PVB film winding and unwinding roller

Abstract

This utility model discloses a PVB film winding and unwinding roller, relating to the field of unwinding roller technology. It includes a roller rod, with a cylinder rotatably connected to the outer wall of the roller rod. A circular plate is symmetrically fixedly connected to the outer wall of the roller rod, abutting against the cylinder. A first groove is formed through the interior of the cylinder in a cross shape. A second groove is formed through the outer wall of the cylinder symmetrically relative to the first groove. A first arc-shaped block and a second arc-shaped block are slidably connected to the inner walls of the first and second grooves, respectively. Both the first and second arc-shaped blocks have cavities formed through their interiors. Triangular blocks are slidably connected to the inner walls of the cavities. By adjusting the extension and retraction of the arc-shaped blocks, the effective diameter of the roller can be continuously adjusted to accommodate the winding requirements of PVB films of different widths. The interlocking structure of the triangular blocks and triangular holes, combined with spring preload, ensures the stability of the arc-shaped blocks during operation, preventing loosening due to vibration.

Description

Technical Field

[0001] This utility model relates to the field of film spreading roller technology, specifically a PVB film winding and spreading roller. Background Technology

[0002] PVB film is a semi-transparent thermoplastic resin film. PVB film has a variety of excellent properties, such as excellent coating transparency, elasticity, toughness, high mechanical strength and low temperature impact resistance. It is used in the construction, automotive and industrial fields.

[0003] Most PVB film winding and unwinding rollers are rigid structures with fixed diameters. In particular, the effective winding diameter and width adaptation range cannot be adjusted once formed. Different specifications of PVB film require corresponding sized unwinding rollers, which reduces production efficiency. Therefore, it is necessary to propose a PVB film winding and unwinding roller. Utility Model Content

[0004] The purpose of this invention is to provide a PVB film winding and unwinding roller to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a PVB film winding and unwinding roller, comprising a roller rod, a cylinder rotatably connected to the outer wall of the roller rod, and a circular plate symmetrically fixedly connected to the outer wall of the roller rod, the circular plate abutting against the cylinder;

[0006] The cylinder has a first groove running through its interior in a cross shape. A second groove runs through its outer wall symmetrically relative to the first groove. A first arc-shaped block and a second arc-shaped block are slidably connected to the inner walls of the first and second grooves, respectively. Both the first and second arc-shaped blocks have cavities running through their interiors. Triangular blocks are slidably connected to the inner walls of the cavities. Triangular holes are equidistantly spaced through the inner walls of both the first and second grooves. The triangular blocks extend through the triangular holes. A third groove runs through the cylinder on one side of the first and second grooves. A slider is slidably connected to the inner wall of the third groove, and the slider is fixedly connected to the roller.

[0007] Preferably, an extrusion block is fixedly connected at equal intervals to one side of the outer wall of the slider, and the extrusion block abuts against the first arc-shaped block and the second arc-shaped block respectively.

[0008] Preferably, a screw hole is provided through one side of the outer wall of the circular plate, and the screw hole extends through into the cylinder and is threadedly connected to a fixing bolt.

[0009] Preferably, a spring is fixedly connected to one side of the inner wall of the cavity, and the other end of the spring is fixedly connected to the triangular block.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: by moving the positions of the first arc-shaped block and the second arc-shaped block, the outer diameter of the cylinder can be increased or decreased. After adjustment, the spring pushes the triangular block to move into the triangular hole to limit and fix the first arc-shaped block and the second arc-shaped block. The circular plate can be rotated so that the extrusion block abuts against the outer wall of the first arc-shaped block and the second arc-shaped block. Through the extension and retraction adjustment of the arc-shaped block, the effective diameter of the roller can be continuously adjusted to meet the winding requirements of PVB film of different widths. The snap-fit ​​structure between the triangular block and the triangular hole, combined with the spring pre-tightening force, ensures that the position of the arc-shaped block is stable during operation and avoids loosening due to vibration. Attached Figure Description

[0011] Figure 1 This is a front view structural diagram of the present utility model;

[0012] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0013] Figure 3 This is a front view schematic diagram of the first arc-shaped block and the second arc-shaped block of this utility model;

[0014] Figure 4 This is a schematic cross-sectional view of the first arc-shaped block of this utility model;

[0015] Figure 5 This is a schematic diagram of the slider mounting position structure of this utility model.

[0016] In the diagram: 1. Roller; 2. Cylinder; 3. First arc block; 4. Second arc block; 5. Triangular block; 6. Slider; 7. Circular plate; 8. Extrusion block; 9. Fixing bolt; 10. Spring. Detailed Implementation

[0017] Please see Figure 1-5 This utility model provides a technical solution:

[0018] Example 1: A PVB film winding and unwinding roller includes a roller rod 1, a cylinder 2 rotatably connected to the outer wall of the roller rod 1, and a circular plate 7 fixedly connected to the outer wall of the roller rod 1 in a symmetrical manner, with the circular plate 7 abutting against the cylinder 2;

[0019] The cylinder 2 has a first groove running through its interior in a cross shape. The outer wall of the cylinder 2 has a second groove running through it in a symmetrical shape relative to the first groove. The inner walls of the first groove and the second groove are slidably connected to a first arc-shaped block 3 and a second arc-shaped block 4, respectively. The interiors of the first arc-shaped block 3 and the second arc-shaped block 4 are both hollowed out. The inner walls of the cavities are slidably connected to triangular blocks 5. The inner walls of the first groove and the second groove are both equidistantly hollowed out with triangular holes. The triangular blocks 5 extend through into the triangular holes. The cylinder 2 has a third groove running through it on one side of the first groove and the second groove. The inner wall of the third groove is slidably connected to a slider 6, which is fixedly connected to the roller 1.

[0020] In use, the drive device drives the roller 1 to rotate, and the circular plate 7 and the slider 6 drive the cylinder 2 to rotate synchronously. The first arc block 3 and the second arc block 4 increase the effective diameter of the roller body, which can be adapted to the winding of PVB film.

[0021] When it is necessary to adapt to PVB films of different widths, the fixing bolt 9 is turned out of the screw hole, pushing the circular plate 7 to move axially along the roller 1, causing the slider 6 to slide in the third groove, so that the extrusion block 8 is separated from the first arc block 3 and the second arc block 4. The first arc block 3 and the second arc block 4 are pulled outward or moved inward to adjust the length of the first arc block 3 and the second arc block 4 outside the cylinder 2. After the adjustment is completed, the spring 10 pushes the triangular block 5 to move into the triangular hole to limit and fix the first arc block 3 and the second arc block 4. The circular plate 7 is rotated in the opposite direction so that the extrusion block 8 abuts against the first arc block 3 and the second arc block 4. The fixing bolt 9 is rotated into the screw hole to lock the circular plate 7.

[0022] After the second arc-shaped block 4 extends outward from the second groove on the outer wall of the cylinder 2, it will increase the effective outer diameter of the roller. With the increase in outer diameter, the length of the film that can be driven by the roller for each rotation increases, and the width of the film winding on the roller and the lateral coverage range are expanded accordingly, which can accommodate wider PVB films. When the first arc-shaped block 3 and the second arc-shaped block 4 move into the cylinder 2, the effective outer diameter of the roller decreases. At this time, the length of the film driven by the roller for each rotation is shortened, and the lateral coverage range is reduced, which can match narrower PVB films.

[0023] Example 2: The technical solutions in this example that differ from Example 1 include;

[0024] The outer wall of one side of the slider 6 is fixedly connected with extrusion blocks 8 at equal intervals. The extrusion blocks 8 abut against the first arc block 3 and the second arc block 4 respectively, so as to facilitate the use of extrusion blocks 8 to assist in limiting the first arc block 3 and the second arc block 4.

[0025] A screw hole is provided through one side of the outer wall of the circular plate 7. The screw hole extends through into the cylinder 2 and is threaded with a fixing bolt 9, so that the circular plate 7 and the cylinder 2 can be fixedly connected by the fixing bolt 9.

[0026] A spring 10 is fixedly connected to one side of the inner wall of the cavity, and the other end of the spring 10 is fixedly connected to the triangular block 5, so that the spring 10 can be used to push the triangular block 5 into the triangular hole to limit and fix the first arc block 3 and the second arc block 4.

Claims

1. A PVB film winding and unwinding roller, comprising a roller rod (1), wherein a cylinder (2) is rotatably connected to the outer wall of the roller rod (1), and a circular plate (7) is symmetrically fixedly connected to the outer wall of the roller rod (1), wherein the circular plate (7) abuts against the cylinder (2); Its features are, The cylinder (2) has a first groove running through its interior in a cross shape. The outer wall of the cylinder (2) has a second groove running through its interior in a symmetrical shape relative to the first groove. The inner walls of the first groove and the second groove are respectively connected to a first arc block (3) and a second arc block (4). The interiors of the first arc block (3) and the second arc block (4) are both provided with cavities. The inner walls of the cavities are connected to triangular blocks (5). The inner walls of the first groove and the second groove are provided with triangular holes at equal intervals. The triangular blocks (5) extend through the triangular holes. The cylinder (2) has a third groove running through its interior on one side of the first groove and the second groove. The inner wall of the third groove is connected to a slider (6). The slider (6) is fixedly connected to the roller (1).

2. The PVB film winding and unwinding roller according to claim 1, characterized in that: The outer wall of one side of the slider (6) is fixedly connected with extrusion blocks (8) at equal intervals. The extrusion blocks (8) abut against the first arc block (3) and the second arc block (4) respectively.

3. The PVB film winding and unwinding roller according to claim 1, characterized in that: A screw hole is provided through one side of the outer wall of the circular plate (7), and the screw hole extends through into the cylinder (2) and is threadedly connected to a fixing bolt (9).

4. The PVB film winding and unwinding roller according to claim 1, characterized in that: A spring (10) is fixedly connected to one side of the inner wall of the cavity, and the other end of the spring (10) is fixedly connected to the triangular block (5).

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