Tensioning mechanism for preparing environment-friendly plastic bag

Abstract

The utility model belongs to the technical field of plastic bag preparation, and particularly relates to a tensioning mechanism for preparing an environment-friendly plastic bag, which comprises a base, a connecting rod is slidably connected in the base, a guide block is fixedly connected to the lower end of the connecting rod, a guide rod is fixedly connected in the base, and the outer side of the base is in contact with a turntable. Supporting frames are fixedly connected to the outer sides of the rotating discs, connecting shafts are fixedly connected to the interiors of the supporting frames, and tensioning rollers make contact with the sides, close to each other, of the supporting frames. According to the environment-friendly plastic bag winding device, the tensioning rollers are arranged, the tensioning effect can be achieved when an environment-friendly plastic bag is wound, the threaded rod is arranged, the distance between the two tensioning rollers can be adjusted, and therefore the environment-friendly plastic bag winding device is suitable for environment-friendly plastic bags of different specifications; the problems that when the environment-friendly plastic bags are wound, the plastic bags are prone to being stacked, and winding is inconvenient are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plastic bag preparation, specifically to a tensioning mechanism for the preparation of environment-friendly plastic bags. BACKGROUND

[0002] In the preparation process of environment-friendly plastic bags, the tensioning mechanism plays a key role in ensuring uniform film material delivery and stable processing. The mechanism mainly consists of tensioning rollers, elastic adjusting devices, guide assemblies, and support structures. Its core function is to prevent plastic film from wrinkling, breaking, or deviating during stretching, printing, and heat sealing processes through reasonable tension control, thereby improving product quality and production efficiency. According to the utility model disclosed in patent authorization announcement No. CN217780224U, a kind of environment-friendly plastic bag processing and winding device, including workbench, the workbench is equipped with rectangular groove, the rectangular groove is equipped with limit block, the rectangular groove is rotatably connected with threaded rod, the threaded rod is rotatably connected with limit block, the threaded rod both sides outer thread is set to opposite direction, and is connected with positioning plate through screw mechanism, the threaded rod one end is equipped with driving mechanism, two positioning plates opposite side walls are rotatably connected with driving shaft, two driving shafts are equipped with fixed disc, two positioning plates are connected with support ring through linkage mechanism, the support ring bottom end is equipped with buffer mechanism.

[0003] However, the stacking phenomenon of environment-friendly plastic bags during winding is a common problem, mainly due to the material properties of plastic bags and the design deficiencies of winding equipment. Since environment-friendly plastic bags generally use relatively soft materials and do not contain additives like traditional plastic bags, their surface friction is larger, leading to mutual adhesion during winding and thus causing stacking. This stacking phenomenon not only makes the winding process more difficult, but also easily causes bag waste and low packaging efficiency. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a tensioning mechanism for the preparation of environment-friendly plastic bags, solving the problem of stacking of plastic bags during winding and making winding more convenient.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of tensioning mechanism for environmental protection type plastic bag preparation, including base, the inside sliding connection of base is connected with connecting rod, the lower end of connecting rod is fixedly connected with guide block, the inside fixed connection of base is with guide rod, the outside contact of base is with carousel, the outside fixed connection of carousel is with support frame, the inside fixed connection of support frame is with connecting shaft, the side of support frame being close to each other all contact with tensioning roller, the side fixedly connected with shaft of tensioning roller being close to support frame, the shaft and support frame are connected by bearing, the inside of tensioning roller is provided with threaded rod, adjusting mechanism is provided on base.

[0006] Preferably, the guide block is slidably connected with the base, and the guide block is slidably connected with the guide rod.

[0007] Preferably, the connecting shaft is fixedly connected with the carousel, and the connecting shaft is connected with the base by a bearing.

[0008] Preferably, the outside of the threaded rod is provided with threads, and the threaded rod is connected with the tensioning roller by threads.

[0009] Preferably, the adjusting mechanism comprises a push block, a clamping block is fixedly connected to the side of the push block close to the support frame, a clamping groove is formed in the inside of the support frame, the clamping groove is slidably connected with the clamping block, a sliding block is fixedly connected to the lower end of the push block, the sliding block is slidably connected with the base, a slide rod is fixedly connected to the side of the sliding block away from the support frame, the slide rod is slidably connected with the base, a limiting ring is fixedly connected to the inside of the base, the limiting ring is slidably connected with the slide rod, and a spring is arranged in the inside of the base.

[0010] Preferably, one end of the spring is in contact with the slide rod, and the other end of the spring is in contact with the base.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1、The utility model discloses a tensioning roller, which can play a tensioning role when the environmental protection type plastic bag is rolled up, and a threaded rod is arranged to adjust the distance between the two tensioning rollers, so that the tensioning mechanism is suitable for different specifications of environmental protection type plastic bags, and the problem that the environmental protection type plastic bag is prone to stacking when rolled up is solved.

[0013] 2, the utility model discloses a turntable, connecting shaft and other components are set up, can adjust the angle of the tension roller, and through the design of push block, clamping block, spring and other components, the elastic force of spring can drive push block to move, make push block drive clamping block slide into the clamping groove on the turntable, can limit the effect of turntable, thereby make the tension roller keep stable after adjusting. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the overall structure perspective drawing of the utility model;

[0015] Figure 2 It is the overall structure perspective drawing of the utility model; Figure 1 It is the partial structure perspective drawing of the utility model;

[0016] Figure 3 It is the front view section view of the utility model of Figure 1 Enlarged drawing;

[0017] Figure 4 It is the A portion structure enlarged view in the utility model Figure 3

[0018] In the drawing: 1, base, 2, connecting rod, 21, guide block, 22, guide rod, 3, turntable, 31, support frame, 32, connecting shaft, 33, tension roller, 34, rotating shaft, 35, threaded rod, 4, adjusting mechanism, 41, push block, 42, clamping block, 43, clamping groove, 44, sliding block, 45, slide rod, 46, limit ring, 47, spring. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0020] Please refer to Figures 1-4 A tension mechanism for preparing environment-friendly plastic bags, including base 1, the inside sliding connection of base 1 has connecting rod 2, the lower end of connecting rod 2 is fixedly connected with guide block 21, the inside of base 1 is fixedly connected with guide rod 22, guide block 21 is slidably connected with base 1, guide block 21 is slidably connected with guide rod 22, through the design of guide block 21, can limit the effect of connecting rod 2, the outside of base 1 is contacted with turntable 3, the outside of turntable 3 is fixedly connected with support frame 31, the inside of support frame 31 is fixedly connected with connecting shaft 32.

[0021] Please refer to Figures 2-4 ​The connecting shaft 32 is fixedly connected to the turntable 3, and the connecting shaft 32 is connected to the base 1 through a bearing. The design of the connecting shaft 32 allows the support frame 31 to rotate. Tensioning rollers 33 are in contact with each other on the side of the support frame 31 that is close to each other. A rotating shaft 34 is fixedly connected to the side of the tensioning roller 33 that is close to the support frame 31. The rotating shaft 34 is connected to the support frame 31 through a bearing. A threaded rod 35 is provided inside the tensioning roller 33, and a thread is provided on the outside of the threaded rod 35. The threaded rod 35 is connected to the tensioning roller 33 through a thread. The design of the threaded rod 35 allows the distance between the two tensioning rollers 33 to be adjusted. An adjustment mechanism 4 is provided on the base 1.

[0022] Please see Figures 2-4 The adjusting mechanism 4 includes a push block 41, a locking block 42 fixedly connected to the side of the push block 41 near the support frame 31, a locking groove 43 opened inside the support frame 31, the locking groove 43 and the locking block 42 slidably connected, a slider 44 fixedly connected to the lower end of the push block 41, the slider 44 slidably connected to the base 1, a sliding rod 45 fixedly connected to the side of the slider 44 away from the support frame 31, the sliding rod 45 slidably connected to the base 1, a limiting ring 46 fixedly connected inside the base 1, the limiting ring 46 slidably connected to the sliding rod 45, a spring 47 set inside the base 1, one end of the spring 47 contacting the sliding rod 45, and the other end of the spring 47 contacting the base 1. Through the design of the spring 47, the locking block 42 can be driven to limit the turntable 3. Through the design of the adjusting mechanism 4, the angle of the tension roller 33 can be adjusted.

[0023] The specific implementation process of this utility model is as follows: By rotating the threaded rod 35, the threaded rod 35 and the tensioning roller 33 will undergo threaded movement, thereby moving the tensioning roller 33 on the threaded rod 35. The distance between the two tensioning rollers 33 can be adjusted, so that the tensioning roller 33 can be used for environmentally friendly plastic bags of different specifications.

[0024] By moving the push block 41 away from the turntable 3, the push block 41 drives the slider 44 to slide within the base 1, causing the slider 44 to drive the slide rod 45 to slide within the limiting ring 46. This causes the slide rod 45 to compress the spring 47, and the push block 41 to drive the locking block 42 to slide out of the slot 43 on the turntable 3. This releases the limitation on the turntable 3 and the limitation on the support frame 31, allowing the support frame 31 to drive the tension roller 33 to rotate, thus allowing the angle of the tension roller 33 to be adjusted.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tensioning mechanism for the production of environmentally friendly plastic bags, comprising a base (1), characterized in that: The inside of the base (1) is slidably connected with a connecting rod (2), the lower end of the connecting rod (2) is fixedly connected with a guide block (21), the inside of the base (1) is fixedly connected with a guide rod (22), the outside of the base (1) is contacted with a rotating disc (3), the outside of the rotating disc (3) is fixedly connected with a support frame (31), the inside of the support frame (31) is fixedly connected with a connecting shaft (32), the side of the support frame (31) close to each other is contacted with a tensioning roller (33), the side of the tensioning roller (33) close to the support frame (31) is fixedly connected with a rotating shaft (34), the rotating shaft (34) and the support frame (31) are connected through a bearing, the inside of the tensioning roller (33) is provided with a threaded rod (35), the base (1) is provided with an adjusting mechanism (4).

2. The tensioning mechanism for the environmentally friendly plastic bag production according to claim 1, characterized in that: The guide block (21) is slidably connected with the base (1), and the guide block (21) is slidably connected with the guide rod (22).

3. The tensioning mechanism for the environmentally friendly plastic bag production according to claim 1, characterized in that: The connecting shaft (32) is fixedly connected with the rotating disc (3), and the connecting shaft (32) is connected with the base (1) through a bearing.

4. The tensioning mechanism for the environmentally friendly plastic bag production according to claim 1, characterized in that: The outside of the threaded rod (35) is provided with a thread, and the threaded rod (35) is connected with the tensioning roller (33) through the thread.

5. The tensioning mechanism for the environmentally friendly plastic bag manufacturing according to claim 1, characterized in that: The adjusting mechanism (4) comprises a push block (41), the side of the push block (41) close to the support frame (31) is fixedly connected with a clamping block (42), the inside of the support frame (31) is provided with a clamping groove (43), the clamping groove (43) is slidably connected with the clamping block (42), the lower end of the push block (41) is fixedly connected with a sliding block (44), the sliding block (44) is slidably connected with the base (1), the side of the sliding block (44) away from the support frame (31) is fixedly connected with a sliding rod (45), the sliding rod (45) is slidably connected with the base (1), the inside of the base (1) is fixedly connected with a limiting ring (46), the limiting ring (46) is slidably connected with the sliding rod (45), and the inside of the base (1) is provided with a spring (47).

6. The tensioning mechanism for the environmentally friendly plastic bag production according to claim 5, characterized in that: One end of the spring (47) is in contact with the sliding rod (45), and the other end of the spring (47) is in contact with the base (1).

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