A vacuum film winding mechanism
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-08-11
AI Technical Summary
然而这种方法存在以下缺点：高精度的非接触式传感器价格昂贵，提高了整机成本，薄膜表面透明、反光或抖动，以及现场的水汽、粉尘都会对光波或声波信号产生干扰，导致测量数据跳变或失效，稳定性与可靠性挑战较大
[0011]本实用新型采用纯机械式的触发机构，完全替代了高精度的超声波或激光传感器。这些机械部件结构简单，均为标准件或易加工件，成本远低于非接触式测距传感器，极大地降低了整机的制造成本和维护成本。除此之外，本申请的工作原理依赖于直接的物理接触和机械传动，其完全不受真空膜表面透明、反光特性影响，也不受生产环境中水汽、粉尘的干扰，杜绝了因信号跳变导致的误报警或失灵。
Smart Images
Figure CN224619269U_ABST
Abstract
Description
Technical Field
[0001] This utility model particularly relates to a vacuum film winding mechanism. Background Technology
[0002] Vacuum film is a key material widely used in food preservation, industrial product packaging, and aseptic packaging of medical devices. In these applications, to ensure vacuum effectiveness and packaging quality, vacuum film is typically manufactured in large-diameter, long-length rolls for storage, transportation, and use. Existing vacuum film winding machines include basic components such as mounting brackets, drive motors, and winding frames. The drive motor rotates the winding frame via a transmission mechanism, continuously winding the vacuum film onto the winding frame (or core) to form a film roll. Current technologies primarily determine over-wound conditions using ultrasonic or laser ranging methods. These methods employ non-contact sensors to directly measure the distance from the sensor to the outer surface of the film roll, thus obtaining the film roll radius or diameter data directly and in real-time. However, this method has the following drawbacks: high-precision non-contact sensors are expensive, increasing the overall cost of the machine; the transparency, reflectivity, or vibration of the film surface, as well as moisture and dust in the environment, can interfere with the light or sound signals, causing measurement data jumps or failures, posing significant challenges to stability and reliability. Utility Model Content
[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a vacuum film winding mechanism.
[0004] A vacuum film winding mechanism includes a mounting bracket, a rotary motor mounted on the mounting bracket, and a winding frame for winding vacuum film connected to the rotary motor. A vertical frame is mounted on the mounting bracket, a linkage rod is movably mounted on the vertical frame, and a trigger element is mounted on the linkage rod. An opening adapted to the trigger element is formed on the vertical frame, and a sensing device is disposed within the opening. A movable channel for the linkage rod to move is also formed on the vertical frame, and a first elastic component is disposed within the movable channel. One end of the first elastic component is connected to the inner wall of the movable channel, and the other end is connected to the linkage rod. When the thickness of the vacuum film wound on the winding frame reaches a set value, the vacuum film pushes the linkage rod to move along the movable channel and squeezes the first elastic component, causing the trigger element to extend into the opening and trigger the sensing device.
[0005] Preferably, the winding frame includes a fixed shaft connected to the output end of the rotary motor, with winding reels coaxially fixed at both ends of the fixed shaft, and at least one reinforcing rod fixedly connected between the two winding reels. Multiple viewing windows for observing the state of the film roll are radially opened on the periphery of the winding reel.
[0006] Preferably, the movable channel has a first end near the winding rack and a second end away from the winding rack; the first elastic component includes a first mounting base fixedly connected to the second end of the movable channel, and a first spring disposed between the first mounting base and the linkage rod; when the linkage rod moves from the first end to the second end under the push of the vacuum diaphragm, the trigger extends into the opening and triggers the sensing device.
[0007] Preferably, the sensing device is a proximity switch.
[0008] Preferably, a pair of limiting rollers are provided on the linkage rod, and the distance between the limiting rollers is consistent with the width of the vacuum film, which is used to axially limit the film roll during the winding process; one of the limiting rollers is defined as a trigger, and when the film roll is wound to a set thickness, its outer surface pushes the two limiting rollers at the same time, driving the linkage rod to move, so that the limiting roller enters the opening to trigger the sensing device.
[0009] Preferably, the upright is further provided with a guide channel, and a second elastic component is provided in the guide channel. The second elastic component includes a second mounting base fixedly connected in the guide channel, and a second spring disposed between the second mounting base and the linkage rod.
[0010] The beneficial effects of this utility model are:
[0011] This invention employs a purely mechanical triggering mechanism, completely replacing high-precision ultrasonic or laser sensors. These mechanical components have simple structures, are all standard or easily manufactured parts, and their cost is far lower than that of non-contact ranging sensors, greatly reducing the overall manufacturing and maintenance costs. Furthermore, the working principle of this application relies on direct physical contact and mechanical transmission, and is completely unaffected by the transparent and reflective properties of the vacuum membrane surface, nor by moisture or dust in the production environment, thus eliminating false alarms or malfunctions caused by signal jumps. Attached Figure Description
[0012] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0013] Figure 1 This is a schematic diagram of the structure of a vacuum film winding mechanism according to this application;
[0014] Figure 2 For the purposes of this application Figure 1 A magnified view of part A in the image. Detailed Implementation
[0015] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
[0016] The orientation shown in the accompanying drawings should not be construed as limiting the specific protection scope of this utility model, but is only for reference and understanding of preferred embodiments. The product components shown in the drawings can be changed in position, increased in number, or simplified in structure.
[0017] The “connection” described in the specification and the “connection” relationship between the components shown in the accompanying drawings can be understood as a fixed connection, a detachable connection, or a connection that forms an integral unit; it can be a direct connection or a connection through an intermediate medium. Those skilled in the art can understand the connection relationship according to the specific circumstances and can derive different implementation methods such as screwing, riveting, soldering, snap-fitting, or embedding to suitably replace it.
[0018] The directional terms such as up, down, left, right, top, and bottom mentioned in the instruction manual and the directions shown in the attached drawings indicate that the components can directly contact each other or contact each other through other features; for example, "up" can mean directly above or diagonally above, or it simply means above other objects; other directions can be understood by analogy.
[0019] The materials used to manufacture solid-shaped parts as shown in the specification and drawings may be metallic, non-metallic, or other synthetic materials. The machining processes used for solid-shaped parts may include stamping, forging, casting, wire cutting, laser cutting, injection molding, CNC milling, 3D printing, machining, etc. Those skilled in the art may adapt or combine the above materials and manufacturing processes according to different processing conditions, costs, and precision requirements.
[0020] A vacuum film winding mechanism includes a mounting bracket 1, on which a rotary motor 2 is mounted, and the rotary motor 2 is connected to a winding frame for winding vacuum film. A vertical frame 4 is mounted on the mounting bracket 1, and a linkage rod 5 is movably mounted on the vertical frame 4. A trigger element is mounted on the linkage rod 5. An opening 6 adapted to the trigger element is formed on the vertical frame 4, and a sensing device is disposed within the opening 6. A movable channel 7 for the linkage rod 5 to move is also formed on the vertical frame 4. A first elastic component 8 is disposed within the movable channel 7, one end of which is connected to the inner wall of the movable channel 7, and the other end is connected to the linkage rod 5. When the thickness of the vacuum film wound on the winding frame reaches a set value, the vacuum film pushes the linkage rod 5 to move along the movable channel 7 and squeezes the first elastic component 8, causing the trigger element to extend into the opening 6 and trigger the sensing device.
[0021] Furthermore, the winding frame includes a fixed shaft 31 connected to the output end of the rotary motor 2. Both ends of the fixed shaft 31 are coaxially fixed with winding reels 32. At least one reinforcing rod 33 is fixedly connected between the two winding reels 32. Multiple viewing windows 34 for observing the state of the film roll are radially opened on the periphery of the winding reel 32.
[0022] Furthermore, the movable channel 7 has a first end near the winding frame and a second end away from the winding frame; the first elastic component 8 includes a first mounting base 81 fixedly connected to the second end of the movable channel 7, and a first spring 82 disposed between the first mounting base 81 and the linkage rod 5; when the linkage rod 5 moves from the first end to the second end under the push of the vacuum membrane, the trigger extends into the opening 6 and triggers the sensing device.
[0023] Furthermore, the sensing device is a proximity switch.
[0024] Furthermore, a pair of limiting rollers 51 are provided on the linkage rod 5. The distance between the limiting rollers 51 is consistent with the width of the vacuum film, which is used to axially limit the film roll during the winding process. One of the limiting rollers 51 is defined as a trigger. When the film roll is wound to a set thickness, its outer surface pushes the two limiting rollers 51 at the same time, driving the linkage rod 5 to move, so that the limiting rollers 51 enter the opening 6 to trigger the sensing device.
[0025] Furthermore, the support frame 4 is also provided with a guide channel 9, and a second elastic component 91 is provided in the guide channel 9. The second elastic component 91 includes a second mounting base 911 fixedly connected in the guide channel 9, and a second spring 912 disposed between the second mounting base 911 and the linkage rod 5.
[0026] The working principle of this utility model is as follows:
[0027] When the winding has not started or the film roll is small, the elastic force of the first elastic component 8 pushes the linkage rod 5 so that it is in the active channel 7 near one end of the winding frame (i.e., the first end). At this time, the trigger on the linkage rod 5 is away from the opening 6 on the stand 4, and the sensing device is not triggered. That is, at this time the winding frame can be in the state of continuing to wind.
[0028] As the rotary motor 2 drives the winding frame to continuously wind the vacuum film, the outer diameter of the film roll gradually increases. When the outer surface of the film roll increases to the point of contact with the linkage rod 5, the linkage rod 5 is pushed. As winding continues, the film roll pushes the linkage rod 5, and the linkage rod 5 compresses the first elastic component 8, which slides along the movable channel 7 from the first end near the winding frame to the second end away from the winding frame. At this time, the movement of the linkage rod 5 will cause the trigger element on it to move synchronously. When the thickness of the film roll reaches the preset "full roll" thickness, the linkage rod 5 is pushed to the second end of the movable channel 7. The trigger element then extends into the opening 6 of the stand 4 and acts on the sensing device. For example, after the sensing device is triggered, it can send a signal to remind the operator that the roll is full and needs to be stopped and the roll changed in time. After the change is completed, the linkage rod 5 loses the force of the film roll, and the first elastic component 8 will restore its deformation, causing the linkage rod 5 to return to the first end near the winding frame, thus enabling the next winding reminder.
[0029] Based on the above technical solution, the first elastic component 8 of this application, as an embodiment 1, can be configured as follows: a first mounting base 81 is fixed on the second end of the movable channel 7, and a first spring 82 is provided between the first mounting base 81 and the linkage rod 5. That is, when the linkage rod 5 is subjected to the force of the membrane roll, the linkage rod 5 will first compress the first spring 82. Through the elastic action of the first spring 82, the linkage rod 5 can approach the opening 6. When the force of the membrane roll on the linkage rod 5 is removed, the first spring 82 will restore its deformation and drive the linkage rod 5 away from the opening 6.
[0030] Based on the above technical solution, this application also provides a guide channel 9 on the support frame 4, and a second elastic component 91 is provided in the guide channel 9. Similarly, the principle of the second elastic component 91 can be referred to the first elastic component 8. The function of the guide channel 9 is more to provide guidance for the movement trajectory of the linkage rod 5. The cooperation between the guide channel 9 and the movable channel 7 can make the linkage rod 5 move smoothly.
[0031] Based on the above technical solution, as Embodiment 1, the winding frame can be set as a fixed shaft 31, with two winding reels 32 coaxially fixed at both ends of the fixed shaft 31 for fitting the two sides of the film roll. The distance between the two winding reels 32 determines the maximum width of the film roll, playing a key axial limiting role in the film material during the winding process and preventing the film material from deviating. The reinforcing rod 33 connected between the two winding reels 32 and the fixed shaft 31 together form a stable spatial frame structure. The viewing window 34 opened on the periphery of the winding reel 32 allows the operator to directly observe the winding situation inside the film roll without stopping the machine.
[0032] Based on the above technical solution, a pair of limiting rollers 51 are provided on the linkage rod 5. When the diameter of the film roll increases, its cylindrical outer surface will simultaneously contact the two limiting rollers 51. Since the two limiting rollers 51 are installed on the same linkage rod 5, the radial thrust applied by the film roll to the two rollers will act together on the linkage rod 5, generating a uniform and balanced pushing force. One of the limiting rollers 51 can be defined as a trigger, that is, the linkage rod 5 will drive one of the limiting rollers 51 to move into the opening 6 to trigger the sensing device. The trigger here can be a mechanical pressing sensing device. For example, during the process of the limiting roller 51 moving into the opening 6, its outer circumferential surface or end directly mechanically contacts and presses the sensitive element of the sensing device, or during the process of the limiting roller 51 moving into the opening 6, its metal body enters the effective detection area of the sensing device, but no physical contact is required. For example, it enters the sensing distance of the proximity switch, changing its electric field or magnetic field to trigger a signal.
[0033] This invention employs a purely mechanical triggering mechanism (linkage rod, trigger block, elastic component, and sensing device), completely replacing high-precision ultrasonic or laser sensors. These mechanical components have simple structures, are all standard or easily manufactured parts, and their cost is far lower than that of non-contact ranging sensors, significantly reducing the overall manufacturing and maintenance costs. Furthermore, the working principle of this application relies on direct physical contact and mechanical transmission, completely unaffected by the transparent and reflective properties of the vacuum membrane surface, and unaffected by moisture or dust in the production environment, thus eliminating false alarms or malfunctions caused by signal jumps.
[0034] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made to the present invention without departing from the principles and spirit of the present invention as defined by the claims. Therefore, the detailed description of the embodiments in this disclosure is for explanation only and not for limiting the present invention, but rather the scope of protection is defined by the content of the claims.
Claims
1. A vacuum film winding mechanism, characterized in that, The device includes a mounting bracket (1), on which a rotary motor (2) is mounted, and the rotary motor (2) is connected to a winding frame for winding up the vacuum film; a stand (4) is mounted on the mounting bracket (1), and a linkage rod (5) is movably mounted on the stand (4), with a trigger on the linkage rod (5); an opening (6) adapted to the trigger is provided on the stand (4), and a sensing device is provided in the opening (6); the stand (4) also has a space for the linkage rod to pass through. (5) An active channel (7) is provided in the active channel (7). One end of the first elastic component (8) is connected to the inner wall of the active channel (7), and the other end is connected to the linkage rod (5). When the vacuum film on the winding frame reaches the set value, the vacuum film pushes the linkage rod (5) to move along the active channel (7) and squeeze the first elastic component (8), so that the trigger extends into the opening (6) and triggers the sensing device.
2. The vacuum film winding mechanism according to claim 1, characterized in that, The winding frame includes a fixed shaft (31) connected to the output end of the rotary motor (2). Both ends of the fixed shaft (31) are coaxially fixed with winding reels (32). At least one reinforcing rod (33) is fixedly connected between the two winding reels (32). Multiple viewing windows (34) for observing the state of the film roll are radially opened on the periphery of the winding reel (32).
3. The vacuum film winding mechanism according to claim 1, characterized in that, The movable channel (7) has a first end near the winding rack and a second end away from the winding rack; the first elastic component (8) includes a first mounting base (81) fixedly connected to the second end of the movable channel (7) and a first spring (82) disposed between the first mounting base (81) and the linkage rod (5); when the linkage rod (5) moves from the first end to the second end under the push of the vacuum membrane, the trigger extends into the opening (6) and triggers the sensing device.
4. The vacuum film winding mechanism according to claim 1, characterized in that, The sensing device is a proximity switch.
5. A vacuum film winding mechanism according to claim 1, characterized in that, A pair of limiting rollers (51) are provided on the linkage rod (5). The distance between the limiting rollers (51) is consistent with the width of the vacuum film and is used to axially limit the film roll during the winding process. One of the limiting rollers (51) is defined as a trigger. When the film roll is wound to a set thickness, its outer surface pushes the two limiting rollers (51) at the same time, driving the linkage rod (5) to move and causing the limiting roller (51) to enter the opening (6) to trigger the sensing device.
6. A vacuum film winding mechanism according to claim 1, characterized in that, The support frame (4) is also provided with a guide channel (9), and a second elastic component (91) is provided in the guide channel (9). The second elastic component (91) includes a second mounting base (911) fixedly connected in the guide channel (9), and a second spring (912) provided between the second mounting base (911) and the linkage rod (5).