Automatic film path tensioning device of multi-channel packaging machine

Abstract

The utility model provides a multi-pass packing machine film path automatic tensioning device, including film cylinder frame, roll changing device, film guide roller and first film guide roller, said film cylinder frame, roll changing device and first film guide roller are respectively installed on the film guide roller, the film cylinder is installed on the film cylinder frame, the film guide roller is also equipped with the regulating shaft and automatic tensioning mechanism, the regulating shaft is equipped with the automatic tensioning mechanism, and the automatic tensioning mechanism is equipped with the regulating shaft and the automatic tensioning mechanism. The adjusting shaft and the automatic tensioning mechanism are arranged between the roller changing device and the first film guiding roller, the automatic tensioning mechanism is arranged between the adjusting shaft and the first film guiding roller and comprises a tensioning support and a tensioning shaft, and the tensioning shaft is installed on the tensioning support in a lifting mode. And the mounting positions of the adjusting shaft mounted on the film feeding bracket and the first film guide roller are both higher than the tensioning shaft. By additionally arranging the adjusting shaft and the automatic tensioning mechanism, the tightness of the packaging film is adjusted, the automatic tensioning device is reasonable in structure and reliable in operation, and the packaging film can be effectively prevented from loosening in the operation process.

Description

Technical Field

[0001] The utility model relates to an automatic film-line tensioning device for a multi-channel packaging machine, which is suitable for product packaging and belongs to the technical field of packaging machinery. Background Art

[0002] Existing multi-channel packaging machine film path mechanism such as Figure 1 and Figure 2 As shown, it includes a film feeding bracket 1, a coding machine 2, a second film guide roller 3, a first film guide roller 4, a film drum rack 5, and a film changing device 6. The packaging film is conveyed to the correct direction by the first film guide roller 4 and the second film guide roller 3 through the film changing device 6 for packaging food products.

[0003] The existing multi-channel packaging machine film path mechanism is not equipped with a film pressing mechanism or the setting is not effective enough. After the packaging film passes through the film changing device, it is guided by multiple film guide rollers. Due to the long film traveling distance and many guiding times, the packaging film running speed may change when the film roll size changes during the film traveling process, and the packaging film may become loose, which not only affects the film traveling quality, but also causes problems such as unsightly packaging, equipment shutdown, and reduced production efficiency.

[0004] Due to the large variety of existing packaging materials, different materials and thicknesses, and different transmission requirements, it is necessary to transform the existing equipment to eliminate speed fluctuations and loose packaging film caused by changes in film roll size, so as to ensure the smooth operation of the product packaging production line. Summary of the Invention

[0005] The utility model aims to solve the problems existing in the prior art and provides an automatic film tensioning device for a multi-channel packaging machine.

[0006] The specific technical solutions of the utility model are as follows:

[0007] A multi-channel packaging machine film automatic tensioning device includes a film drum frame, a roller changing device, a film guide bracket and a first film guide roller. The film drum frame, the roller changing device and the first film guide roller are respectively installed on the film guide bracket, and the film drum is installed on the film drum frame.

[0008] The film feed bracket is also provided with an adjusting shaft and an automatic tensioning mechanism, which are arranged between the roller changing device and the first film guide roller. The automatic tensioning mechanism is arranged between the adjusting shaft and the first film guide roller. The automatic tensioning mechanism includes a tensioning bracket and a tensioning shaft. The tensioning shaft is liftably mounted on the tensioning bracket. The adjusting shaft and the first film guide roller installed on the film feed bracket are both installed at a higher position than the tensioning shaft.

[0009] The packaging film of the film drum passes through the roller changing device, the adjusting shaft, the tensioning shaft, and then passes through the first film guide roller and the subsequent film guide rollers to be fed to the packaging machine.

[0010] Furthermore, the tensioning bracket is provided with a chute, with both ends of the tensioning shaft respectively positioned within the chute. The tensioning shaft is capable of ascending and descending movement within the chute. The tensioning shaft, positioned within the chute, uses its own gravity to press against the packaging film. The tensioning shaft can be freely adjusted up and down within the chute, thereby achieving the requirement of automatically and in real time tensioning the packaging film according to the varying tightness of the film roll during operation.

[0011] Furthermore, the end of the tensioning shaft and the slideway of the tensioning bracket utilize an anti-drift mechanism. This anti-drift mechanism includes a notch structure with a larger center and smaller sides in the slideway, and a corresponding matching structure with a larger diameter in the center of the end of the tensioning shaft. This structure prevents the tensioning shaft from drifting or even losing its function as it rolls with the packaging film.

[0012] Furthermore, the highest point of the adjustment shaft installed on the film support and the highest point of the first film guide roller on the film support are at the same water level, and the packaging film passing between the adjustment shaft and the first film guide roller is in a horizontal state.

[0013] Furthermore, the adjusting shaft is provided with a translation mechanism for adjusting the distance between the adjusting shaft and the tensioning shaft.

[0014] Furthermore, the automatic tensioning mechanism is equipped with multiple sets of tensioning shafts, each set of tensioning shafts is provided with a counterweight. By replacing the tensioning shafts with different counterweights provided on the tensioning bracket, the different tensioning requirements of packaging films of different types and materials can be met.

[0015] Furthermore, it also includes a crossbeam, and the tensioning bracket of the automatic tensioning mechanism is installed on the film-feeding bracket through the crossbeam.

[0016] Furthermore, tensioning brackets and tensioning shafts are mounted on the crossbeam according to the number of multi-lane packaging machines. Adjacent tensioning shafts can share a tensioning bracket on one side, with slideways positioned on either side of the tensioning bracket. The highest point of the tensioning bracket should be above the horizontal plane through which the packaging film passes. The packaging film passing between the adjustment shaft and the film guide shaft is automatically tensioned by the tensioning shaft.

[0017] Furthermore, the cross beams are provided in multiple groups, and each group of cross beams is respectively installed with a tensioning bracket and a tensioning shaft, which are used for a multi-lane packaging machine to convey multiple packaging films or to achieve multi-stage tensioning.

[0018] Furthermore, the crossbeam is made of aluminum; the tensioning bracket is made of polyformaldehyde; and the tensioning shaft is made of stainless steel.

[0019] Compared with the prior art, the present invention has the following technical effects:

[0020] 1. The automatic film tensioning device for a multi-channel packaging machine in this application is ingeniously designed and easily adaptable to existing design improvements. By adding an adjustment shaft and an automatic tensioning mechanism to adjust the tightness of the packaging film, and by rationally arranging the adjustment shaft and the automatic tensioning mechanism, this device automatically adjusts the tightness of the film roll as it changes in size during operation, eliminating the problems of film sagging and unstable operation that can occur during conventional film feeding.

[0021] 2. The automatic tensioning mechanism has a reasonable structure. It can press the packaging film between the adjustment shaft and the film guide roller through the weight of the tensioning shaft itself, adjust the tension of the packaging film during movement, eliminate the loosening of the film cylinder during film feeding, and operate stably and reliably.

[0022] 3. This application is designed with an adjustment shaft, which adjusts the position between the adjustment shaft and the automatic tensioning shaft to adjust the tension of the film and ensure the smooth operation of the product packaging production line.

[0023] 4. This application features an automatic tensioning mechanism that uses the weight of the tensioning shaft to adjust tension, effectively changing the tightness of the packaging film during movement. By replacing the tensioning shaft with different counterweights, the tension requirements of packaging materials of varying materials and thicknesses can be adapted. This is suitable for retrofitting existing equipment with minimal investment, effectively improving overall performance and meeting the transport requirements of a wide range of packaging materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is one of the structural diagrams of the film path mechanism of the existing multi-channel packaging machine;

[0025] Figure 2 This is the second structural diagram of the film path mechanism of the existing multi-channel packaging machine;

[0026] Figure 3 This is one of the structural diagrams of the automatic film tensioning device of the multi-channel packaging machine of the present utility model;

[0027] Figure 4 This is the second structural diagram of the automatic film tensioning device of the multi-channel packaging machine of the present invention;

[0028] In the figure: 1-film feeding bracket; 2-coding machine; 3-second film guide roller; 4-first film guide roller; 5-film drum rack; 6-film changing device; 7-adjusting shaft; 8-crossbeam; 9-tensioning bracket; 10-tensioning shaft; 11-film drum. DETAILED DESCRIPTION Example 1:

[0029] like Figure 3 、 Figure 4As shown, the automatic film tensioning device of the multi-channel packaging machine of the present invention includes a film feeding bracket 1, a film drum rack 5, a roller changing device 6, a first film guide roller 4, a crossbeam 8, an adjusting shaft 7, a tensioning bracket 9 of the multi-channel film path arranged on the crossbeam, and a tensioning shaft 10 arranged between the tensioning brackets, and the film drum 11 is installed on the film drum rack 5.

[0030] The tensioning bracket 9 and the tensioning shaft 10 arranged on the crossbeam 8 have an adjusting shaft and an automatic tensioning mechanism. The adjusting shaft 7 and the automatic tensioning mechanism are arranged between the roller changing device 6 and the first film guide roller 4. The automatic tensioning mechanism is arranged between the adjusting shaft 7 and the first film guide roller 4. The automatic tensioning mechanism includes a tensioning bracket 9 and a tensioning shaft 10. The 4 tensioning shafts are installed on the tensioning bracket 9 in a liftable manner. The first film guide roller 4, the adjusting shaft 7 and the tensioning bracket 9 are installed on the film feeding bracket 1. The installation positions of the adjusting shaft 7 and the first film guide roller 4 are both higher than the tensioning shaft 10; the packaging film of the film cylinder 11 passes through the roller changing device 6, the adjusting shaft 7, the tensioning shaft 10 in turn, and then passes through the first film guide roller 4 and the subsequent film guide rollers to feed the film to the packaging machine.

[0031] The tensioning shaft 10 is installed between the tensioning brackets 9 and presses the packaging film, allowing it to move freely up and down between the tensioning brackets 9. The arrangement of the tensioning shaft 10 changes the tightness of the packaging film during its movement. As the packaging film passes between the adjustment shaft 7 and the first film guide roller 4, it remains relatively tensioned, thus ensuring smooth processing of subsequent processes.

[0032] This embodiment is improved by arranging a tensioning shaft 10 between the membrane support 1. The structure is relatively simple, stable and reliable. Compared with other tensioning methods, the tensioning shaft method is more economical and practical and does not require any driving device. Example 2:

[0033] This example further enhances the first embodiment by providing a chute on the tensioning bracket 9. The ends of a tensioning shaft 10 are positioned within the chute, allowing the shaft 10 to move up and down within the chute. The tensioning shaft 10, positioned within the chute, uses its own gravity to press the packaging film. The tensioning shaft of the first film guide roller 4 can be freely adjusted up and down within the chute, thereby achieving real-time automatic tensioning of the packaging film as the film roll changes in size during operation.

[0034] The automatic tensioning mechanism of this application is equipped with multiple sets of tensioning shafts, each with a counterweight. By replacing the tensioning shafts mounted on the tensioning bracket, the weight of the tensioning shafts can be varied to accommodate the varying tensioning requirements of packaging films of different types and materials. This allows for effective, real-time automatic tensioning of all types of packaging films.

[0035] The ends of the tensioning shaft 10 and the chute of the tensioning bracket 9 utilize an anti-drift mechanism. This anti-drift mechanism includes a notch structure with a larger center and smaller sides, and a corresponding matching structure with a larger diameter at the end of the tensioning shaft. This ensures that the tensioning shaft 10 maintains relative stability while pressing against the packaging film to achieve tension, and also allows for smoother rotation when driven by the packaging film. This structure prevents the tensioning shaft from shifting or even losing its function as it rolls with the packaging film. Example 3:

[0036] This embodiment further improves upon the first embodiment by providing a translation mechanism on the first film guide roller 4 for adjusting the spacing between the adjustment shaft 7 and the tensioning shaft 10 to adjust the tension of the packaging film. The translation mechanism can be implemented using a slide rail or an adjustable clip. Example 4:

[0037] This example further enhances the first embodiment by installing a crossbeam 8. The tensioning bracket 9 of the automatic tensioning mechanism is mounted on the film feed frame 1 via the crossbeam 8. The crossbeam 8 is positioned between the adjustment shaft 7 and the first film guide roller 4. The highest point of the tensioning shaft 10 is lower than both the adjustment shaft 7 and the first film guide roller 4. The highest points of the adjustment shaft 7 and the first film guide roller 4, mounted on the film feed frame, are at the same water level, ensuring that the packaging film passing between the adjustment shaft 7 and the first film guide roller 4 remains horizontal.

[0038] The automatic tensioning mechanism uses the weight of the tensioning shaft 10 itself to create different downward pressure effects on the different tightness of the packaging film at different times, so that the tensioning shaft 10 can be effectively adjusted in real time according to the different tightness of the current packaging film, thereby reducing the tediousness of manual adjustment and achieving a real-time self-gravity adjustment effect.

[0039] In this example, the crossbeam 8 is made of aluminum, the tensioning bracket 9 is made of polyoxymethylene, and the tensioning shaft 10 is made of stainless steel. Embodiment 5:

[0040] This example further enhances the design of Example 1. Tension brackets are installed on the crossbeam of the first film guide roller 4, corresponding to the number of multi-lane packaging machines. Tension shafts are interposed between the tension brackets. Adjacent tension shafts can share a single tension bracket, with chutes located on either side of the tension brackets. The highest point of the tension brackets should be above the horizontal plane through which the packaging film passes. The packaging film passing between the adjustment shaft and the film guide shaft is automatically tensioned by the tension shafts. Example 6:

[0041] This example further enhances the design of Example 1 by providing multiple sets of crossbeams, each with a tensioning bracket and tensioning shaft. For example, two sets of crossbeams and two sets of automatic tensioning devices can be used to disperse multiple strips of packaging film in a multi-lane packaging machine. Alternatively, through strategically positioned placement, two-stage tensioning can be achieved.

[0042] The working process of this utility model is as follows:

[0043] During operation, the packaging film passes through the die-changing device 6 and reaches a relatively horizontal position between the adjustment shaft 7 and the first film guide roller 4. There, it is pressed by the tensioning shaft 10 positioned between the adjustment shaft 7 and the first film guide roller 4. The tensioning shaft 10, through its own gravity, effectively adjusts the tension of the packaging film to the varying degrees of tension at different times. This multi-lane packaging machine's automatic film tensioning device can also adjust the number of tensioning shaft lanes according to actual production needs, achieving adjustable tensioning.

[0044] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by a person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the utility model.

Claims

1. An automatic film tensioning device for a multi-lane packaging machine, comprising a film drum rack, a roller changing device, a film feed support, and a first film guide roller, wherein the film drum rack, the roller changing device, and the first film guide roller are respectively mounted on the film feed support, and the film drum is mounted on the film drum rack, characterized in that: The film feed bracket is also provided with an adjusting shaft and an automatic tensioning mechanism, which are arranged between the roller changing device and the first film guide roller, and the automatic tensioning mechanism is arranged between the adjusting shaft and the first film guide roller. The automatic tensioning mechanism includes a tensioning bracket and a tensioning shaft, and the tensioning shaft is installed in a liftable manner on the tensioning bracket. The adjusting shaft and the first film guide roller installed on the film feed bracket are both installed at higher positions than the tensioning shaft; the packaging film of the film cylinder passes through the roller changing device, the adjusting shaft, the tensioning shaft, and then through the first film guide roller and subsequent film guide rollers to feed the film to the packaging machine.

2. The automatic film tensioning device for a multi-lane packaging machine according to claim 1, characterized in that: The tensioning bracket is provided with a slide groove, and both ends of the tensioning shaft are respectively arranged in the slide groove, and the tensioning shaft can move up and down in the slide groove.

3. The automatic film tensioning device for a multi-lane packaging machine according to claim 2, characterized in that: The end of the tensioning shaft and the slide groove of the tensioning bracket are matched with an anti-deviation structure; the anti-deviation structure includes a notch structure with a large middle and small sides of the slide groove, and a matching structure with a large middle diameter corresponding to the end of the tensioning shaft.

4. The automatic film tensioning device for a multi-lane packaging machine according to claim 3, characterized in that: The highest point of the adjusting shaft installed on the film support is at the same water level as the highest point of the first film guide roller on the film support, and the packaging film passing between the adjusting shaft and the first film guide roller is in a horizontal state.

5. The automatic film tensioning device for a multi-lane packaging machine according to claim 1, characterized in that: The adjusting shaft is provided with a translation mechanism for adjusting the distance between the adjusting shaft and the tensioning shaft.

6. The automatic film tensioning device for a multi-lane packaging machine according to claim 4, characterized in that: The automatic tensioning mechanism is equipped with multiple groups of tensioning shafts, and each group of tensioning shafts is provided with a counterweight.

7. The automatic film tensioning device for a multi-lane packaging machine according to claim 6, characterized in that: It also includes a crossbeam, and the tensioning bracket of the automatic tensioning mechanism is installed on the film-moving bracket through the crossbeam.

8. The automatic film tensioning device for a multi-lane packaging machine according to claim 7, characterized in that: The crossbeam is provided with tensioning brackets and tensioning shafts according to the number of multi-lane packaging machines.

9. The automatic film tensioning device for a multi-lane packaging machine according to claim 8, characterized in that: The cross beams are arranged in multiple groups, and each group of cross beams is respectively equipped with a tensioning bracket and a tensioning shaft, which are used for a multi-channel packaging machine to convey multiple packaging films or to achieve multi-stage tensioning.

10. The automatic film tensioning device for a multi-lane packaging machine according to claim 9, characterized in that: The crossbeam is made of aluminum; the tensioning bracket is made of polyformaldehyde; and the tensioning shaft is made of stainless steel.

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