Film rewinding device
By designing the film tensioning assembly and the first pressing roller in the film rewinding device, the inertia problem of the original film roller when the film is stopped feeding or the tension is uneven, ensuring that the film is in a tight state, improving the neat collection ability of the rewinding roller, and reducing the size error of the rewinding film.
Patent Information
- Application Number
- CN202422311902.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-09-23
AI Technical Summary
The existing film rewinding device has a complex structure. When the film is sent at a stop or the film receives an uneven tension, the original film roller may continue to rotate under the action of inertia, resulting in the film being in a relaxed state, which is not conducive to the neat collection of the rewinding roller, and the size error of the rewinding film is amplified.
A thin film rewinding device is designed, including a base, a primary film roller, a rewinding roller and a film tensioning assembly. The film tensioning assembly is located below the directional roller, with adjustable height and has two tensioning parts for tightening the film on both sides of the directional roller to ensure that the film is in a tight state.
By providing a first pressing roller on the primary film roller, the inertia of rotation of the primary film roller is slowed down; the two tensioning parts of the membrane tensioning assembly ensure that the film is in a tight state during the rewinding process, avoid film slack, improve the neat collection ability of the rewinding roller, and reduce the size error of the rewinding film.
Smart Images
Figure CN223002434U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of film rewinding, in particular to a film rewinding device. Background Art
[0002] Generally, films are stored in rolls. Users can choose to purchase appropriate sizes according to actual needs. For example, when the required size is small, they can be stored by folding. However, when the user's demand is large but less than a full roll, it is often necessary to rewind the required film onto a roller for easy carrying and storage. During the film rewinding process, the film needs to be kept in a tensioned state to ensure that the film is neatly rewound onto the roller. Therefore, a tensioning device with a simple structure and stable performance is required. In the current rewinding device, the film on the original film roller rotates and feeds the film under the action of tension. When it is necessary to stop feeding the film or the tension is uneven (the tension is sometimes large and sometimes small), the original film roller may still continue to rotate and transport excess film under the action of inertia, causing the film to be in a loose state, which is not conducive to the neat collection by the rewinding roller and also magnifies the size error of the rewound film. Content of the Utility Model
[0003] The technical problem to be solved by the utility model is that the existing film coating device has a complex structure. When stopping film feeding or the film receives uneven tension, the original film roller will transport excess film under the action of inertia, making the film in a loose state, which is not conducive to the neat collection by the rewinding roller. In view of the above defects of the prior art, a film rewinding device is provided.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows:
[0005] Construct a film rewinding device, including a base, an original film roller, a rewinding roller and a film tensioning assembly. On both sides of the base in the length direction, a first support, a second support and a third support are provided. The first support and the third support are located at both ends of the base, and the second support is located between the first support and the third support. The original film roller is rotatably arranged on the first support, and the rewinding roller is rotatably arranged on the third support. A deflector roller and a film tensioning assembly are arranged on the second support. The film tensioning assembly is located below the deflector roller, and the height of the film tensioning assembly is adjustable. The film tensioning assembly has two tensioning parts, and the two tensioning parts are respectively used for tensioning the films on both sides of the deflector roller.
[0006] Preferably, the original film roller and the rewinding roller have the same height, and the height of the deflector roller is greater than the heights of the original film roller and the rewinding roller.
[0007] Preferably, the original film roller is rotatably arranged on the first bracket through bearings. A first slideway is formed on the part of the first bracket located above the original film roller. A first pressing roller is movably arranged in the first slideway. Bearings are arranged at both ends of the first pressing roller. The bearings can move up and down along with the first pressing roller. The bearings can slide relative to the first slideway. During use, under the action of its own gravity, the first pressing roller always abuts against the upper side of the film on the original film roller.
[0008] Preferably, counterweights are detachably arranged on the parts of both ends of the first pressing roller located outside the first slideway. The counterweights are used to adjust the pressure of the first pressing roller on the film on the original film roller.
[0009] Preferably, a second slideway is formed on the second bracket. The film tensioning assembly is slidably arranged in the second slideway. And the film tensioning assembly is controlled to lift and lower through a lifting structure arranged on the base.
[0010] Preferably, the film tensioning assembly includes a cross frame. Sliding terminals corresponding to the second slideway are arranged at both ends of the cross frame. Two movable brackets are hinged above the cross frame. A second pressing roller is arranged at one end of each movable bracket far away from the cross frame. The two movable brackets are connected by a pull rod so that the two movable brackets are symmetrically opened at a certain angle towards both sides of the cross frame. It should be noted that the movable bracket provided with the second pressing roller corresponds to the aforementioned tensioning part.
[0011] Preferably, the pull rod includes two main rods and a threaded rod. The two main rods are respectively hinged to one of the movable brackets. The main rods are hollow. Threads are arranged on the inner wall of the hollow part. A hexagonal nut is fixedly arranged in the middle of the threaded rod. Reverse threads are arranged on the threaded rod on both sides of the hexagonal nut.
[0012] The beneficial effects of the present utility model are as follows:
[0013] 1. The first pressing roller is arranged above the original film roller in the present utility model. The first pressing roller is rotatable. Under the action of its own gravity, the first pressing roller always maintains a downward movement trend. Thus, the first pressing roller can always maintain pressure to abut against the film on the original film roller, applying a downward pressure to the original film roller, and being able to slow down the inertia of the rotation of the original film roller.
[0014] 2. The film tensioning assembly has two symmetrical tensioning parts. During use, the film is located below the second pressing roller and above the deflection roller. The tensioning parts press the film on both sides of the deflection roller downward so that the film on both sides is in a tensioned state, which is more conducive to the rewinding roller to collect and rewind the film.
[0015] 3. The sliding terminals at both ends of the crossbar frame in the film tensioning assembly are slidably arranged in the second slideway, and the crossbar frame is controlled to lift by a lifting structure on the base located between two second brackets, so that the user can adjust the specific height of the film tensioning assembly according to the actual situation of the film tension during the rewinding process, thereby adjusting the pressure of the second pressing roller on the film. Moreover, the film tensioning assembly has two tensioning parts, and these two tensioning parts tension the film downward on both sides of the deflector roller, avoiding the too low position of the tensioning part when tensioning unilaterally. Brief Description of the Drawings
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will further illustrate the present invention in conjunction with the drawings and embodiments. The drawings in the following description are only partial embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings:
[0017] Figure 1 is a three-dimensional view of the present invention Figure 1 .
[0018] Figure 2 is a three-dimensional view of the present invention Figure 2 .
[0019] Figure 3 is a front view of the present invention based on Figure 1 .
[0020] Figure 4 is a sectional three-dimensional view of the present invention.
[0021] Figure 5 is a sectional view of the present invention in the applied state. Detailed Embodiments
[0022] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
[0023] As Figures 1-5 shown, as a preferred embodiment of the present invention, a film rewinding device is specifically disclosed, which includes a base 1, an original film roller 2, a rewinding roller 3, and a film tensioning assembly 4. The base 1 is a rectangular plate-like structure. Of course, support legs or support cabinets can also be provided on the lower surface of the plate-like structure (the support legs or support cabinets are not shown in the drawings) to make the upper surface of the base at a certain height.
[0024] On both sides in the length direction of the base 1, a first support 10, a second support 20 and a third support 30 are provided. And the first supports 10 on both sides correspond to each other, the second supports 20 on both sides correspond to each other, and the third supports 30 on both sides correspond to each other. That is to say, the first support 10, the second support 20 and the third support 30 are all arranged in pairs. Among them, the first support 10 and the third support 30 are located at both ends of the base, and the second support 20 is located between the first support 10 and the third support 30. Both ends of the original film roller 2 are rotatably arranged on the first support 10 through bearings, both ends of the rewinding roller 3 are rotatably arranged on the third support 30 through bearings. A deflecting roller 5 and a film tensioning assembly 4 are arranged on the second support 20. Both ends of the deflecting roller 5 are rotatably arranged at the upper end of the second support 20 through bearings. The film tensioning assembly 4 is located below the deflecting roller 5, and the height of the film tensioning assembly 4 is adjustable. The film tensioning assembly 4 has two tensioning parts, and the two tensioning parts are respectively used for tensioning the films on both sides of the deflecting roller 5.
[0025] In order to ensure that the original film roller 2 and the rewinding roller 3 can rotate normally before and after rewinding and will not contact the upper surface of the base 1 to cause film wear, the original film roller 2 and the rewinding roller 3 have the same height, and this height is greater than the distance from the outer side of the film on the original film roller 2 to the axis of the original film roller 2. This height should ensure that the film on the original film roller 2 does not rub against the upper surface of the base. The height of the deflecting roller 5 is greater than the heights of the original film roller 2 and the rewinding roller 3, so that the film between the original film roller 2 and the rewinding roller 3 is in a state of first upward and then downward.
[0026] As shown in the figure, a first slideway 101 is opened on the part of the first support 10 above the original film roller 2. A first pressure roller 6 is movably arranged on the first slideway 101. The axis of the first pressure roller 6 and the axis of the original film roller 2 are in the same vertical plane. Bearings are arranged at both ends of the first pressure roller 6, so that the first pressure roller 6 can move downward along with the decrease of the film thickness on the original film roller 2 while rotating. That is, under the action of its own gravity, the first pressure roller 6 always abuts against the upper side of the film on the original film roller 2.
[0027] Since the film on the original film roller 2 is continuously conveyed during the rewinding process, the first pressure roller 6 will move upward along the first slideway 101 under the action of the film. Therefore, in order to ensure that the film below the first pressure roller 6 is tightly pressed on the original film roller 2, counterweight blocks 7 are detachably arranged on the parts of both ends of the first pressure roller 6 outside the first slideway 101 to increase the overall gravity of the first pressure roller 6, that is, the pressure of the first pressure roller 6 on the film on the original film roller 2 is adjusted through the counterweight blocks 7.
[0028] To ensure that the film tensioning assembly can move vertically up and down, each second bracket 20 is provided with two second channels 201 arranged side by side. The second slideways 201 are arranged along the vertical direction, making the up and down movement of the film tensioning assembly 4 more stable. The film tensioning assembly 4 is slidably arranged in the second slideways 201, and the lifting of the film tensioning assembly 4 is controlled by a lifting structure 8 arranged on the base 1, where the lifting structure 8 can be a cylinder, a hydraulic cylinder or an electric cylinder, etc.
[0029] Specifically, the film tensioning assembly 4 includes a cross frame 401. Sliding terminals corresponding to the second slideways 201 are arranged at both ends of the cross frame 401. Hinge terminals are arranged on both sides of the cross frame 401 in the length direction. One movable bracket 402 is hinged on each hinge terminal on each side. That is to say, two movable brackets 402 are hinged on the cross frame 401. A second pressing roller 403 is arranged at one end of each movable bracket 402 away from the cross frame 401. That is, the movable bracket 402 is in an H shape. The middle connecting rods of the two H-shaped movable brackets 402 are connected by a pull rod 404, so that the two movable brackets 402 are symmetrically opened at a certain angle towards both sides of the cross frame 401. It should be noted that the movable bracket 402 provided with the second pressing roller 403 corresponds to the aforementioned tensioning part.
[0030] It should be noted that the pull rod 404 includes two main rods 4041 and a threaded rod 4042. The two main rods 4041 are respectively hinged to one of the movable brackets 402. The main rod 4041 is hollow, and threads are provided on the inner wall of the hollow part. A hexagonal nut is fixedly arranged in the middle of the threaded rod 4042. Reverse threads are arranged on the threaded rod on both sides of the hexagonal nut. The operator can change the length of the threaded rod 4042 screwed in or out by turning the hexagonal nut with a wrench, thereby changing the opening angle of the two movable brackets 402.
[0031] Of course, a driving motor is also arranged outside the third bracket. The output shaft of the driving motor is fixedly connected to the rewinding roller to drive the rewinding roller to rotate through the driving motor.
[0032] It should be understood that the present invention is described through some embodiments. As is known to those skilled in the art, without departing from the spirit and scope of the present invention, various changes or equivalent replacements can be made to these features and embodiments. In addition, under the teaching of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.
Claims
1. A film rewinding device, comprising a base, an original film roller, a rewinding roller and a film tensioning assembly, wherein a first bracket, a second bracket and a third bracket are arranged on both sides of the length direction of the base, wherein the first bracket and the third bracket are located at both ends of the base, and the second bracket is located between the first bracket and the third bracket, the original film roller is rotatably arranged on the first bracket, and the rewinding roller is rotatably arranged on the third bracket, characterized in that: A redirection roller and a film tensioning assembly are provided on the second bracket. The film tensioning assembly is located below the redirection roller and has an adjustable height. The film tensioning assembly has two tensioning parts, which are respectively used to tension the film on both sides of the redirection roller.
2. A film rewinding device according to claim 1, characterized in that: The original film roller and the rewinding roller have the same height, and the direction-changing roller has a height greater than that of the original film roller and the rewinding roller.
3. A film rewinding device according to claim 1, characterized in that: The original film roller is rotatably arranged on the first bracket through a bearing, and a first slide is opened on the part of the first bracket located on the upper side of the original film roller. A first pressure roller is movably arranged in the first slide. When in use, the first pressure roller always rests against the upper side of the film on the original film roller under the action of its own gravity.
4. A film rewinding device according to claim 3, characterized in that: Both ends of the first pressing roller are located on the outer side of the first slideway and are detachably provided with counterweight blocks, and the counterweight blocks are used to adjust the pressure of the first pressing roller on the film on the original film roller.
5. A film rewinding device according to claim 3, characterized in that: The second bracket is provided with a second slideway, the film tensioning assembly is slidably arranged in the second slideway, and the film tensioning assembly is controlled to rise and fall by a lifting structure arranged on the base.
6. A film rewinding device according to claim 5, characterized in that: The membrane tensioning assembly includes a horizontal frame, both ends of which are provided with sliding terminals corresponding to the second slide, two movable brackets are hingedly provided above the horizontal frame, a second pressure roller is provided at the end of each movable bracket away from the horizontal frame, and the two movable brackets are connected by a pull rod so that the two movable brackets are symmetrically opened at a certain angle toward both sides of the horizontal frame.
7. A film rewinding device according to claim 6, characterized in that: The pull rod includes two main rods and a threaded rod. The two main rods are hingedly connected to one of the movable brackets respectively. The main rod is hollow and has threads on the inner wall. A hexagonal nut is fixed in the middle of the threaded rod, and reverse threads are provided on the threaded rods on both sides of the hexagonal nut.