of the upstream first film-laying mechanism exceeds the downstream traction speed, the gravity of the lifting roller assembly causes it to descend adaptively to gravity, lengthening the dynamic meandering path vertically. This allows the dynamic meandering path to collect excess film body, preventing film body slack. Thus, this application effectively adapts to speed fluctuations between the upstream film-laying speed and the downstream traction speed, preventing film body slackness or breakage. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the conveying membrane body of the membrane dispensing device of this application; Figure 2 This is a schematic diagram of the film-laying device of this application used to attach a tear-off aid film to the film body, wherein some structures of the fixed roller group, the lifting roller group, and the output roller group are hidden. Figure 3 This is a schematic diagram from another perspective of the assembly structure of the fixed roller group, lifting roller group, output roller group and tearing structure forming device of the film feeding device of this application; Figure 4 This is a schematic diagram of a portion of the structure of the film-dispensing device of this application; Figure 5 This is an enlarged schematic diagram of the tear-resistant membrane forming the tear structure area on the diaphragm body. The dashed line indicates the boundary of the enlarged area.

[0008] Explanation of reference numerals in the attached figures: 10-Film unloading device; 100-Device frame; 101-First position; 102-Second position; 200-First film unloading mechanism; 201-Film body; Dynamic detour path 202; 210-First unwinding drive device; 220-First unwinding shaft; 300-Second film unloading mechanism; 301-Tearing aid film; 302-Tearing structure; 310-Second unwinding shaft; 320-Damping device; 330-Tearing aid film guide wheel assembly; 331-Guide wheel; 340-Tearing aid film pressure roller; 350-Adapter frame; 400-Fixed Fixed roller group; 410-First guide roller; 500-Lifting roller group; 510-Lifting frame; 520-Second guide roller; 610-First positioning sensor; 620-Second positioning sensor; 630-Guide rail; 640-Slider; 700-Controller; 800-Output roller group; 810-First pressing roller group; 811-First pressing roller; 820-Support roller group; 821-Support roller; 830-Second pressing roller group; 831-Second pressing roller; 900-Tearing structure forming device; 20-Film pulling actuator. Detailed Implementation

[0009] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0010] Please see Figures 1 to 3 The film feeding device 10 includes a device frame 100, a first film feeding mechanism 200, a second film feeding mechanism 300, a fixed roller group 400, and a lifting roller group 500.

[0011] The first film-dispensing mechanism 200 is used to dispense the film body 201. A fixed roller group 400 is located downstream of the first film-dispensing mechanism 200 and is used to receive the film body 201. A lifting roller group 500 is located below the fixed roller group 400 and cooperates with it to guide the film body 201, causing it to pass through both groups multiple times via a dynamic detour path 202 before being output downstream. An output roller group 800 is located downstream of the dynamic detour path 202 and is used to guide and output the film body 201.

[0012] The lifting roller group 500 is configured to: be driven upward by the membrane body 201 to release the membrane body 201 collected by the dynamic detour path 202 when the membrane body 201 is pulled downstream and the membrane body 201 is stopped being released upstream; and be lowered by gravity when the membrane body 201 is released upstream and the membrane body 201 is stopped being pulled downstream so that the dynamic detour path 202 collects the membrane body 201 released upstream.

[0013] By utilizing the characteristics of the lifting roller assembly 500—passively overcoming gravity's upward movement and being affected by gravity's downward movement—speed fluctuations between the upstream film-laying speed and the downstream traction speed can be automatically compensated. When the downstream traction speed is greater than the film-laying speed of the upstream first film-laying mechanism 200, the tension of the film body 201 can drive the lifting roller assembly 500 to overcome gravity and rise, causing the dynamic meandering path 202 to contract vertically so that the film body 201 collected by the dynamic meandering path 202 can be released. This timely compensation of the downstream demand for the film body 201 prevents the film body 201 from breaking. When the film-laying speed of the upstream first film-laying mechanism 200 is greater than the downstream traction speed, the gravity of the lifting roller assembly 500 will cause it to descend adaptively to gravity, causing the dynamic meandering path 202 to lengthen vertically so that it can collect excess film body 201, thus preventing the film body 201 from slack. Thus, this application can effectively adapt to speed fluctuations between the upstream film release speed and the downstream traction speed, and avoid the membrane body 201 from loosening or breaking.

[0014] Optionally, such as Figures 1-4 As shown, the lifting roller group 500 can move up and down between a first position 101 and a second position 102, with the first position 101 being closer to the fixed roller group than the second position 102. The film feeding device 10 may also include a first positioning sensor 610, a second positioning sensor 620, and a controller 700.

[0015] The first positioning sensor 610 is configured corresponding to the first position 101 of the lifting roller assembly 500, and is used to issue a first positioning signal when the lifting roller assembly 500 reaches the first position 101. The second positioning sensor 620 is configured corresponding to the second position 102 of the lifting roller assembly 500, and is used to issue a second positioning signal when the lifting roller assembly 500 reaches the second position 102. The controller 700 is connected to the first positioning sensor 610, the second positioning sensor 620, and the first film feeding mechanism 200.

[0016] The controller 700 is configured to: receive a first positioning signal and, in response to this, control the first film dispensing mechanism 200 to dispense the film body 201; and receive a second positioning signal and, in response to this, control the first film dispensing mechanism 200 to stop dispensing the film body 201.

[0017] In this way, the first positioning sensor 610 detects when the lifting roller group 500 reaches the first position 101 and sends a first positioning signal, which can promptly trigger the controller 700 to control the first film feeding mechanism 200 to feed the film body 201, thus preventing the film body 201 from being overstretched. Similarly, the second positioning sensor 620 detects when the lifting roller group 500 reaches the second position 102 and sends a second positioning signal, which can promptly trigger the controller 700 to control the first film feeding mechanism 200 to stop feeding the film body 201, thus preventing the film body 201 from accumulating and loosening. In this way, through the coordinated control of the sensor signals and the controller 700, the first film feeding mechanism 200 can achieve more precise switching between feeding and stopping the film body 201, ensuring that the film body 201 maintains appropriate tension throughout the dynamic meandering path 202.

[0018] For example, and not as a limitation, the first position sensor 610 and the second position sensor 620 may be photoelectric sensors, but are not limited to this.

[0019] Optionally, such as Figures 1-4 As shown, the film-laying device 10 may include a film-pulling actuator 20, which may be located downstream of the dynamic detour path 202 and is used to pull the film body 201 output from the dynamic detour path 202. The controller 700 may be signal-connected to the first positioning sensor 610, the second positioning sensor 620, the first film-laying mechanism 200, and the film-pulling actuator 20, respectively.

[0020] The controller 700 can be configured to: receive a first positioning signal, and in response to this, control the first film-releasing mechanism 200 to release the film body 201 and control the film-pulling actuator 20 to stop pulling the film body 201; and receive a second positioning signal, and in response to this, control the first film-releasing mechanism 200 to stop releasing the film body 201 and control the film-pulling actuator 20 to pull the film body 201.

[0021] In this way, a more precise switching can be achieved between the first membrane-releasing mechanism 200 releasing the membrane body 201 and the membrane-pulling actuator 20 pulling the membrane body 201, ensuring that the membrane body 201 always maintains appropriate tension in the dynamic tortuous path 202.

[0022] Optionally, the film feeding device 10 may include a second film feeding mechanism 300. The first film feeding mechanism 200, the second film feeding mechanism 300, the fixed roller group 400 and the lifting roller group 500 are disposed on the device frame 100.

[0023] The second film-releasing mechanism 300 is used to release the tear-aid film 301. The fixed roller group 400 is used to receive the film body 201 and the tear-aid film 301 and to laminate them together when the film body 201 is pulled downstream.

[0024] The first positioning sensor 610 and the second positioning sensor 620 are disposed on the device frame 100. The lifting roller assembly 500 is movably disposed on the device frame 100 so that the lifting roller assembly 500 can move up and down between the first position 101 and the second position 102.

[0025] In this manner, when the film body 201 is pulled downstream, the film body 201 released by the first film feeding mechanism 200 and the tear-aid film 301 released by the second film feeding mechanism 300 are output to the fixed roller group 400, and the tear-aid film 301 output to the fixed roller group 400 adheres to the film body 201 output to the fixed roller group 400. Since the lifting roller group 500 is either rising or falling, the film body 201 in the dynamic detour path 202 is unlikely to be transported in reverse. Specifically, when the lifting roller group 500 rises, the dynamic detour path 202 releases the film body 201 downstream, making reverse transport unlikely. When the lifting roller group 500 falls, the dynamic detour path 202 collects the film body 201 released upstream, making reverse transport unlikely. Therefore, the tear-aid film 301 can adhere more accurately to the film body 201.

[0026] It should be noted that the width of the tear-aid film 301 can be shorter than the width of the membrane body 201, but is not limited to this. In other alternative examples, the width of the tear-aid film 301 can cover the entire width of the membrane body 201, but is not limited to this. For ease of explanation, the following description will use the example of the tear-aid film 301 being shorter than the width of the membrane body 201.

[0027] Optionally, such as Figures 1-4 As shown, the first unwinding mechanism 200 may include a first unwinding drive device 210 and a first unwinding shaft 220. The first unwinding shaft 220 is used to receive the wound film body 201, and the first unwinding drive device 210 is disposed on the device frame 100 and is connected to the first unwinding shaft 220 for driving the first unwinding shaft 220 to rotate to unwind the wound film body 201.

[0028] In the above manner, the first unwinding drive device can precisely control the unwinding length and speed of the diaphragm body 201 according to the instructions of the controller 700, and coordinate with the downstream pulling action to ensure the smooth unwinding of the diaphragm body 201.

[0029] Optionally, such as Figures 1-3 As shown, the second film unwinding mechanism 300 may include a second unwinding shaft 310, a damping device 320, a film tearing guide wheel assembly 330, and a film tearing pressure wheel 340.

[0030] The second unwinding shaft 310 is rotatably mounted on the device frame 100 for receiving the wound tear-aid film 301 and releasing the tear-aid film 301 during rotation. A damping device 320 is mounted on the device frame 100 and connected to the second unwinding shaft 310, providing damping to impede the rotation of the second unwinding shaft 310. A tear-aid film guide wheel assembly 330 is mounted on the device frame 100 for guiding the tear-aid film 301 released from the second unwinding shaft 310 to the fixed roller assembly 400. A tear-aid film pressure roller 340 is mounted on the device frame 100 and cooperates with the fixed roller assembly 400 to press the tear-aid film 301, guided by the tear-aid film guide wheel assembly 330 to the fixed roller assembly 400, onto the film body 201 that has passed through the fixed roller assembly 400.

[0031] The damping device 320 is configured such that when the tear-aiding film 301 is pulled by the downstream film body 201, the tear-aiding film 301 can drive the second unwinding shaft 310 to rotate against the damping provided by the damping device 320; and when the tear-aiding film 301 stops being pulled by the downstream film body 201, it hinders the rotation of the second unwinding shaft 310.

[0032] By utilizing the damping device 320 to provide appropriate resistance to the second unwinding shaft 310, the tear-aid film 301 can be ensured to be delivered smoothly without loosening when being pulled, and the film can be prevented from piling up due to inertia when pulling stops. Simultaneously, the precise guidance of the tear-aid film guide wheel assembly 330 and the coordinated pressing of the tear-aid film pressure roller 340 and the fixed roller assembly 400 ensure that the tear-aid film 301 is more accurately applied to the predetermined position on the film body 201, improving the application quality and positional accuracy.

[0033] For example, and not as a limitation, the second film unwinding mechanism 300 may include an adapter frame 350, which may be disposed on the device frame 100, and the second unwinding shaft 310 may be rotatably disposed on the adapter frame 350. The damping device 320 may be disposed on the adapter frame 350, and the film tearing aid guide wheel assembly 330 and the film tearing aid pressure roller 340 may be rotatably disposed on the adapter frame 350.

[0034] Optionally, the damping device 320 may be a magnetic powder brake, but is not limited thereto.

[0035] By utilizing the above method, the magnetic powder brake provides a linearly adjustable and rapidly responsive damping torque, which can precisely adjust the damping magnitude according to the material and width of the tear-aid film 301, ensuring that the tear-aid film 301 maintains appropriate tension during the pulling and stopping process, thereby improving the application quality and production efficiency.

[0036] Alternatively, in other alternative examples, the damping device 320 may be a mechanical friction brake, but is not limited thereto.

[0037] Optionally, such as Figures 1-3 As shown, the tear-aid film guide roller assembly 330 may include a plurality of guide rollers 331. The plurality of guide rollers 331 cooperate with each other to guide the tear-aid film 301 released from the second unwinding shaft 310, so as to guide the tear-aid film 301 to the fixed roller assembly 400.

[0038] Optionally, such as Figures 1-5 As shown, the film feeding device 10 may include an output roller group 800 and a tear-structure forming device 900. The output roller group 800 is disposed on the device frame 100 and downstream of the dynamic detour path 202, and is used to receive the film body 201 output from the dynamic detour path 202 and guide the film body 201 so that the film body 201 is output downstream. The tear-structure forming device 900 is disposed on the device frame 100 corresponding to the area where the output roller group 800 is located, and is used to form a tear-structure 302 on a portion of the tear-aid film 301 attached to the film body 201.

[0039] In the above manner, the output roller group 800 guides the film body 201 that has been applied, ensuring its smooth output to the downstream process; at the same time, the tear structure forming device 900 forms a tear structure 302 in a part of the tear aid film 301, providing users with a convenient tearing starting point, significantly improving the convenience of product use and user experience.

[0040] For example, and not limited to, the tear structure 302 may be, but is not limited to, a tear tongue, a tear opening, a tear line, or other structure that facilitates tearing the membrane body 201. For ease of illustration, as... Figure 5 As shown, the tear-off structure 302 is used as the tear-off tongue in this application.

[0041] Optionally, such as Figures 1-5 As shown, the output roller group 800 includes a first pressure roller group 810, a support roller group 820, and a second pressure roller group 830. The first pressure roller group 810 is disposed on the device frame 100 and below the fixed roller group 400, and is used to guide the membrane body 201 output from the dynamic detour path 202 to the downstream. The support roller group 820 is disposed on the device frame 100, downstream of and above the first pressure roller group 810, and is used to guide the membrane body 201 output from the first pressure roller group 810 to the downstream. The second pressure roller group 830 is disposed on the device frame 100, downstream of and below the support roller group 820, and is used to guide the membrane body 201 output from the support roller group 820 to the downstream.

[0042] The area where the film body 201, which is supported by the support roller group 820, is located in the tear-off structure forming device 900 is set in the device frame 100.

[0043] In this manner, the diaphragm body 201 is arranged in a bent path, bypassing the first pressure roller group 810, the support roller group 820, and the second pressure roller group 830. The support roller group 820 is located between and above the first and second pressure roller groups 810 and 830. Thus, the downward pressure exerted on the diaphragm body 201 by both the first and second pressure roller groups 810 and 830 allows the support roller group 820 to stretch and maintain tension on the corresponding position of the diaphragm body 201, providing a stable operating area for the tear structure forming apparatus 900. This helps to avoid or reduce the formation of wrinkles during the formation of the tear structure 302.

[0044] Optionally, such as Figures 1-3 As shown, the first pressing roller group 810 may include at least one first pressing roller 811, the support roller group 820 may include at least two support rollers 821, and the second pressing roller group 830 may include at least one second pressing roller 831, but is not limited thereto.

[0045] Optionally, such as Figures 1-3 As shown, the lifting roller assembly 500 includes a lifting frame 510 and at least one second guide roller 520. The lifting frame 510 and the device frame 100 form a sliding pair via a guide rail 630 and a slider 640, allowing it to be vertically and vertically mounted on the device frame 100. At least one second guide roller 520 is disposed on the lifting frame 510 and cooperates with the fixed roller assembly 400 to guide the diaphragm body 201, causing the diaphragm body 201 to pass through both multiple times via a dynamic meandering path 202 before being output downstream.

[0046] In this way, on the one hand, the cooperation between the guide rail 630 and the slider 640 ensures that the lifting frame 510 rises and falls more smoothly in the vertical direction, reducing shaking and jamming.

[0047] Optionally, the lifting roller assembly 500 may include at least two second guide rollers 520. Utilizing multiple second guide rollers 520 in this way can extend the path length of the dynamic detour path 202.

[0048] For example, and not as a limitation, the lifting roller assembly 500 may include at least one, two, three, or other second guide rollers 520. Figure 2 The diagram shows a fixed roller assembly 400 including two second guide rollers 520.

[0049] Optionally, such as Figures 1-3 As shown, the fixed roller group 400 includes at least two first guide rollers 410, which are disposed on the device frame 100. Viewed from above, the at least two first guide rollers 410 are arranged side by side at intervals in the horizontal direction.

[0050] At least two first guide rollers 410 sequentially receive the film body 201, and the film body 201 at one of the at least two first guide rollers 410 can be used to connect the tear-aid film 301 so that the two are bonded together when the film body 201 is pulled downstream. The lifting roller group 500 cooperates with the at least two first guide rollers 410 to guide the film body 201 together, so that the film body 201 passes around the two multiple times via a dynamic detour path 202 before being output downstream.

[0051] In this way, the path length of the dynamic detour path 202 can be extended by using multiple first guide rollers 410.

[0052] For example, and not as a limitation, the fixed roller group 400 includes two, three, five, or other no fewer than two first guide rollers 410. Figure 2 The diagram shows a fixed roller group 400 comprising three first guide rollers 410.

[0053] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A film-dispensing device, characterized in that, include: The first membrane deployment mechanism is used to deploy the membrane body; A fixed roller group is located downstream of the first film feeding mechanism and is used to receive the film body; And a lifting roller group, located below the fixed roller group, and cooperating with the fixed roller group to guide the diaphragm body together, so that the diaphragm body passes around both of them multiple times in a dynamic detour path before being output to the downstream. The lifting roller assembly is configured to: release the membrane body collected by the dynamic detour path when the downstream pulls the membrane body and drives the lifting roller assembly to rise against gravity; and to collect the membrane body released upstream when the upstream releases the membrane body and causes the lifting roller assembly to fall due to gravity.

2. The film-dispensing device according to claim 1, characterized in that, The lifting roller assembly moves up and down between a first position and a second position, wherein the first position is closer to the fixed roller assembly than the second position; the film feeding device includes: A first positioning sensor is provided corresponding to the first position and is used to send a first positioning signal when the lifting roller group reaches the first position. A second positioning sensor is provided corresponding to the second position and is used to send a second positioning signal when the lifting roller group reaches the second position. The controller, the first positioning sensor, the second positioning sensor, and the first film-dispensing mechanism are signal-connected to the controller; The controller is configured to: receive the first positioning signal and, in response, control the first film dispensing mechanism to dispense the film body; and receive the second positioning signal and, in response, control the first film dispensing mechanism to stop dispensing the film body.

3. The membrane dispensing device according to claim 2, characterized in that, The film feeding device includes a device frame and a second film feeding mechanism; the first film feeding mechanism, the second film feeding mechanism, the fixed roller group, and the lifting roller group are disposed on the device frame; The second film-releasing mechanism is used to release the tear-aiding film; the fixed roller group is used to receive the film body and the tear-aiding film and to bond the two together when the film body is pulled downstream; The first positioning sensor and the second positioning sensor are mounted on the device frame; the lifting roller assembly is mounted on the device frame in a liftable manner so that the lifting roller assembly can move up and down between the first position and the second position.

4. The film-dispensing device according to claim 3, characterized in that, The first film dispensing mechanism includes: A first unwinding drive device is mounted on the frame of the device; The first unwinding shaft is connected to the first unwinding drive device. The first unwinding shaft is used to receive the wound film body, and the first unwinding drive device is used to drive the first unwinding shaft to rotate so as to release the wound film body.

5. The film-dispensing device according to claim 3, characterized in that, The second film dispensing mechanism includes: The second unwinding shaft is rotatably mounted on the device frame and is used to receive the wound tear-aid film and release the tear-aid film when rotating. A damping device, disposed on the frame of the device and connected to the second unwinding shaft, is used to provide damping that prevents the second unwinding shaft from rotating; A tear-aid film guide wheel assembly is disposed on the device frame and is used to guide the tear-aid film released from the second unwinding shaft to the fixed roller assembly; A tear-aid film pressure roller is disposed on the frame of the device and cooperates with the fixed roller group to press the tear-aid film guided by the tear-aid film guide roller group onto the film body that has passed through the fixed roller group. The damping device is configured such that: when the tear-aiding film is pulled by the downstream film body, the tear-aiding film can drive the second unwinding shaft to rotate against the damping provided by the damping device; and when the tear-aiding film stops being pulled by the downstream film body, it hinders the rotation of the second unwinding shaft.

6. The film-dispensing apparatus according to claim 5, characterized in that, The damping device is a magnetic powder brake.

7. The film-dispensing device according to claim 3, characterized in that, The film dispensing device includes: An output roller assembly, disposed on the device frame and located downstream of the dynamic detour path, is used to receive the diaphragm body output from the dynamic detour path and guide the diaphragm body so that the diaphragm body is output downstream. And a tearing structure forming device, which is set on the device frame corresponding to the area where the output roller group is located, for forming a tearing structure in a portion of the tear-aid film attached to the film body.

8. The film-dispensing apparatus according to claim 7, characterized in that, The output roller group includes: The first pressure roller group is disposed on the device frame and located below the fixed roller group, and is used to guide the diaphragm body output by the dynamic detour path to output downstream; A support roller assembly is disposed on the frame of the device and located downstream and above the first pressure roller assembly, for guiding the film body output from the first pressure roller assembly to be output downstream; And a second pressure roller group, which is disposed on the device frame and located downstream and below the support roller group, for guiding the film body output by the support roller group to be output downstream; The tearing structure forming device is located on the frame of the device in the area where the film body is located, which is supported by the support roller group.

9. The film-dispensing device according to claim 3, characterized in that, The lifting roller assembly includes: The lifting frame is connected to the device frame via guide rails and sliders to form a sliding pair, and is mounted on the device frame in a height-adjustable manner. And at least one second guide roller, disposed on the lifting frame, for cooperating with the fixed roller group to jointly guide the diaphragm body, so that the diaphragm body passes around both of them multiple times in a dynamic detour path before being output to the downstream.

10. The film-dispensing device according to claim 3, characterized in that, The fixed roller group includes at least two first guide rollers, which are disposed on the device frame; viewed from above the at least two first guide rollers, the at least two first guide rollers are arranged side by side at intervals in the horizontal direction; In this process, at least two of the first guide rollers sequentially receive the membrane body, and the membrane body at one of the first guide rollers is used to connect to the tear-aid film so that the two are bonded together when the membrane body is pulled downstream; the lifting roller group cooperates with the at least two first guide rollers to guide the membrane body together, so that the membrane body is output to the downstream after passing around the two multiple times in a dynamic detour path.

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