Traction rotating device on film

Abstract

The utility model discloses a thin film upper traction rotating device which comprises a plurality of air floating rollers, the air floating rollers are vertically arranged, a plurality of guide rollers are vertically arranged at intervals with the air floating rollers, and a thin film alternately bypasses the guide rollers and the air floating rollers from bottom to top to form a multi-bending traction track. The air floating rollers are rotationally connected with swing frames, the swing axes of the multiple swing frames are collinear up and down, and the outer circle faces of the multiple air floating rollers are tangent to the swing axes. When the air floating roller swings, the roller surface is always kept tangent to the swinging axis of the air floating roller, the poor problems of stretching and the like caused by deviation of a film relative to the central position of the air floating roller are avoided, and the quality of the film subjected to upper traction is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of film production equipment, in particular to a film upper traction rotating device. Background Art

[0002] In the production and processing of thin films, an upper traction rotating device is often used, in which an air flotation roller is usually provided. During the film guiding process of the upper traction rotating device, an air cushion is formed between the contact surface of the film and the air flotation roller to reduce the friction between the air flotation roller and the film. At the same time, in order to cope with the tension changes during the film traction process, the air flotation roller can be swung to absorb the changes in the film tension. However, in the existing device, since the contact surface of the film and the air flotation roller is eccentric to the swing axis by a certain distance during the swing, the film slips axially on the surface of the air flotation roller, thereby causing the film to be stretched and affecting the quality of the film. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a film traction rotating device, which always keeps the roller surface tangent to its swing axis when the air flotation roller swings, avoiding the film from shifting relative to the center position of the air flotation roller and causing stretching and other undesirable problems, thereby ensuring the quality of the film after traction.

[0004] Technical solution: To achieve the above-mentioned purpose, the utility model provides a film traction rotating device, comprising a plurality of air flotation rollers, wherein the plurality of air flotation rollers are arranged vertically, and a plurality of guide rollers are arranged vertically at intervals from the plurality of air flotation rollers. The film alternately passes around the plurality of guide rollers and the plurality of air flotation rollers from bottom to top to form a multi-bend traction track; the air flotation rollers are rotatably connected to a swing frame, the swing axes of the plurality of swing frames are collinear up and down, and the outer circumferential surfaces of the plurality of air flotation rollers are tangent to the swing axis.

[0005] Furthermore, the swing frame includes a rotating shaft, which is arranged along the swing axis direction, the rotating shaft is connected to the swing member, the swing member is equipped with a crossbeam, and two cantilever brackets are arranged on one side of the crossbeam, and the two cantilever brackets are respectively rotatably matched with the two ends of the roller shaft of the air floating roller.

[0006] Furthermore, the swing member is a fan-shaped structure, and the rotating shaft is located at its top angle; the arc surface of the swing member is set as a gear surface, and the gear surface is connected to the output end of the driving device through a gear transmission group.

[0007] Furthermore, the gear transmission group includes a transmission gear meshing with the gear surface, the transmission gear and the driven gear are sleeved on the same transmission rod, the driven gear is meshed with the driving gear, and the driving gear is sleeved on the output end of the driving device.

[0008] Furthermore, a plurality of the transmission gears are sleeved on the same transmission rod.

[0009] Furthermore, the driven gears are arranged in two and are respectively sleeved on the upper and lower ends of the transmission rod; the two driving gears respectively meshing with the two driven gears have their rotation axes aligned up and down and are both arranged along the swing axis direction.

[0010] Beneficial effect: The utility model is a film traction rotating device, in which the contact point between the air flotation roller and the film is arranged tangent to its own swing axis, so that during the swinging process, the linear speed difference between the air flotation roller and the corresponding point of the film on it is small, thereby avoiding the relative displacement between the film and the air flotation roller, making the film traction process more stable, avoiding undesirable problems such as stretching caused by displacement, and ensuring the quality of the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Attached Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0012] Attached Figure 2 For attachment Figure 1 A schematic structural diagram of the middle swing frame 4;

[0013] Attached Figure 3 The figure is a schematic diagram of the structure of a gear transmission group according to an embodiment of the utility model. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings.

[0015] As attached Figure 1-3 The film traction rotating device described herein comprises a plurality of air flotation rollers 1, wherein the plurality of air flotation rollers 1 are arranged vertically, and a plurality of guide rollers 3 are arranged vertically at intervals from the plurality of air flotation rollers 1. The film 2 alternately passes around the plurality of guide rollers 3 and the plurality of air flotation rollers 1 from bottom to top to form a multi-bend traction track; the air flotation rollers 1 are rotatably connected to a swing frame 4, and the swing axes 40 of the plurality of swing frames 4 are collinear from top to bottom, and the outer circumferential surfaces of the plurality of air flotation rollers 1 are tangent to the swing axis 40.

[0016] This solution aligns the swing axes of multiple air flotation rollers up and down, and sets the roller surface of each air flotation roller tangent to the swing axis, so that the air flotation roller always swings around the center position of the roller surface where it contacts the film when swinging, thereby reducing the difference between the linear velocity of the air flotation roller when swinging and the linear velocity of the film when following the swing, thereby avoiding lateral displacement of the film relative to the surface of the air flotation roller during the swinging process, avoiding stretching and damage to the film during the traction process, and avoiding affecting the quality of the film.

[0017] The swing frame 4 includes a rotating shaft 41, which is arranged along the direction of the swing axis 40, and the rotating shaft 41 is connected to the swing member 42, and the swing member 42 is installed with a crossbeam 43. Two cantilever brackets 44 are arranged on one side of the crossbeam 43, and the two cantilever brackets 44 are respectively rotatably matched with the two ends of the roller shaft of the air floating roller 1. Preferably, the air floating roller and the crossbeam are respectively located on both sides of the rotating shaft to maintain balance during swinging.

[0018] The swing member 42 is a fan-shaped structure, and the rotating shaft 41 is located at its top angle; the arc surface of the swing member 42 is set as a gear surface, and the gear surface is connected to the output end of the driving device through a gear transmission group. The rotation of the gear drives the swing member to swing, which can make the swing more stable and easier to control the direction and amplitude of the swing, so as to better absorb the change of film tension during the traction process.

[0019] The gear transmission group includes a transmission gear 5 meshing with the gear surface, the transmission gear 5 and the driven gear 6 are sleeved on the same transmission rod 7, the driven gear 6 is meshed with the driving gear 8, and the driving gear 8 is sleeved on the output end of the driving device. According to the selection of the size specifications of the driven gear 6, the driving gear 8 and the transmission gear 5, a reduction transmission mechanism with different conversion rates can be realized, thereby achieving the adaptation of the selected motor and the required swing accuracy.

[0020] Preferably, the plurality of transmission gears 5 are sleeved on the same transmission rod 7. A single driving device can be used to drive the synchronous swing adjustment of the plurality of air-floating rollers, and the consistency of the swing direction can be ensured. Moreover, the use of multiple gear sets for transmission can make the overall transmission structure avoid to one side. Compared with some devices in the prior art that drive the synchronous swing of the plurality of air-floating rollers through the main shaft, this solution can avoid the main shaft from occupying the position space of the swing axis, allowing the air-floating roller to be arranged tangent to the swing axis, and solving the problem of installation interference caused by the main shaft.

[0021] The driven gears 7 are provided in two pieces and are respectively sleeved on the upper and lower ends of the transmission rod 7; the two driving gears 8 respectively meshing with the two driven gears 7 have their rotation axes aligned up and down and are both arranged along the direction of the swing axis 40. Of course, the motors of the two driving gears do not work at the same time, only one of them works, and the other is used as a standby in case of failure or maintenance. The same specification gear sets are used at both ends of the transmission rod to ensure the stability and reliability of the transmission.

[0022] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A film traction rotating device, Features: The invention comprises a plurality of air flotation rollers (1), wherein the plurality of air flotation rollers (1) are arranged vertically, and a plurality of guide rollers (3) are arranged vertically at intervals from the plurality of air flotation rollers (1). The film (2) alternately passes over the plurality of guide rollers (3) and the plurality of air flotation rollers (1) from bottom to top to form a multi-bend traction track; the air flotation rollers (1) are rotatably connected to a swing frame (4), the swing axes (40) of the plurality of swing frames (4) are collinear, and the outer circumferential surfaces of the plurality of air flotation rollers (1) are tangent to the swing axes (40).

2. A film traction rotating device according to claim 1, Features: The swing frame (4) comprises a rotating shaft (41), the rotating shaft (41) is arranged along the direction of the swing axis (40), the rotating shaft (41) is connected to a swing member (42), the swing member (42) is installed with a cross beam (43), and two cantilever brackets (44) are arranged on one side of the cross beam (43), and the two cantilever brackets (44) are respectively rotatably matched with the two ends of the roller shaft of the air floating roller (1).

3. A film traction rotating device according to claim 2, Features: The swing member (42) is a fan-shaped structure, and the rotating shaft (41) is located at its top angle; the arc surface of the swing member (42) is set as a gear surface, and the gear surface is connected to the output end of the driving device through a gear transmission group.

4. A film traction rotating device according to claim 3, Features: The gear transmission group comprises a transmission gear (5) meshing with the gear surface, the transmission gear (5) and the driven gear (6) are sleeved on the same transmission rod (7), the driven gear (6) is meshed with the driving gear (8), and the driving gear (8) is sleeved on the output end of the driving device.

5. A film traction rotating device according to claim 4, Features: The plurality of transmission gears (5) are sleeved on the same transmission rod (7).

6. A film traction rotating device according to claim 5, Features: The driven gears (6) are arranged at two ends and are respectively sleeved on the upper and lower ends of the transmission rod (7); the two driving gears (8) respectively meshing with the two driven gears (6) have their rotation axes aligned up and down and are both arranged along the direction of the swing axis (40).

Images