A traction device for stretch film production

Abstract

This utility model relates to the field of stretch film production technology, specifically to a traction device for stretch film production. It includes a support frame and a traction roller rotatably connected to the support frame via a rotating shaft. The outer wall of the traction roller is provided with a positioning component, which includes a movable block. A movable groove is formed along the axial direction on the outer wall of the traction roller. This utility model allows the movable block and push plate to automatically approach the stretch film under the action of a spring strip and a push spring, adapting to film materials of different thicknesses and ensuring the stretch film maintains a stable position during traction. When it is necessary to adjust the position of the push plate or retract it, the cooperation of a hanging block and a fixed block retracts and locks the push plate, while the positioning component also retracts smoothly, avoiding interference with the stretch film traction process. This effectively improves the flexibility and convenience of the device, ensuring efficient and stable stretch film production traction.

Description

Technical Field

[0001] This utility model relates to the field of stretch film production technology, and specifically to a traction device for stretch film production. Background Technology

[0002] In fields such as the packaging and protection of related products with stretch film, the traction device plays a key role. It ensures that the stretch film is wrapped evenly and stably on the items. To meet the needs of efficient stretch film production, the traction device for stretch film production is indispensable.

[0003] Traditional drive rollers are commonly used in stretch film production lines. When in use, they rely on an external power system to drive the drive roller to rotate. The stretch film contacts the surface of the drive roller and is pulled forward under the action of friction, thus realizing the basic production traction function.

[0004] However, in actual production, the traction effect of traditional drive rollers is significantly insufficient. When the drive rollers drive the stretch film for winding, due to the lack of an effective positioning mechanism, the stretch film is prone to sagging under gravity, causing the film to detach from the roller surface, severely affecting the traction effect and winding quality. Furthermore, this traditional device cannot automatically adjust the clamping force according to different film thicknesses, easily leading to insufficient traction or overstretching when encountering films of uneven thickness. More importantly, its positioning components are fixed and cannot be fully retracted when not in use. The protruding parts not only interfere with the normal traction process but may also damage the film surface. These problems severely restrict the improvement of production efficiency and product quality. Therefore, a traction device for stretch film production is proposed to solve the above problems. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a traction device for the production of stretch film, which can effectively solve the problems of the lack of an effective positioning mechanism and the inability to fully retract when not in use when the transmission roller drives the stretch film for winding operations. The protruding parts not only interfere with the normal traction process, but may also damage the surface of the film material.

[0006] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a traction device for stretch film production, comprising: A support frame and a traction roller rotatably connected to the support frame via a rotating shaft, wherein the outer wall of the traction roller is provided with a positioning assembly, the positioning assembly comprising: The movable block has a movable groove on the outer wall of the traction roller along the axial direction. A slider is fixedly installed on the outer wall of the movable block and is movably engaged in the movable groove. A spring strip is fixedly installed in the inner cavity of the movable groove. The other end of the spring strip is fixedly connected to the slider. In its natural state, the spring strip pushes the slider to move towards the central axis of the traction roller. The push plate is movably inserted into a groove on the outer wall of the movable block and moves radially along the groove.

[0007] Preferably, the movable block has a sliding groove inside, and a guide rod is fixedly installed on the inner wall of the sliding groove. A guide block is movably sleeved on the outer wall of the guide rod, and the guide block is fixedly connected to the push plate.

[0008] Preferably, the inner cavity of the chute is provided with a push spring, one end of which is fixed to the inner cavity of the chute, and the other end of which is fixedly connected to the guide block. In its natural state, the push spring pushes the guide block to move toward the midpoint of the traction roller.

[0009] Preferably, the outer wall of the movable block has a communication opening, and an extension block passing through the communication opening is fixedly connected to the outer side of the push plate, and an adjustment block is fixedly provided at the end of the extension block.

[0010] Preferably, the outer wall of the adjusting block is rotatably connected to a hanging block via a pin, and the outer wall of the hanging block has a groove.

[0011] Preferably, a fixing block is fixedly provided on the outer wall of the movable block, and the hanging block is hung on the fixing block.

[0012] The technical solution provided by this utility model has the following advantages compared with the known prior art: In this invention, by setting a moving block and a push plate to automatically approach the stretch film under the action of a spring strip and a push spring, and adapting to film materials of different thicknesses, the stretch film is ensured to maintain a stable position during the traction process. When it is necessary to adjust the position of the push plate or retract it, the push plate position is retracted and locked by the cooperation of the hanging block and the fixed block. At the same time, the positioning component can also be retracted smoothly, avoiding interference with the stretch film traction process. This effectively improves the flexibility and convenience of the device and ensures that the stretch film production traction work is carried out efficiently and stably. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 Here is a schematic diagram of the traction roller structure of this utility model: Figure 3 This is a partial sectional view of the traction roller structure of this utility model; Figure 4 This is a partial structural cross-sectional view of the movable block of this utility model; Figure 5 This is a schematic diagram of the push plate structure of this utility model; Figure 6 This is a schematic diagram of the hanging block structure of this utility model.

[0015] Reference numerals in the attached drawings: 1. Support frame; 2. Traction roller; 3. Moving block; 301. Moving groove; 302. Spring strip; 303. Sliding block; 4. Push plate; 401. Slide groove; 402. Guide rod; 403. Push spring; 404. Guide block; 405. Extension block; 406. Adjusting block; 407. Hanging block; 408. Fixing block; 409. Connecting port. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0017] The present invention will be further described below with reference to the embodiments.

[0018] See attached document Figure 1-6 A traction device for producing stretch film, comprising: The support frame 1 and the traction roller 2 rotatably connected to the support frame 1 via a rotating shaft provide stable support and mounting foundation for the traction roller 2 and other components, ensuring the stability of the entire device during operation. The traction roller 2 is the core component for stretch film traction; it rotates to move the stretch film, thus achieving the traction function during production. During stretch film production, the traction roller 2 rotates around the rotating shaft under the drive of the power unit. The stretch film contacts the surface of the traction roller 2 and is pulled forward as the traction roller 2 rotates. The outer wall of the traction roller 2 is provided with positioning components. Two sets of positioning components are symmetrically distributed on the outer wall of the traction roller 2 to limit the two sides of the stretch film. The positioning components include: The movable block 3 has a movable groove 301 axially formed on the outer wall of the traction roller 2. A slider 303 is fixedly mounted on the outer wall of the movable block 3, and the slider 303 is movably engaged in the movable groove 301. The movable groove 301 provides a track for the movement of the slider 303 and restricts the direction of movement of the slider 303, so that it can only move along the axial direction of the traction roller 2. A spring strip 302 is fixedly mounted in the inner cavity of the movable groove 301. The other end of the spring strip 302 is fixedly connected to the slider 303. In its natural state, the spring strip 302 pushes the slider 303 to move towards the central axis of the traction roller 2. The spring strip 302 provides elastic force, so that the slider 303 tends to move towards the central axis of the traction roller 2, thereby driving the movable block 3 closer to the wrapping film. When the wrapping film is placed on the traction roller 2, the elastic force of the spring strip 302 pushes the slider 303, and the slider 303 drives the movable block 3 to move towards the central axis of the traction roller 2, so that the movable block 3 is close to the wrapping film, in preparation for the subsequent positioning of the wrapping film. The push plate 4 is movably inserted into the groove on the outer wall of the moving block 3 and moves radially along the groove. The push plate 4 is in direct contact with the wrapping film. Depending on the thickness and position of the wrapping film, the push plate 4 moves radially within the groove of the moving block 3 to adapt to different wrapping film conditions and ensure that the wrapping film does not shift during the traction process.

[0019] The movable block 3 has a sliding groove 401 inside, and a guide rod 402 is fixedly installed on the inner wall of the sliding groove 401. A guide block 404 is movably sleeved on the outer wall of the guide rod 402, and the guide block 404 is fixedly connected to the push plate 4. The guide rod 402 guides the movement of the guide block 404, ensuring that the guide block 404 can only move along the direction of the guide rod 402, making the extension and retraction movement of the push plate 4 more stable.

[0020] A push spring 403 is provided in the inner cavity of the slide groove 401. One end of the push spring 403 is fixed to the inner cavity of the slide groove 401, and the other end of the push spring 403 is fixedly connected to the guide block 404. In the natural state, the push spring 403 pushes the guide block 404 to move towards the midpoint of the traction roller 2, providing power for the extension and retraction of the push plate 4. In the natural state, the push spring 403 pushes the guide block 404 to move towards the midpoint of the traction roller 2, thereby causing the push plate 4 to move towards the wrapping film. In use, the elastic force of the push spring 403 acts on the guide block 404, and the guide block 404 moves along the guide rod 402 towards the midpoint of the traction roller 2, driving the push plate 4 to move towards the wrapping film. When the push plate 4 contacts the wrapping film and cooperates with the force of the moving block 3, the push plate 4 generates a certain pressure, fixing the wrapping film on the surface of the traction roller 2.

[0021] The outer wall of the movable block 3 has a connecting port 409. An extension block 405 passing through the connecting port 409 is fixedly connected to the outside of the push plate 4. An adjustment block 406 is fixedly provided at the end of the extension block 405, so that the extension block 405 passes through the movable block 3, connects the push plate 4 and the external adjustment block 406, and provides an operating channel for adjusting the position of the push plate 4, so that the operator can adjust the push plate 4.

[0022] The outer wall of the adjusting block 406 is rotatably connected to the hanging block 407 via a pin, and the outer wall of the hanging block 407 has a groove to provide a fixing point for the hanging block 407, which cooperates with the hanging block 407 to lock the position of the push plate 4.

[0023] A fixed block 408 is fixedly installed on the outer wall of the movable block 3, and a hanging block 407 is sleeved on the fixed block 408. By rotating, the hanging block 407 can be sleeved on the fixed block 408 to fix the position of the push plate 4, preventing it from moving due to external force during production and ensuring positioning stability. In use, the operator pulls the hanging block 407 towards the fixed block 408, causing the push plate 4 to move inwards into the movable block 3, retracting it into the inner cavity of the movable block 3. The operator then rotates the hanging block 407, sleeved on the fixed block 408. At this time, the hanging block 407 and the fixed block 408 interact, restricting the movement of the adjusting block 406, thereby fixing the position of the push plate 4 and securing it within the inner cavity of the movable block 3, thus preventing the push plate 4 from affecting the traction of the wrapping film.

[0024] Working principle: When the stretch film is placed on the traction roller 2, the moving block 3 is pulled outward by the hanging block 407, which causes the push plate 4 to move outward from the moving groove 301. When the push plate 4 moves out of the moving groove 301, the pushing force of the pushing spring 403 pushes the guide block 404, which causes the push plate 4 to move outward from the moving block 3. At this time, the stretch film is located between the traction roller 2 and the push plate 4. The pushing force of the spring bar 302 pushes the slider 303, which in turn causes the moving block 3 to move closer to the central axis of the traction roller 2, which causes the push plate 4 to move closer to the stretch film, so that the push plate 4 firmly abuts against the stretch film and fixes it on the surface of the traction roller 2. When it is necessary to adjust the position of the push plate 4 or retract it, the operator operates the adjusting block 406 through the extension block 405 at the connecting port 409, pulls the hanging block 407 towards the fixed block 408, retracts the push plate 4 into the inner cavity of the moving block 3, and then rotates the hanging block 407 to hang it on the fixed block 408, locking the position of the push plate 4. At this time, the spring strip 302 pushes the moving block 3 to enter the moving groove 301, thereby retracting the positioning component and avoiding affecting the stretching film traction process.

[0025] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A traction device for winding film production, comprising a support frame (1) and a traction roller (2) connected to the support frame (1) by a rotating shaft, characterized in that, The outer wall of the traction roller (2) is provided with a positioning component, which includes: The movable block (3) has a movable groove (301) axially opened on the outer wall of the traction roller (2). A slider (303) is fixedly installed on the outer wall of the movable block (3), and the slider (303) is movably engaged in the movable groove (301). A spring strip (302) is fixedly installed in the inner cavity of the movable groove (301). The other end of the spring strip (302) is fixedly connected to the slider (303). In its natural state, the spring strip (302) pushes the slider (303) to move towards the central axis of the traction roller (2). The push plate (4) is movably inserted into the groove on the outer wall of the movable block (3) and moves radially along the groove.

2. The pulling device for a wrapping film production according to claim 1, characterized in that, The movable block (3) has a sliding groove (401) inside, and a guide rod (402) is fixedly installed on the inner wall of the sliding groove (401). A guide block (404) is movably sleeved on the outer wall of the guide rod (402), and the guide block (404) is fixedly connected to the push plate (4).

3. The take-up device for a wrapping film according to claim 2, characterized in that The inner cavity of the slide (401) is provided with a push spring (403). One end of the push spring (403) is fixed to the inner cavity of the slide (401), and the other end of the push spring (403) is fixedly connected to the guide block (404). In the natural state, the push spring (403) pushes the guide block (404) to move towards the midpoint of the traction roller (2).

4. The pulling device for a wrapping film production according to claim 1, characterized in that, The outer wall of the movable block (3) has a communication port (409), and the outer side of the push plate (4) is fixedly connected to an extension block (405) that passes through the communication port (409), and an adjustment block (406) is fixedly provided at the end of the extension block (405).

5. The take-up device for a wrapping film according to claim 4, characterized in that The outer wall of the adjusting block (406) is rotatably connected to the hanging block (407) via a pin, and the outer wall of the hanging block (407) is provided with a groove.

6. The pulling device for a wrapping film production according to claim 4, characterized in that, The outer wall of the movable block (3) is fixedly provided with a fixed block (408), and the hanging block (407) is hung on the fixed block (408).

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