A film traction mechanism for a cling film wrapping machine

Abstract

The utility model discloses a film traction mechanism of preservative film packaging machine belongs to packaging machine technical field, specifically includes work table, one end fixed connection of work table has fixed clamping piece, and the other end sliding connection of work table has mobile clamping piece, the mobile clamping piece includes upper stand and lower stand, and the lower side sliding connection of upper stand has lower stand through connecting shaft, and the upper stand is connected with lower stand through compression spring, be provided with a plurality of installation groove for installing position magnetic block on the upper stand, be provided with a plurality of installation cavity for installing electromagnetic block on the lower stand, the cable is fixedly connected through fixing piece in the lower stand, the utility model discloses the mode of clamping of electromagnetic to preservative film can adapt to the preservative film of different thickness and material, avoid skidding and breakage, and moreover, the outgoing structure and protection structure of cable are optimized, effectively prevent the cable from being damaged in the movement process, reduce the equipment failure rate.

Description

Technical Field

[0001] This utility model belongs to the field of packaging machine technology, specifically relating to a film traction mechanism for a cling film packaging machine. Background Technology

[0002] A fresh film packaging machine is an automated or semi-automated packaging device. Its core function is to precisely cover, wrap, or seal the surface / exterior of an item with a plastic wrap (usually made of PVC, PE, PVDC, etc.) through a mechanical structure to form a tight packaging layer. It is widely used in food, fresh produce, pharmaceuticals, industrial parts and other fields to achieve the purpose of preservation, dust prevention, moisture prevention, fixation or extension of shelf life.

[0003] Chinese utility model patent application number CN202422808305.7 discloses a film feeding mechanism for a fully automatic fresh food packaging machine, including a worktable. A slide rail is provided in the middle of the worktable, and a movable clamping component for holding the cling film is slidably connected to the slide rail. The worktable is provided with a moving drive component to move the movable clamping component. A fixed clamping component is provided at one end of the slide rail on the worktable. A fixed shaft is fixedly connected to the top of the worktable. The movable clamping component includes a first positioning plate, an electromagnetic block rotatably connected to the first positioning plate, and a positioning magnetic block is installed on the top of the first positioning plate. This utility model has the advantage of clamping and feeding the cling film.

[0004] In the prior art, the moving clamping component moves synchronously with the cable connected to the electromagnetic block during its movement. However, the cable lacks effective fixation and protection, and is easily pulled or worn during the frequent movement of the moving clamping component, leading to equipment failure. Therefore, it is necessary to provide a film traction mechanism for a food preservation film packaging machine to solve the above-mentioned technical problems. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides a film traction mechanism for a food preservation film packaging machine. This mechanism is adaptable to food preservation films of different thicknesses and materials, preventing slippage and damage. Furthermore, it optimizes the cable lead-out and protection structures, effectively preventing cable damage during operation and reducing equipment failure rates.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a film traction mechanism for a food preservation film packaging machine, comprising a worktable, a fixed clamping member fixedly connected to one end of the worktable, and a movable clamping member slidably connected to the other end of the worktable;

[0007] The movable clamping component includes an upper frame and a lower frame. The lower frame is slidably connected to the lower part of the upper frame via a connecting shaft. The upper frame and the lower frame are connected by a compression spring. The upper frame is provided with multiple mounting slots for mounting positioning magnetic blocks, and the lower frame is provided with multiple mounting cavities for mounting electromagnetic blocks. A cable is fixedly connected inside the lower frame by a fastener. The cable is electrically connected to multiple electromagnetic blocks. The free end of the cable passes through a wire groove provided on the lower frame and is connected to the PLC controller through a waterproof terminal block.

[0008] Preferably, there are two sets of movable clamping components, and both sets of movable clamping components are slidably connected to the worktable via slide rods.

[0009] Preferably, one end of the upper frame is slidably sleeved on one of the slide rods via a linear bearing, and the other end of the upper frame is fixedly connected to a limiting block, which is slidably connected to another slide rod.

[0010] Preferably, a drive assembly is provided on the worktable below the slide bar for driving the movable clamping component to move independently along the slide bar. The drive assembly includes a drive motor and two pulleys. The drive motor is fixedly connected to the worktable, and the output shaft of the drive motor is drivenly connected to one of the pulleys. The two pulleys are rotatably connected to the worktable and are drivenly connected by a synchronous belt. A pressure plate is fixedly connected to the upper edge of the synchronous belt, and the pressure plate is fixedly connected to a linear bearing.

[0011] Preferably, one core of the cable is connected in parallel with the positive conductors of the plurality of electromagnetic blocks via a crimp terminal, and the other core of the cable is connected in parallel with the negative conductors of the plurality of electromagnetic blocks via a crimp terminal.

[0012] Preferably, the wire channel is disposed on the side wall of one end of the lower frame, the end of the wire channel away from the lower frame end has an arc-shaped structure, and an anti-wear pad is fixedly connected to the inner wall of the wire channel.

[0013] Preferably, the fastener is a nylon strip or a Velcro strip.

[0014] Preferably, a clamping plate is fixedly connected to the linear bearing for pressing and fixing the cable onto the linear bearing.

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model uses a movable clamping component to hold the plastic wrap with electromagnetic force, which can adapt to plastic wrap of different thicknesses and materials, and avoid slippage and damage.

[0016] 2. This utility model optimizes the cable lead-out structure and protection structure by setting the wire groove, effectively preventing cable damage during movement and reducing equipment failure rate. Attached Figure Description

[0017] 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: Figure 1 This is a three-dimensional cross-sectional structural diagram of the present invention; Figure 2 This is a side view sectional structural diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the movable clamping component of this utility model; Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle; In the diagram: 1. Workbench; 2. Upper frame; 3. Lower frame; 4. Connecting shaft; 5. Compression spring; 6. Mounting groove; 7. Mounting cavity; 8. Cable; 9. Wire groove; 10. Slide rod; 11. Linear bearing; 12. Limiting block; 13. Synchronous belt; 14. Wire clamp. Detailed Implementation

[0018] 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.

[0019] Example Please see Figure 1-4 This embodiment provides the following technical solution: a film traction mechanism for a food preservation film packaging machine, including a worktable 1. A fixed clamping component is fixedly connected to the rear end of the worktable 1, and a movable clamping component is slidably connected to the other end of the worktable 1. Two sets of movable clamping components are provided, and both sets of movable clamping components are slidably connected to the worktable 1 via slide rods 10. One end of the upper frame 2 is slidably sleeved on one of the slide rods 10 via a linear bearing 11. The other end of the upper frame 2 is fixedly connected to a limiting block 12, which is slidably connected to another slide rod 10. The linear bearings 11 and limiting blocks 12 on the two sets of movable clamping components are staggered. By setting two sets of movable clamping components, the two sets of movable clamping components can work alternately, which greatly improves the traction efficiency and meets the needs of mass production.

[0020] The movable clamping component includes an upper frame 2 and a lower frame 3. The lower frame 3 is slidably connected to the lower part of the upper frame 2 via a connecting shaft 4. The upper frame 2 and the lower frame 3 are connected by a compression spring 5. In some embodiments, there are two connecting shafts 4, which are symmetrically arranged at both ends of the upper frame 2, and the top end of the connecting shaft 4 is fixedly connected to the upper frame 2. The connecting shaft 4 passes through the movable groove provided on the lower frame 3. There are two compression springs 5, which are symmetrically arranged between the two connecting shafts 4. The connecting shafts 4 limit the vertical movement of the lower frame 3, and the compression springs 5 ​​provide a buffering effect to avoid damage to the film material during clamping and ensure packaging quality.

[0021] The upper shelf 2 is provided with multiple mounting slots 6 for installing positioning magnetic blocks, and the lower shelf 3 is provided with multiple mounting cavities 7 for installing electromagnetic blocks. The mounting cavities 7 are set one-to-one with the mounting slots 6. By using the positioning magnetic blocks and electromagnetic blocks, the plastic wrap is clamped by electromagnetic force, which can accommodate plastic wrap of different thicknesses and materials and avoid slipping and damage.

[0022] Cable 8 is fixedly connected to the lower frame 3 by fasteners. Cable 8 is electrically connected to multiple electromagnetic blocks. One core of cable 8 is connected in parallel with the positive wires of multiple electromagnetic blocks through a crimp terminal, and the other core of cable 8 is connected in parallel with the negative wires of multiple electromagnetic blocks through a crimp terminal.

[0023] The fastener is a nylon tape or a Velcro tape. In some embodiments, after the free end of the cable 8 passes through the conductor groove 9 and exits the lower frame 3, the cable 8 is tied to the lower frame 3 with the help of the nylon tape or Velcro tape, so that while ensuring the power supply of the electromagnetic block, it can move with the moving clamp.

[0024] The free end of cable 8 passes through the wire groove 9 provided on the lower frame 3 and is connected to the PLC controller through a waterproof terminal block. In some embodiments, the wire groove 9 is provided on the side wall of one end of the lower frame 3. The end of the wire groove 9 away from the end of the lower frame 3 has an arc-shaped structure. An anti-wear pad is fixedly connected to the inner wall of the wire groove 9. By providing the wire groove 9, the traditional design of cable 8 directly passing out from the end of the lower frame 3 is replaced, thereby overcoming the problem that cable 8 is prone to wear with the edge of the end of the lower frame 3. It also reduces the bending degree of cable 8 on the lower frame 3, optimizes the cable 8 lead-out structure and protection structure, effectively prevents cable 8 from being damaged during movement, and reduces the equipment failure rate.

[0025] A clamping piece 14 is fixedly connected to the linear bearing 11 to press and fix the cable 8 to the linear bearing 11. The clamping piece 14 further restricts the position of the cable 8 on the linear bearing 11, thereby improving the stability of the cable 8 on the lower frame 3 and further ensuring the service life of the cable 8.

[0026] A drive assembly is provided on the worktable 1 below the slide bar 10 to drive the movable clamping member to move independently along the slide bar 10. The drive assembly includes a drive motor and two pulleys. The drive motor is fixedly connected to the worktable 1, and the output shaft of the drive motor is drivenly connected to one of the pulleys. The two pulleys are rotatably connected to the worktable 1 and are drivenly connected by a synchronous belt 13. A pressure plate is fixedly connected to the upper edge of the synchronous belt 13, and the pressure plate is fixedly connected to the linear bearing 11. In some embodiments, the two slide bars 10 are symmetrically arranged on the worktable 1. According to the work requirements, by starting the drive motor below the corresponding slide bar 10, the synchronous belt 13 moves and drives the corresponding linear bearing 11 and the upper frame 2 to move closer to or away from the fixed clamping member, so as to achieve the purpose of traction of the safety film.

[0027] The working principle of this utility model is as follows: the plastic wrap passes through the through groove of the fixed clamping member, and the two sets of movable clamping members are respectively located at the initial position close to the fixed clamping member and the working position far away from the fixed clamping member; The PLC controller controls the electromagnetic blocks of one of the moving clamping parts to be energized, generating magnetic force to attract the positioning magnetic blocks, which drives the lower frame 3 to move upward and squeeze the compression spring 5, so that the plastic wrap is clamped between the positioning magnetic block and the silicone layer of the electromagnetic block. The drive motor starts and drives the moving clamp along the slide bar 10 assembly to the other end of the worktable 1 via the synchronous belt 13, pulling the plastic wrap to the preset length (controlled by the motor encoder). Once the position is reached, the electromagnetic block is de-energized, and the compression spring 5 pushes the lower frame 3 to reset and release the membrane material; the drive motor reverses, driving the moving clamping component back to its initial position; When the previous set of moving clamping components resets, the other set of moving clamping components simultaneously completes the clamping, traction, and release actions. The two sets of moving clamping components work alternately to achieve continuous film feeding.

[0028] 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 film traction mechanism for a food preservation film packaging machine, characterized in that: Includes a workbench (1), one end of which is fixedly connected to a fixed clamping member, and the other end of which is slidably connected to a movable clamping member; The movable clamping component includes an upper frame (2) and a lower frame (3). The lower frame (3) is slidably connected to the lower part of the upper frame (2) via a connecting shaft (4). The upper frame (2) and the lower frame (3) are connected by a compression spring (5). The upper frame (2) is provided with multiple mounting slots (6) for mounting positioning magnetic blocks, and the lower frame (3) is provided with multiple mounting cavities (7) for mounting electromagnetic blocks. A cable (8) is fixedly connected inside the lower frame (3) by a fastener. The cable (8) is electrically connected to a plurality of electromagnetic blocks. The free end of the cable (8) passes through the wire groove (9) provided on the lower frame (3) and is connected to the PLC controller through a waterproof terminal block.

2. The film traction mechanism of a food preservation film packaging machine according to claim 1, characterized in that: The movable clamping components are provided in two sets, and both sets of movable clamping components are slidably connected to the worktable (1) via slide rods (10).

3. The film traction mechanism of a food preservation film packaging machine according to claim 2, characterized in that: One end of the upper frame (2) is slidably sleeved on one of the slide rods (10) via a linear bearing (11), and the other end of the upper frame (2) is fixedly connected to a limiting block (12), which is slidably connected to another slide rod (10).

4. The film traction mechanism of a food preservation film packaging machine according to claim 3, characterized in that: A drive assembly is provided on the worktable (1) below the slide bar (10) for driving the moving clamp to move independently along the slide bar (10). The drive assembly includes a drive motor and two pulleys. The drive motor is fixedly connected to the worktable (1). The output shaft of the drive motor is drivenly connected to one of the pulleys. The two pulleys are rotatably connected to the worktable (1). The two pulleys are drivenly connected through a synchronous belt (13). A pressure plate is fixedly connected to the upper edge of the synchronous belt (13). The pressure plate is fixedly connected to a linear bearing (11).

5. The film traction mechanism of a food preservation film packaging machine according to claim 3, characterized in that: One core of the cable (8) is connected in parallel with the positive conductors of the plurality of electromagnetic blocks through a crimp terminal, and the other core of the cable (8) is connected in parallel with the negative conductors of the plurality of electromagnetic blocks through a crimp terminal.

6. The film traction mechanism of a food preservation film packaging machine according to claim 1, characterized in that: The wire groove (9) is set on the side wall of one end of the lower frame (3). The end of the wire groove (9) away from the end of the lower frame (3) is an arc-shaped structure. An anti-wear pad is fixedly connected to the inner wall of the wire groove (9).

7. The film traction mechanism of a food preservation film packaging machine according to claim 1, characterized in that: The fastener is a nylon strip or a Velcro strip.

8. The film traction mechanism of a food preservation film packaging machine according to claim 3, characterized in that: A clamping plate (14) is fixedly connected to the linear bearing (11) for pressing and fixing the cable (8) onto the linear bearing (11).

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