A vertical packaging machine synchronous belt vacuum film drawing assembly limiting mechanism

Abstract

This invention relates to the field of position adjustment technology for synchronous belt vacuum film-pulling components in packaging machines, specifically a limiting mechanism for synchronous belt vacuum film-pulling components in a vertical packaging machine. The mechanism includes a packaging machine body with two film-pulling components symmetrically installed on its inner side. A limiting mechanism is installed on the top of each film-pulling component, comprising multiple limiting screws of varying lengths used to change the distance between the two film-pulling components. An mounting plate is fixedly installed on the inner side of the packaging machine body. This invention uses multiple limiting screws of varying lengths. During adjustment, rotation causes the desired limiting screw to point towards a limiting block. Under the elastic force of a telescopic spring rod, the film-pulling component and the limiting screw approach the limiting block, and the limiting screw presses against the limiting block. The distance between the film-pulling components is then adjusted. This method is convenient, quick, simple to operate, and provides accurate distance adjustment. It requires minimal operating experience and is suitable for a wider range of workers.

Description

Technical Field

[0001] This invention relates to the field of position adjustment technology for synchronous belt vacuum film stretching components of packaging machines, specifically a limiting mechanism for synchronous belt vacuum film stretching components of vertical packaging machines. Background Technology

[0002] Vertical packaging machines are highly efficient and automated packaging equipment that use a vertical bag-making method to complete the metering, filling, sealing, and cutting processes. They are suitable for packaging various materials such as granules, powders, and liquids, and are widely used in the food, pharmaceutical, and chemical industries. The workflow involves forming a vertical cylindrical bag from roll film material using a forming device, then quantitatively filling the bag using a screw metering system or electronic scale, followed by sealing the bag with longitudinal and transverse sealing devices, and finally cutting and outputting the finished product. They feature high packaging speed, accurate metering, and strong adaptability, and can quickly adjust packaging styles by changing molds. Common models include standard vertical, liquid vertical, vacuum vertical, and multi-row vertical packaging machines, which can meet the packaging needs of different products such as snacks, condiments, tablets, and cosmetics. They are key equipment for modern production lines to improve packaging efficiency and quality.

[0003] Synchronous belt vacuum film stretching assembly is an important component of vertical packaging machines. Currently, some existing synchronous belt vacuum film stretching assemblies on the market use screw adjustment and pressure reducing valve to control the film stretching pressure. The limit and adjustment of this type of synchronous belt vacuum film stretching assembly rely on experience values. In addition, after changing the forming unit, the film stretching working position of the synchronous belt vacuum film stretching assembly needs to be readjusted. Different operators adjust the position differently, and the corresponding film stretching pressure will also be different, causing unstable film stretching, film deviation, and thus affecting the sealing effect of bag longitudinal sealing, wrinkling of the seal, and poor sealing. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a limiting mechanism for a synchronous belt vacuum film stretching assembly in a vertical packaging machine, thereby resolving the problem of the difficulty in adjusting the synchronous belt vacuum film stretching assembly.

[0005] A limiting mechanism for a synchronous belt vacuum film stretching assembly of a vertical packaging machine includes a packaging machine body. Two film stretching assemblies are symmetrically installed on the inner side of the packaging machine body. A limiting mechanism is installed on the top of each film stretching assembly. The limiting mechanism includes multiple limiting screws of different lengths for changing the distance between the two film stretching assemblies.

[0006] An installation plate is fixedly installed inside the packaging machine body, and a telescopic spring rod for pressing against the film stretching assembly is fixedly installed between the installation plate and the film stretching assembly.

[0007] Furthermore, a fixing seat is fixedly installed on the top of the membrane assembly, a fixing block is fixedly installed on the top of the fixing seat, and a rotating block is rotatably installed on the top of the fixing block, with a limit screw threadedly connected to the outside of the rotating block.

[0008] Furthermore, a locking nut is threaded onto the outer side of the limiting screw.

[0009] Furthermore, the rotating block has multiple limiting holes on its outer side, each corresponding to a limiting screw. An indexing pin is slidably inserted into the outer side of the fixed block, and the indexing pin engages with the limiting holes.

[0010] Furthermore, two limiting blocks are symmetrically fixedly installed on the top of the mounting plate, and the limiting blocks are in contact with the limiting screws.

[0011] Furthermore, a limiting rod is fixedly installed on the outer side of the mounting plate, and the limiting rod is slidably connected to the membrane assembly.

[0012] Furthermore, a spring is installed on the inner side of the telescopic spring rod, and the outer side of the telescopic spring rod is fixedly installed on the outer side of the mounting plate.

[0013] The beneficial effects of this invention are as follows:

[0014] The present invention discloses a limiting mechanism for a synchronous belt vacuum film stretching assembly of a vertical packaging machine. This mechanism employs multiple limiting screws of varying lengths. During adjustment, rotation causes the desired limiting screw to point towards the limiting block. Under the elastic force of the telescopic spring rod, the film stretching assembly and the limiting screw approach the limiting block, and the limiting screw presses against the limiting block. The spacing of the film stretching assembly is then adjusted. This method is convenient, quick, simple to operate, and allows for accurate distance adjustment. It requires minimal operational experience and is suitable for a wider range of workers. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This invention provides an overall structural schematic diagram of a limiting mechanism for a synchronous belt vacuum film stretching assembly in a vertical packaging machine.

[0017] Figure 2 A schematic diagram of the film-pulling assembly connection of a synchronous belt vacuum film-pulling assembly limiting mechanism for a vertical packaging machine provided by the present invention;

[0018] Figure 3 This invention provides a schematic diagram of the limiting mechanism structure of a synchronous belt vacuum film stretching assembly limiting mechanism for a vertical packaging machine.

[0019] In the picture:

[0020] 1. Limiting mechanism; 1.1. Fixed base; 1.2. Fixed block; 1.3. Rotating block; 1.4. Indexing pin; 1.5. Limiting screw; 1.6. Locking nut; 1.7. Limiting hole;

[0021] 2. Limiting block; 3. Film stretching assembly; 4. Mounting plate; 5. Telescopic spring rod; 6. Limiting rod; 7. Packaging machine body. Detailed Implementation

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0023] like Figures 1-3 As shown, this embodiment of the invention provides a limiting mechanism for a vertical packaging machine with a synchronous belt vacuum film stretching assembly, including a packaging machine body 7. Two film stretching assemblies 3 are symmetrically installed on the inner side of the packaging machine body 7. A limiting mechanism 1 is installed on the top of the film stretching assembly 3 to limit the working distance between the two film stretching assemblies 3, thereby adapting to different size processing requirements. The limiting mechanism 1 includes multiple limiting screws 1.5 of different lengths for changing the distance between the two film stretching assemblies 3.

[0024] An installation plate 4 is fixedly installed inside the packaging machine body 7. A telescopic spring rod 5 for pressing against the film stretching assembly 3 is fixedly installed between the installation plate 4 and the film stretching assembly 3. A spring is installed inside the telescopic spring rod 5 and is in a compressed state. The telescopic spring rod 5 is fixedly installed on the outside of the installation plate 4. Two limit blocks 2 are symmetrically fixedly installed on the top of the installation plate 4 to limit the position of the film stretching assembly 3. The limit blocks 2 are in contact with the limit screws 1.5.

[0025] In this embodiment, rotation causes the required limiting screw 1.5 to point towards the limiting block 2. Under the elastic force of the telescopic spring rod 5, the film stretching assembly 3 and the limiting screw 1.5 approach the limiting block 2. The limiting screw 1.5 presses against the limiting block 2, and the spacing of the film stretching assembly 3 is adjusted. This is convenient, quick, simple to operate, and the distance adjustment is accurate. It does not require much operating experience and is suitable for more workers.

[0026] Specifically, a fixing seat 1.1 is fixedly installed on the top of the membrane assembly 3, a fixing block 1.2 is fixedly installed on the top of the fixing seat 1.1, a rotating block 1.3 is rotatably installed on the top of the fixing block 1.2, and a limit screw 1.5 is threadedly connected to the outside of the rotating block 1.3.

[0027] Specifically, the outer thread of the limiting screw 1.5 is connected to a locking nut 1.6, which can effectively prevent the limiting screw 1.5 from loosening, so that the exposed length of the limiting screw 1.5 remains basically unchanged, thus meeting the design requirements.

[0028] In this embodiment, four limiting screws 1.5 of different lengths are first screwed into the rotating block 1.3 to ensure that the length of the four screws extending out is the theoretically calculated limiting position. Then, the locking nut 1.6 is rotated so that the locking nut 1.6 and the rotating block 1.3 are pressed together.

[0029] Specifically, the rotating block 1.3 has multiple limiting holes 1.7 on its outer side, and the limiting holes 1.7 correspond one-to-one with the limiting screws 1.5. The fixing block 1.2 has a sliding indexing pin 1.4 on its outer side, which is a spring indexing pin, and the indexing pin 1.4 is inserted into the limiting hole 1.7.

[0030] In this embodiment, when adjusting the spacing of the film-pulling assembly 3, first pull the film-pulling assembly 3 away from the limiting block 2, then pull out the movable end of the indexing pin 1.4 and disengage it from the limiting hole 1.7, rotate the rotating block 1.3 so that the required limiting screw 1.5 points to the limiting block 2, loosen the indexing pin 1.4, insert the end of the indexing pin 1.4 into the limiting hole 1.7 to limit the bottom of the rotating block 1.3, then loosen the film-pulling assembly 3, and the film-pulling assembly 3 and the limiting screw 1.5 approach the limiting block 2 under the elastic force of the telescopic spring rod 5, and the limiting screw 1.5 presses against the limiting block 2, thus completing the spacing adjustment of the film-pulling assembly 3.

[0031] Specifically, a limiting rod 6 is fixedly installed on the outer side of the mounting plate 4 to limit the movement trajectory of the membrane stretching assembly 3. The limiting rod 6 is slidably connected to the membrane stretching assembly 3.

[0032] Specific working methods:

[0033] First, screw four limiting screws 1.5 of different lengths into the rotating block 1.3, ensuring that the lengths of the four screws extending are at the theoretically calculated limiting positions. Then, rotate the locking nut 1.6 to make the locking nut 1.6 abut against the rotating block 1.3. Next, screw the indexing pin 1.4 into the fixing block 1.2, with the end of the indexing pin 1.4 inserted into the limiting hole 1.7 to limit the bottom of the rotating block 1.3. Then, the limiting mechanism 1 is installed on the film stretching assembly 3, and the limiting block 2 is installed on the mounting plate 4.

[0034] When adjusting the spacing of the film stretching assembly 3, first pull the film stretching assembly 3 away from the limiting block 2, then pull out the movable end of the indexing pin 1.4 and disengage it from the limiting hole 1.7, rotate the rotating block 1.3 so that the required limiting screw 1.5 points to the limiting block 2, loosen the indexing pin 1.4, insert the end of the indexing pin 1.4 into the limiting hole 1.7 to limit the bottom of the rotating block 1.3, then loosen the film stretching assembly 3, and the film stretching assembly 3 and the limiting screw 1.5 approach the limiting block 2 under the elastic force of the telescopic spring rod 5, and the limiting screw 1.5 presses against the limiting block 2. The spacing of the film stretching assembly 3 is now adjusted.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A limiting mechanism for a synchronous belt vacuum film stretching assembly of a vertical packaging machine, comprising a packaging machine body (7), wherein two film stretching assemblies (3) are symmetrically installed on the inner side of the packaging machine body (7), characterized in that: The top of the membrane assembly (3) is equipped with a limiting mechanism (1), which includes multiple limiting screws (1.5) of different lengths used to change the distance between the two membrane assemblies (3). An installation plate (4) is fixedly installed on the inner side of the packaging machine body (7), and a telescopic spring rod (5) for pressing against the film pulling assembly (3) is fixedly installed between the installation plate (4) and the film pulling assembly (3).

2. The limiting mechanism for a synchronous belt vacuum film stretching assembly of a vertical packaging machine as described in claim 1, characterized in that: The membrane assembly (3) is fixedly mounted with a fixed seat (1.1) on top, a fixed block (1.2) is fixedly mounted on top of the fixed seat (1.1), a rotating block (1.3) is rotatably mounted on top of the fixed block (1.2), and a limit screw (1.5) is threadedly connected to the outside of the rotating block (1.3).

3. The limiting mechanism for a synchronous belt vacuum film stretching assembly of a vertical packaging machine as described in claim 1, characterized in that: The limiting screw (1.5) is threaded with a locking nut (1.6) on its outer side.

4. The limiting mechanism for a synchronous belt vacuum film stretching assembly of a vertical packaging machine as described in claim 2, characterized in that: The rotating block (1.3) has multiple limiting holes (1.7) on its outer side, and the limiting holes (1.7) correspond one-to-one with the limiting screws (1.5). The fixing block (1.2) has a sliding indexing pin (1.4) on its outer side, and the indexing pin (1.4) is engaged with the limiting holes (1.7).

5. The limiting mechanism for a synchronous belt vacuum film stretching assembly of a vertical packaging machine as described in claim 1, characterized in that: The mounting plate (4) has two symmetrically fixed limit blocks (2) on its top, and the limit blocks (2) are in contact with the limit screws (1.5).

6. The limiting mechanism for a synchronous belt vacuum film stretching assembly of a vertical packaging machine as described in claim 1, characterized in that: A limiting rod (6) is fixedly installed on the outside of the mounting plate (4), and the limiting rod (6) is slidably connected to the membrane assembly (3).

7. The limiting mechanism for a synchronous belt vacuum film stretching assembly of a vertical packaging machine as described in claim 1, characterized in that: A spring is installed on the inner side of the telescopic spring rod (5), and the outer side of the telescopic spring rod (5) is fixedly installed on the outer side of the mounting plate (4).

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