A film clamping assembly, a film clamping cutting mechanism and a film winding machine

Abstract

The utility model relates to film wrapping machine technical field, specifically disclose a film clamping assembly, including push board and pressure piece, push board fixed mounting is located at least two parallel arrangements'sliding rod, pressure piece is equipped with elastic part between frame, and pressure piece is located between two sliding rods, and the pressure surface with push board's end face opposite arrangement is had with pressure piece, and elastic part gives pressure piece the force towards push board, push board can be driven under the sliding rod to move towards pressure piece to cooperate with the pressure surface and hold film. Film clamping cutting mechanism includes the cutter of installation on the frame, still include the film clamping assembly. A kind of film wrapping machine, including rotating device and film clamping cutting mechanism installed on the frame, rotating device is used to drive film to be wound around object to be wound. The clamping of the scheme is more stable and reliable, stress balance, cutting efficiency is high and structure is compact, to solve the film wrapping machine existing film problem and the problem of poor stress balance of sliding rod when clamping film, insufficient clamping reliability.

Description

Technical Field

[0001] This utility model relates to the field of wrapping machine technology, specifically to a film clamping assembly, a film clamping and cutting mechanism, and a wrapping machine. Background Technology

[0002] In modern logistics and industrial production, it is often necessary to wrap objects with stretch film to protect them from scratches, contamination, or moisture during transportation and storage.

[0003] The basic working principle of an automatic wrapping machine is as follows: the workpiece to be wrapped (such as a plate) is placed in a rotatable working chamber, and a rotating device drives the film to rotate circumferentially around the workpiece, thereby wrapping the film around the surface of the workpiece. After wrapping, the film needs to be cut by a cutting mechanism to prepare for the packaging of the next workpiece.

[0004] In the prior art, such as the automatic wrapping machine disclosed in patent publication number CN218463934U, the cutting mechanism includes a cutting blade and a clamping mechanism. This clamping mechanism has a slide rod, a first clamping member, and a second clamping member. The first clamping member is fixed to one end of the slide rod, and the second clamping member is movably sleeved on the slide rod and connected to a mounting bracket via a limiting guide post and a reset elastic member. During operation, the slide rod drives the first clamping member to move, squeezing the film onto the cutting blade for cutting. Simultaneously, the first and second clamping members cooperate to clamp the end of the film connected to the film roll.

[0005] However, this existing technical solution has the following shortcomings: First, since both the first clamping member and the second clamping member are mounted on the same slide bar, it is easy for the film to get stuck between the slide bar and the second clamping member when the film is pushed against the second clamping member by the first clamping member. This is because there is a gap between the second clamping member and the slide bar.

[0006] Second, both the first and second clamping components are mounted on the same slide rod, and the force application point of the clamping action is located on one side of the slide rod. This asymmetrical force structure is prone to causing the slide rod to bear eccentric torque under long-term, high-frequency operation, resulting in jamming or wear, which affects the reliability and lifespan of the clamping action. Utility Model Content

[0007] The present invention aims to provide a film clamping assembly to solve the problems of film jamming in current wrapping machines, as well as the problems of poor force balance of the slide bar and insufficient clamping reliability when clamping film.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: A film clamping assembly includes a pusher plate and a pressing member. The pusher plate is fixedly mounted on at least two parallel sliding rods. An elastic member is provided between the pressing member and the frame. The pressing member is located between the two sliding rods, and the pressing surface on the pressing member is opposite to the end face of the pusher plate. The elastic member applies a force to the pressing member toward the pusher plate. The pusher plate can move toward the pressing member under the drive of the sliding rods to cooperate with the pressing surface to clamp the film.

[0009] The principle and advantages of this solution are as follows: This solution constructs a force-bearing framework between the two slide rods by fixing the push plate to at least two parallel slide rods and cooperating with the pressing member located between the slide rods and abutted by an elastic element. On the one hand, because the pressing member is located between the two slide rods, the film is clamped between the pressing surface of the pressing member and the end face of the push plate, thus avoiding the film jamming and clamping problems of the prior art. On the other hand, when the slide rod drives the push plate to move towards the pressing surface of the pressing member and clamps the film together with the pressing surface, the force on the entire assembly is distributed to all slide rods, effectively avoiding the eccentric torque generated by the unilateral force on the slide rods in the prior art, which helps to improve the balance of force on the slide rods, thereby improving the reliability of the film clamping and the life of the film clamping assembly under long-term, high-frequency operation.

[0010] Preferably, as an improvement, the pressing member is a pressing wheel, the axial end face of which constitutes the pressing surface.

[0011] Preferably, as an improvement, the outer circumferential surface of the pressure roller is provided with an anti-slip structure to increase friction, so that the operator can apply force to tighten or adjust, thereby improving the convenience of assembly and maintenance.

[0012] Preferably, as an improvement, the anti-slip structure is any one of knurling, mesh texture, raised dots, raised strips, or rubber sleeve.

[0013] Preferably, as an improvement, the pressing member is connected to a guide rod, which is parallel to the sliding rod; the guide rod is slidably connected to the frame or fixedly installed on the frame but the guide rod is an axially telescopic rod; the elastic member is sleeved on the guide rod.

[0014] This solution ensures that the pressing component always moves along a predetermined straight path during the compression and resetting process by setting parallel guide rods and providing guidance for the compression of the elastic element. This effectively prevents skewing and jamming, thereby ensuring the stability of the clamping force and the reliability of the component's operation.

[0015] Preferably, as an improvement, it also includes a drive motor for driving the slide bar to perform linear reciprocating motion, so as to automate the driving of the slide bar.

[0016] This utility model also provides a film clamping and cutting mechanism, including a cutter mounted on a frame, and the aforementioned film clamping assembly.

[0017] This solution integrates the clamping assembly with the cutter, forming a compact mechanism that combines clamping and cutting functions. This simplifies the layout, facilitates the miniaturization of the mechanism, and ensures the continuity and coordination of clamping and cutting actions.

[0018] Preferably, as an improvement, the cutter is located on the side of the pressing member and between two adjacent sliding rods; the push plate has a clearance groove corresponding to the position of the cutter, so that the push plate can pull the film close to the cutter to complete the cutting while completing the clamping, realizing the coordination and seamless connection of the clamping and cutting actions in space and time; and the cutter is located between two sliding rods, making the cutting faster and less strenuous.

[0019] Preferably, as an improvement, the cutter is a V-shaped cutter, which further facilitates fast and labor-saving cutting.

[0020] This utility model also provides a wrapping machine, including a rotating device mounted on a frame, the rotating device being used to drive the film to wrap the object to be wrapped, and also including the aforementioned film clamping and cutting mechanism.

[0021] This solution enables the wrapping machine to automatically and reliably cut and clamp the film head after completing one wrapping cycle, creating conditions for the rapid and smooth start of the next wrapping cycle, thereby improving the automation level and operational continuity of the whole machine. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the membrane cutting mechanism according to Embodiment 1 of this utility model.

[0023] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure after rotation.

[0024] Figure 3 for Figure 1 Front view.

[0025] Figure 4 The three-dimensional structural diagram of the film wrapping machine in Embodiment 2 of this utility model only shows the frame, film clamping and cutting mechanism, and film roll placement structure on the rotating device.

[0026] Figure 5 for Figure 4 A schematic diagram of the three-dimensional structure after rotation.

[0027] The reference numerals in the accompanying drawings include: frame 100, film clamping assembly 10, push plate 11, clearance groove 111, pressing member 12, slide bar 13, connecting plate 14, elastic member 15, drive motor 16, slider 16a, cutter 20, and inductive switch 30. Detailed Implementation

[0028] The following detailed description illustrates the specific implementation method: Example 1 Combination Figures 1 to 3 A film clamping and cutting mechanism includes a cutter 20 mounted on a frame 100 and a film clamping assembly 10 for clamping a film, wherein the cutter 20 is a V-shaped cutter 20.

[0029] The film clamping assembly 10 includes a push plate 11 and a pressing member 12. The push plate 11 is fixedly mounted on at least two parallel sliding rods 13. In this embodiment, there are two sliding rods 13, both of which pass through the frame 100 and are fixedly connected at the end away from the push plate 11 by a connecting plate 14. An elastic member 15 is provided between the pressing member 12 and the frame 100. In this embodiment, the elastic member 15 is a spring 15.

[0030] The pressing member 12 is located between the two sliding rods 13, and the pressing surface on the pressing member 12 is opposite to and parallel to the end face of the push plate 11; the elastic member 15 provides a pre-tightening force to the pressing member 12 toward the push plate 11. The push plate 11 can move toward the pressing member 12 under the drive of the sliding rods 13, so that the end face of the push plate 11 and the pressing surface cooperate to clamp the film.

[0031] The pressing member 12 is a pressing wheel 12, and its axial end face forms a pressing surface.

[0032] To ensure that the pressure roller 12 always moves along a predetermined straight path during the pressing and resetting process of the push plate 11, and to prevent skewing and jamming, a guide rod is fixedly connected to the side of the pressure roller 12 away from the pressure surface, and the guide rod is parallel to the slide rod 13.

[0033] The guide rod is slidably connected to the frame 100; or, the guide rod is fixedly installed on the frame 100, but it is itself an axially telescopic rod structure; the attached drawings of this embodiment show the form in which the guide rod is slidably connected to the frame 100 as an example.

[0034] Spring 15 is sleeved on the guide rod, and spring 15 provides force to the pressure wheel 12 toward the push plate 11.

[0035] To facilitate the disassembly, assembly, or adjustment of the pressure roller 12 by the operator, an anti-slip structure for increasing friction is provided on the outer circumferential surface of the pressure roller 12. The anti-slip structure can be any one of knurling, mesh texture, raised dots, raised strips, or rubber sleeve. In this embodiment, strip knurling is preferred.

[0036] The membrane clamping assembly 10 also includes a drive motor 16 for driving the slide bar 13 to perform linear reciprocating motion. In this embodiment, the drive motor 16 is a ball screw, and the slider 16a at the output end of the ball screw is fixedly connected to the connecting plate 14. A sensor switch 30 for limiting the travel of the slide bar 13 is also installed on the frame 100. After the sensor switch 30 senses that the connecting plate 14 has reached its travel position, it controls the drive motor 16 to stop retracting through the controller to avoid the push plate 11 excessively squeezing the pressure roller 12.

[0037] In this embodiment, the end face area of ​​the push plate 11 facing the pressing surface is much larger than the pressing surface area of ​​the pressing wheel 12, and the projection of the pressing surface of the pressing wheel 12 onto the push plate 11 is almost completely within the end face of the push plate 11.

[0038] The cutter 20 is located on the side of the pressure roller 12 and between two adjacent slide rods 13; the push plate 11 is machined with a clearance groove 111 corresponding to the position of the cutter 20.

[0039] In this embodiment, an elastic floating pressure roller 12 is positioned between two slide bars 13. On one hand, this allows the clamped film to be held between the slide bars 13 by the pressure surface of the pressure roller 12 and the end face of the push plate 11, thus avoiding the film jamming and clamping problems of the prior art. On the other hand, the placement of the pressure roller 12 between the two slide bars 13 also makes the force on the push plate 11 and the slide bars 13 more uniform, especially on the slide bars 13, thereby helping to ensure the stability of the clamping action and reducing the probability of jamming and wear of the slide bars 13 under long-term high-frequency use. At the same time, combined with the precise constraint of the guide rod on the movement path of the pressure roller 12, the clamping force can be applied vertically to the film, avoiding the problem of insecure clamping caused by the skewness of the pressure roller 12, and further improving the reliability of clamping.

[0040] The V-shaped cutter 20 is positioned between a slide bar 13 and a pressure roller 12, so that the push plate 11 can naturally tension the film locally between the pressure roller 12 and the adjacent slide bar 13 during the clamping process, creating a relatively taut area for cutting, and achieving labor-saving and efficient fast cutting under the V-shaped cutter.

[0041] Example 2 Combination Figure 4 and Figure 5 A film wrapping machine includes a rotating device 200 mounted on a frame 100, the rotating device 200 being used to drive the film to wrap the object to be wrapped, and also includes a film clamping and cutting mechanism as in Embodiment 1.

[0042] This embodiment enables the wrapping machine to automatically and reliably cut and clamp the film head after completing one wrapping cycle, creating conditions for the rapid and smooth start of the next wrapping cycle, thereby improving the automation level and operational continuity of the whole machine.

[0043] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A film clamping assembly comprising a push plate and a pressing piece, the push plate being fixedly installed on at least two parallel slide rods; the pressing piece being provided with an elastic member between the pressing piece and a machine frame, characterized in that: The pressing member is located between two sliding rods, and the pressing surface on the pressing member is opposite to the end face of the push plate. The elastic member applies a force to the pressing member toward the push plate. The push plate can move toward the pressing member under the drive of the sliding rods to cooperate with the pressing surface to clamp the film.

2. A film clamping assembly according to claim 1, wherein: The pressing component is a pressing wheel, and its axial end face forms the pressing surface.

3. A film clamping assembly according to claim 2, wherein: The outer circumferential surface of the pressure wheel is provided with an anti-slip structure to increase friction.

4. A film clamping assembly as claimed in claim 3, wherein: The anti-slip structure is any one of knurling, mesh texture, raised dots, raised strips, or rubber sleeve.

5. The film-attaching assembly of claim 1, wherein: The pressing component is connected to a guide rod, which is parallel to the sliding rod. The guide rod is slidably connected to the frame or fixedly installed on the frame, but the guide rod is an axially telescopic rod. The elastic component is sleeved on the guide rod.

6. A membrane clamping assembly according to claim 1, characterized in that: It also includes a drive mechanism for driving the slide bar to perform linear reciprocating motion.

7. A film clamping cutting mechanism comprising a cutting knife installed on a frame, characterized in that: It also includes the membrane assembly according to any one of claims 1 to 6.

8. A film-attaching cutting mechanism according to claim 7, characterized by: The cutter is located on the side of the pressing member and between two adjacent slide rods; the push plate has a clearance groove corresponding to the position of the cutter.

9. A film-attaching cutting mechanism according to claim 7, wherein: The cutter is a V-shaped cutter.

10. A film winding machine comprising a rotating device mounted on a frame for winding a film around an object to be wound, characterized in that: It also includes the membrane cutting mechanism as described in claim 7.

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