A plastic bag raw material fixing structure

Abstract

This utility model belongs to the field of winding technology, specifically relating to a plastic bag material fixing structure for clamping around a winding roller. It includes: a first side arm and a second side arm arranged opposite each other, and a top arm connecting the first and second side arms. The second side arm has the same structure as the first side arm, including an upper arm portion and a lower arm portion, and a clamping portion protruding outwards between the upper and lower arm portions. The maximum distance between the clamping portions of the second and first side arms is not greater than the outer diameter of the winding roller, so as to generate a radial clamping force around the winding roller. This utility model clamps the material around the winding roller with the clamping portion, thereby causing the first and second side arms to extend radially around the winding roller, blocking axial movement of the roll material and preventing uneven winding due to roll material deviation.

Description

Technical Field

[0001] This utility model belongs to the field of winding technology, specifically relating to a plastic bag raw material fixing structure. Background Technology

[0002] In the production of plastic bags, the raw plastic bag roll needs to be unwound, and then produced into a complete plastic bag through processes such as unwinding, hot pressing, and rewinding.

[0003] In the winding or unwinding process, winding rollers are needed to wind and unwind the rolled material. For example, an overload slippage mechanism with announcement number CN117775808A includes: a first...

[0004] The invention comprises a turntable, a second turntable, steel balls, and a clamping device. A first contact surface on the first turntable is provided with an annular slide rail for the steel balls to roll. The annular slide rail has spherical recesses. The second turntable has an axially penetrating slide rail. The second contact surface on the second turntable is pressed tightly against the first contact surface. The opening of the slide rail on the second contact surface aligns with the annular slide rail. A clamping device is provided within the slide rail to elastically clamp the steel balls, causing them to contact the annular slide rail. The overload slip mechanism provided by this invention uses steel balls as the force transmission component to solve the problems existing in the prior art. The first and second turntables do not rely on friction transmission, thus solving the problem of excessive heat generation at the contact surface between the first and second turntables. The steel balls are wear-resistant and tough; compared to the nylon friction pads used in the prior art, the steel balls are less prone to wear and do not shed debris, ensuring reliable transmission of the overload slip mechanism.

[0005] As the take-up roller gradually winds up the roll, the radial dimension of the roll gradually increases, making it prone to deviation, which leads to uneven winding of the roll and affects its use.

[0006] In view of this, the present invention provides a plastic bag raw material fixing structure to solve the above problems. Utility Model Content

[0007] To achieve the above objectives, the present invention provides the following technical solution: a plastic bag raw material fixing structure for clamping around the periphery of a take-up roller, comprising: a first side arm and a second side arm disposed opposite to each other, and a top arm connected between the first side arm and the second side arm;

[0008] The second side arm has the same structure as the first side arm, including an upper arm portion and a lower arm portion, and a clamping portion that protrudes outward between the upper arm portion and the lower arm portion. The maximum distance between the clamping portions of the second side arm and the first side arm is less than the outer diameter of the take-up roller, so as to generate a radial clamping force on the circumference of the take-up roller.

[0009] Preferably, the clamping portion is V-shaped and includes a first bending portion and a second bending portion for forming contact on the periphery of the take-up roller, wherein the ends of the first bending portion and the second bending portion are integrally connected to the upper arm portion and the lower arm portion, respectively.

[0010] Preferably, the distance between the first side arm and the second side arm gradually decreases towards both ends from the clamping portion.

[0011] Preferably, the end of the lower arm is a free end that bends outward.

[0012] Preferably, the end of the second side arm can be locked or separated from the end of the first side arm by a locking assembly.

[0013] Preferably, the locking assembly includes positioning members disposed on the same circumference of the ends of the second side arm and the first side arm, wherein a movable buckle is rotatably connected to any one of the positioning members, and the edge of the movable buckle has a locking slot, through which the movable buckle can engage with another positioning member to lock the ends of the second side arm and the first side arm together.

[0014] Preferably, the positioning element includes a columnar connecting portion, the size of which is adapted to the size of the engaging opening.

[0015] Preferably, the positioning element further includes a limiting part that is axially connected to the end of the connecting part and has a radial dimension larger than the radial dimension of the connecting part.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model can clamp the material on the periphery of the winding roller through the clamping part, so that the first side arm and the second side arm extend radially on the winding roller to block the movement of the material in the axial direction and prevent the material from deviating and causing uneven winding.

[0018] Secondly, by locking the ends of the first and second side arms with the locking assembly, not only can the upper and lower arm parts generate radial pressure on the clamping part, achieving a double force to increase the clamping force, but it can also effectively prevent separation caused by centrifugal force when the arm moves synchronously with the winding roller, thus improving the safety of use. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model;

[0021] Figure 2 This is a schematic diagram of the second side arm structure of Embodiment 1 of the present invention;

[0022] Figure 3 This is a schematic diagram of the clamping part structure according to Embodiment 1 of this utility model;

[0023] Figure 4 This is a schematic diagram of the present invention clamped with a take-up roller;

[0024] Figure 5 This is a three-dimensional structural diagram of Embodiment 2 of the present invention;

[0025] Figure 6 This is a schematic diagram of the locking structure of the locking component in Embodiment 2 of this utility model;

[0026] Figure 7 This is a schematic diagram of the locking component of this utility model;

[0027] Figure 8 This is a schematic diagram of the positioning component of this utility model;

[0028] Figure 9 This is a schematic diagram of the structure of the second embodiment of the present invention, which is clamped by the winding roller.

[0029] In the diagram: 11. Top arm; 12. First side arm; 13. Second side arm; 131. Upper arm; 132. Clamping part; 1321. First bending part; 1322. Second bending part; 133. Lower arm; 134. Free end; 2. Locking assembly; 21. Positioning component; 211. Connecting part; 212. Limiting part; 22. Movable buckle; 23. Locking opening. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example 1:

[0032] This utility model relates to a plastic bag raw material fixing structure, used to clamp the material around the circumference of a take-up roller to limit axial displacement of the roll. Figures 1-4As shown, it includes: a first side arm 12 and a second side arm 13 made of an elastic material (e.g., manganese steel, plastic, etc.) and arranged opposite each other, and a top arm 11 connecting the first side arm 12 and the second side arm 13; the second side arm 13 has the same structure as the first side arm 12, including an upper arm portion 131 and a lower arm portion 133, and a clamping portion 132 protruding outward between the upper arm portion 131 and the lower arm portion 133, the maximum distance between the clamping portion 132 of the second side arm 13 and the first side arm 12 is less than the outer diameter of the take-up roller, so as to generate a radial clamping force on the circumference of the take-up roller.

[0033] Specifically, such as Figure 3 As shown, the clamping part 132 is V-shaped and includes a first bending part 1321 and a second bending part 1322 for forming point contact or surface contact on the periphery of the take-up roller. The ends of the first bending part 1321 and the second bending part 1322 are integrally connected to the upper arm part 131 and the lower arm part 133, respectively, so that the fixing structure as a whole forms an inverted U-shape.

[0034] When using, such as Figure 4 As shown, the take-up roller is clamped between the first side arm 12 and the second side arm 13. The clamping force is used to clamp the periphery of the take-up roller and fix it. At this time, the inner surfaces of the first bending part 1321 and the second bending part 1322 form point contact or surface contact with the periphery of the take-up roller (point contact when the clamping part 132 is columnar, and surface contact when the clamping part 132 is flat strip). The upper arm part 131 and the lower arm part 133 extend roughly radially away from each other along the take-up roller, thereby restricting the axial movement of the roll material during take-up or unwinding, making it less prone to deviation during take-up or unwinding, and more uniform and stable.

[0035] Furthermore, in order to better clamp the take-up roller with the upper arm 131 and the lower arm 133, the distance between the first side arm 12 and the second side arm 13 gradually decreases from the clamping part 132 towards both ends, forming a diamond-like structure. The maximum distance of the diamond structure is the clamping space around the take-up roller, which can form four clamping positions around the take-up roller when clamping the take-up roller, so as to provide a more stable clamping force.

[0036] Furthermore, the lower arm 133 has an outwardly curved free end 134 at its end. By bending the free end 134 outward, when the fixing structure is clamped on the periphery of the take-up roller, it can slide with the periphery of the take-up roller, thereby facilitating the separation and opening of the lower arm 133, so as to clamp and fix it on the periphery of the take-up roller with less effort.

[0037] Example 2:

[0038] Figures 5-9The second embodiment of the present invention is shown, which differs from the first embodiment in that the ends of the second side arm 13 and the first side arm 12 can be locked or separated by the locking component 2, thereby realizing the connection and locking of the opening between the ends of the second side arm 13 and the first side arm 12, so as to improve the clamping force and prevent the fixed structure from detaching from the take-up roller.

[0039] Among them, such as Figure 7 As shown, the locking assembly 2 includes positioning members 21 disposed on the same circumference of the ends of the second side arm 13 and the first side arm 12. A movable buckle 22 is sleeved on any one of the positioning members 21. The movable buckle 22 can rotate on the positioning member 21. The edge of the movable buckle 22 has a locking opening 23. The locking opening 23 is generally "L" shaped. One of the "L"-shaped support openings connects to the edge of the movable buckle 22, and the other support opening extends to the end of the movable buckle 22. The movable buckle 22 can be engaged with another positioning member 21 through the locking opening 23 to lock the ends of the second side arm 13 and the first side arm 12 together.

[0040] Specifically, such as Figure 8 As shown, the positioning member 21 includes a columnar connecting part 211, the size of which is adapted to the size of the engaging opening 23. The positioning member 21 also includes a limiting part 212 that is axially connected to the end of the connecting part 211 and has a radial dimension larger than that of the connecting part 211.

[0041] In use, by rotating the movable buckle 22, the locking port 23 is engaged with the connecting part 211 of another positioning member 21. The first side arm 12 or the second side arm 13 is self-locked together by its own elastic rebound. After the ends of the first side arm 12 and the second side arm 13 are locked, the maximum distance between them will be further reduced, so as to form a stronger clamping force around the winding roller. At the same time, due to the locking connection of the ends of the first side arm 12 and the second side arm 13, the diamond-shaped edge formed by the entire fixed structure is surrounded together, making it less likely to fall off the winding roller inside, thus forming a more stable clamping and positioning.

[0042] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A plastic bag raw material fixing structure for clamping around the periphery of a take-up roller, characterized in that, include: The first side arm (12) and the second side arm (13) are arranged opposite to each other, and the top arm (11) is connected between the first side arm (12) and the second side arm (13). The second side arm (13) has the same structure as the first side arm (12), including an upper arm (131) and a lower arm (133), and a clamping part (132) that protrudes outward between the upper arm (131) and the lower arm (133). The maximum distance between the clamping part (132) of the second side arm (13) and the first side arm (12) is less than the outer diameter of the take-up roller, so as to generate a radial clamping force on the circumference of the take-up roller.

2. The plastic bag raw material fixing structure according to claim 1, characterized in that: The clamping part (132) is V-shaped and includes a first bending part (1321) and a second bending part (1322) for forming contact on the periphery of the take-up roller. The ends of the first bending part (1321) and the second bending part (1322) are integrally connected to the upper arm part (131) and the lower arm part (133), respectively.

3. The plastic bag raw material fixing structure according to claim 2, characterized in that: The distance between the first side arm (12) and the second side arm (13) gradually decreases towards both ends from the clamping part (132).

4. The plastic bag raw material fixing structure according to claim 3, characterized in that: The lower arm (133) ends in a free end (134) that bends outward.

5. A plastic bag raw material fixing structure according to any one of claims 1-4, characterized in that: The second side arm (13) can be locked or separated from the end of the first side arm (12) by a locking assembly (2).

6. The plastic bag raw material fixing structure according to claim 5, characterized in that: The locking assembly (2) includes a positioning member (21) disposed on the same circumference of the end of the second side arm (13) and the first side arm (12), wherein a movable buckle (22) is rotatably connected to any one of the positioning members (21), and a snap-fit ​​opening (23) is provided on the edge of the movable buckle (22). The movable buckle (22) can be engaged with another positioning member (21) through the snap-fit ​​opening (23) to lock the ends of the second side arm (13) and the first side arm (12) together.

7. The plastic bag raw material fixing structure according to claim 6, characterized in that: The positioning element (21) includes a columnar connecting part (211), the size of which is adapted to the size of the locking opening (23).

8. The plastic bag raw material fixing structure according to claim 7, characterized in that: The positioning member (21) further includes a limiting part (212) that is axially connected to the end of the connecting part (211) and has a radial dimension larger than that of the connecting part (211).

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