Stretch film to prevent slippage

Abstract

The patent discloses a kind of stretch film of preventing skidding, including fixed roller, stretch film and connecting frame, stretch film is installed with the outside of fixed roller, the upper and lower ends of fixed roller are all installed with support rod, the outside of support rod is sleeved with antiskid rubber ring, connecting frame includes connecting rod, limit sleeve ring, insert cylinder, rotating block and friction sheet, connecting rod is connected with the frame body of external film winding machine, the other end of connecting rod is installed with limit sleeve ring, limit sleeve ring can be sleeved in the outside of antiskid rubber ring, insert cylinder is inserted in the side wall of limit sleeve ring, rotating block is rotatably installed in insert cylinder, the side wall of rotating block is installed with friction sheet, rotating block is arranged in insert cylinder of the device, so that it can be rotated by rotating block and drive friction sheet, so that the direction of the pattern of friction sheet and the rotation direction of antiskid rubber ring form angle difference, can further optimize the long-acting nature of skid resistance, simultaneously realized by simple rotating action, simple structure, convenient for promotion.

Description

Technical Field

[0001] This patent relates to the field of stretch wrapping technology, specifically a stretch film to prevent slippage. Background Technology

[0002] Stretch film, also known as stretch film or heat shrink film, was first produced in China using PVC as the base material and DOA as a plasticizer that also acts as a self-adhesive agent. Its high transparency facilitates the identification of goods, and its high longitudinal elongation is beneficial for pre-stretching and saves material consumption. The stretch film machine uses a fixed roller to drive the stretch film to rotate and achieve the wrapping action. If the connection point slips, the stretch film will not be able to unfold at the set speed, resulting in empty spinning or jamming, which will lead to uneven packaging layers and loose wrapping of goods, affecting packaging quality. Therefore, existing stretch films are equipped with rubber rings at both ends to increase the friction between the stretch film and the frame on the stretch film machine after it is installed on the stretch film machine, so as to prevent the stretch film from slipping. However, after long-term use, the surface of the anti-slip rubber ring on the existing stretch film gradually becomes smooth due to friction, and the interlocking effect of the texture will weaken, resulting in a decrease in friction. Utility Model Content

[0003] The purpose of this patent is to provide a stretch film that prevents slippage, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this patent provides the following technical solution: a stretch film to prevent slippage, comprising a fixed roller, a stretch film and a connecting frame, wherein the stretch film is wound around the outside of the fixed roller, and support rods are installed at both the upper and lower ends of the fixed roller, and anti-slip rubber rings are sleeved on the outside of the support rods; The connecting frame includes a connecting rod, a limiting collar, a insert, a rotating block, and a friction plate. The connecting rod is connected to the frame of the external wrapping machine. A limiting collar is installed at the other end of the connecting rod. The limiting collar can be sleeved on the outside of the anti-slip rubber ring. An insert is inserted into the side wall of the limiting collar. A rotating block is rotatably installed inside the insert. A friction plate is installed on the side wall of the rotating block. The friction plate can fit against the side wall of the anti-slip rubber ring.

[0005] Preferably, the connecting rod includes a rod body, a nut, and a threaded sleeve. The rod body is installed on the side wall of the limiting collar. The outer side of the rod body is provided with an external thread. The nut is installed on the outer side of the rod body by rotating the thread. The threaded sleeve is installed on the side wall of the nut. The threaded sleeve can be screwed into and installed on the frame of the external wrapping machine.

[0006] Preferably, the friction pad includes a telescopic rod, a spring, a base plate, and anti-slip texture. One end of the telescopic rod is mounted on the side wall of the rotating block, and the other end of the telescopic rod is mounted on the base plate. The side wall of the base plate is provided with anti-slip texture, and the base plate can fit against the side wall of the anti-slip rubber ring. A spring is sleeved on the outside of the telescopic rod, and one end of the spring fits against the side wall of the rotating block, while the other end fits against the side wall of the base plate.

[0007] Preferably, the outer peripheral wall of the rotating block is provided with at least two sets of positioning slots, and the side wall of the insert is equipped with an elastic positioning pin that cooperates with the positioning slot, and the elastic positioning pin can be inserted into the positioning slot.

[0008] Preferably, the anti-slip rubber ring has a split structure, including at least two rubber ring parts. Bolts are inserted into the side walls of the rubber ring parts, and the side walls of the support rod have threaded holes that mate with the bolts. The bolts are screwed into the threaded holes.

[0009] Preferably, a pressure ring is fitted onto the outer side of the bolt, and the pressure ring can be pressed against the side wall of the rubber ring assembly.

[0010] Compared with existing technologies, the beneficial effects of this patent are: This device uses a rotating block inside its insert to drive the friction plate to rotate, thereby creating an angle difference between the texture direction of the friction plate and the rotation direction of the anti-slip rubber ring. This further optimizes the long-term effectiveness of the anti-slip performance. It is achieved through a simple rotational action, has a simple structure, and is easy to promote. In addition, a spring is installed on the outside of the telescopic rod to support the friction plate, thus ensuring that the friction plate remains in contact with the anti-slip rubber ring. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this patent.

[0012] Figure 2 This is a schematic diagram of the cross-sectional structure of the connecting frame of this patent.

[0013] Figure 3 for Figure 2 Schematic diagram of the structure at point A in the middle.

[0014] In the diagram: 1. Fixed roller, 2. Stretch film, 3. Connecting frame, 4. Support rod, 5. Anti-slip rubber ring, 6. Positioning slot, 7. Elastic positioning pin, 31. Connecting rod, 32. Limiting collar, 33. Insert sleeve, 34. Rotating block, 35. Friction plate, 311. Rod body, 312. Nut, 313. Threaded sleeve, 351. Telescopic rod, 352. Spring, 353. Base plate, 354. Anti-slip texture, 51. Separate rubber ring, 52. Bolt, 53. Threaded hole, 54. Pressure ring. Detailed Implementation

[0015] The technical solutions of this patent embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this patent, and not all of them. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0016] Please see Figure 1-3 This patent provides a technical solution: a stretch film to prevent slippage, including a fixed roller 1, a stretch film 2 and a connecting frame 3. The stretch film 2 is wound around the outside of the fixed roller 1. Support rods 4 are installed at both the upper and lower ends of the fixed roller 1. Anti-slip rubber rings 5 ​​are sleeved on the outside of the support rods 4. The fixed roller 1 serves as the winding carrier for the stretch film 2, with the stretch film 2 tightly wound on its outer side. In actual production, the stretch film 2 is tightly wound on the outer side of the fixed roller 1. As the packaging operation proceeds, the stretch film 2 is gradually released from the fixed roller 1 and participates in the packaging. The support rods 4, which are vertically installed at the upper and lower ends of the fixed roller 1, are made of high-strength metal material and have good rigidity and stability. The anti-slip rubber rings 5 ​​sleeved on the outer side of the support rods 4 are made of special rubber material with high friction coefficient and wear resistance. The surface of this material has been specially treated and presents an uneven textured structure on a microscopic scale, which can greatly increase the friction with external parts and lay the foundation for preventing slippage from the source. The connecting frame 3 includes a connecting rod 31, a limiting collar 32, an insert 33, a rotating block 34, and a friction plate 35. The connecting rod 31 is connected to the frame of the external wrapping machine. The other end of the connecting rod 31 is equipped with a limiting collar 32, which can be sleeved on the outside of the anti-slip rubber ring 5. The insert 33 is inserted into the side wall of the limiting collar 32. The rotating block 34 is rotatably installed inside the insert 33. The side wall of the rotating block 34 is equipped with a friction plate 35, which can fit against the side wall of the anti-slip rubber ring 5. The connecting frame 3 is the key hub connecting the stretch film assembly and the external wrapping machine. It includes multiple components such as the connecting rod 31, the limiting collar 32, the insert 33, the rotating block 34, and the friction plate 35. The connecting rod 31 is responsible for connecting to the frame of the external wrapping machine, and securely installing the stretch film assembly on the wrapping machine. The limiting collar 32 can be precisely fitted onto the outside of the anti-slip rubber ring 5, which plays a role in further positioning and limiting slippage. The insert 33, the rotating block 34, and the friction plate 35 work together to form a dynamic anti-slip adjustment device, which increases friction to deal with the slippage trend of the stretch film 2 in real time during the conveying process. At the same time, the friction plate 35 can be rotated by the rotating block 34, so that the texture direction of the friction plate 35 and the rotation direction of the anti-slip rubber ring 5 form an angle difference, which can further optimize the long-term anti-slip performance. This can be achieved through a simple rotation action, with a simple structure that is easy to promote.

[0017] Specifically, the connecting rod 31 includes a rod body 311, a nut 312, and a threaded sleeve 313. The rod body 311 is installed on the side wall of the limiting collar 32. The outer side of the rod body 311 is provided with an external thread. The nut 312 is installed on the outer side of the rod body 311 by rotating the thread. The threaded sleeve 313 is installed on the side wall of the nut 312. The threaded sleeve 313 can be screwed into and installed on the frame of the external wrapping machine.

[0018] Specifically, the friction pad 35 includes a telescopic rod 351, a spring 352, a base plate 353, and anti-slip texture 354. One end of the telescopic rod 351 is installed on the side wall of the rotating block 34, and the other end of the telescopic rod 351 is installed on the base plate 353. The side wall of the base plate 353 is provided with anti-slip texture 354. The base plate 353 can fit against the side wall of the anti-slip rubber ring 5. The spring 352 is sleeved on the outside of the telescopic rod 351. One end of the spring 352 fits against the side wall of the rotating block 34, and the other end fits against the side wall of the base plate 353. The telescopic rod 351 is made of high-strength stainless steel, possessing excellent resistance to deformation. One end is fixed to the side wall of the rotating block 34, and the other end is connected to the base plate 353, allowing it to extend and retract freely within a certain range, providing flexible movement space for the base plate 353. The anti-slip texture 354 on the surface of the base plate 353 is made using laser engraving technology, with the texture being an interlaced serrated pattern. Furthermore, the spring 352 ensures that the base plate 353 remains in constant contact with the side wall of the anti-slip rubber ring 5, thereby guaranteeing friction.

[0019] Specifically, the outer peripheral wall of the rotating block 34 is provided with at least two sets of positioning slots 6, and the side wall of the insert 33 is provided with elastic positioning pins 7 that cooperate with the positioning slots 6. The elastic positioning pins 7 can be inserted into the positioning slots 6. At least two sets of positioning slots 6 are provided, evenly distributed around the circumference. The slots are right-angled trapezoids, which can precisely engage with the conical head of the elastic positioning pin 7. The elastic positioning pin 7 contains a micro spring, giving it elastic extension and retraction capabilities. When the angle of the friction plate 35 needs to be adjusted to adapt to different working conditions, the operator only needs to press the end of the elastic positioning pin 7 to disengage it from the positioning slot 6, overcoming the spring resistance. Then, the rotating block 34 can be easily rotated to adjust the friction plate 35 to the appropriate angle. After releasing the elastic positioning pin 7, under the action of the internal spring force, the elastic positioning pin 7 automatically engages with the corresponding positioning slot 6, achieving precise positioning of the rotating block 34. This ensures that the friction plate 35 is always at the optimal anti-slip working angle, effectively improving the controllability and adaptability of the anti-slip effect.

[0020] Specifically, the anti-slip rubber ring 5 has a split structure, including at least two rubber ring splits 51. Bolts 52 are inserted into the side walls of the rubber ring splits 51, and threaded holes 53 that mate with the bolts 52 are opened on the side walls of the support rod 4. The bolts 52 are screwed into the threaded holes 53. The rubber ring split 51 is arc-shaped, and multiple rubber ring splits 51 can be combined into a complete ring and fixed to the outside of the support rod 4 by bolts 52. At the same time, its split structure can also facilitate later replacement, so that only the rubber ring split 51 with more wear needs to be replaced, saving costs.

[0021] Specifically, a pressure ring 54 is sleeved on the outside of the bolt 52, and the pressure ring 54 can be pressed against the side wall of the rubber ring body 51.

[0022] Working principle: Two connecting frames 3 are installed on the external wrapping machine via connecting rods 31. Then, one end of the stretch film 2 can be pulled out and fixed to the outside of the goods. Then, the turntable on the wrapping machine is started, which drives the goods to rotate, thereby continuously wrapping the stretch film 2 around the outside of the goods. At the same time, the wrapping machine will drive this device to move up and down, thereby expanding the wrapping area. During the winding process, the friction plate 35 is in contact with the anti-slip rubber ring 5, thereby increasing the friction force when the fixed roller 1 rotates, thus preventing slippage. In addition, the operator can rotate the friction plate 35 by rotating the block 34, so that the texture direction of the friction plate 35 and the rotation direction of the anti-slip rubber ring 5 form an angle difference, which can further optimize the long-term effectiveness of the anti-slip performance.

[0023] It will be apparent to those skilled in the art that this patent is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this patent. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this patent is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this patent. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A stretch film for preventing slippage, comprising a fixed roller (1), a stretch film (2), and a connecting frame (3), characterized in that: A stretching film (2) is wound around the outside of the fixed roller (1), and support rods (4) are installed at both the upper and lower ends of the fixed roller (1). Anti-slip rubber rings (5) are sleeved on the outside of the support rods (4). The connecting frame (3) includes a connecting rod (31), a limiting collar (32), a insert (33), a rotating block (34), and a friction plate (35). The connecting rod (31) is connected to the frame of the external wrapping machine. The other end of the connecting rod (31) is equipped with a limiting collar (32). The limiting collar (32) can be sleeved on the outside of the anti-slip rubber ring (5). The insert (33) is inserted into the side wall of the limiting collar (32). The rotating block (34) is rotatably installed inside the insert (33). The friction plate (35) is installed on the side wall of the rotating block (34). The friction plate (35) can fit against the side wall of the anti-slip rubber ring (5).

2. The anti-slip stretch film according to claim 1, characterized in that: The connecting rod (31) includes a rod body (311), a nut (312), and a threaded sleeve (313). The rod body (311) is installed on the side wall of the limiting collar (32). The outer side of the rod body (311) is provided with an external thread. The nut (312) is installed on the outer side of the rod body (311) by rotating the thread. The threaded sleeve (313) is installed on the side wall of the nut (312). The threaded sleeve (313) can be screwed into the frame of the external wrapping machine.

3. The anti-slip stretch film according to claim 1, characterized in that: The friction pad (35) includes a telescopic rod (351), a spring (352), a base plate (353), and anti-slip texture (354). One end of the telescopic rod (351) is installed on the side wall of the rotating block (34), and the other end of the telescopic rod (351) is installed on the base plate (353). The side wall of the base plate (353) is provided with anti-slip texture (354). The base plate (353) can fit against the side wall of the anti-slip rubber ring (5). The spring (352) is sleeved on the outside of the telescopic rod (351). One end of the spring (352) fits against the side wall of the rotating block (34), and the other end fits against the side wall of the base plate (353).

4. The anti-slip stretch film according to claim 1, characterized in that: The outer peripheral wall of the rotating block (34) is provided with at least two sets of positioning slots (6), and the side wall of the insert (33) is equipped with an elastic positioning pin (7) that cooperates with the positioning slot (6). The elastic positioning pin (7) can be inserted into the positioning slot (6).

5. The anti-slip stretch film according to claim 1, characterized in that: The anti-slip rubber ring (5) is a split structure, including at least two rubber ring splits (51). Bolts (52) are inserted into the side walls of the rubber ring splits (51). The side walls of the support rod (4) are provided with threaded holes (53) that cooperate with the bolts (52). The bolts (52) are screwed into the threaded holes (53).

6. The anti-slip stretch film according to claim 5, characterized in that: A pressure ring (54) is fitted on the outside of the bolt (52), and the pressure ring (54) can be pressed against the side wall of the rubber ring split (51).

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