An automatic tension adjustment device for a bag making machine

Abstract

This utility model relates to the field of bag making machine technology and discloses an automatic tension adjustment device for a bag making machine, including a frame and a feeding roller. Each end of the feeding roller is rotatably connected to a bushing. The side wall of the frame is formed with a snap-fit ​​groove that mates with the bushing. The side wall of the frame is provided with a snap-fit ​​component and an adjustment mechanism. The adjustment mechanism includes a linkage component, a detection component, and an adjustment component. A plastic bag disc is inserted into the side wall of the feeding roller, and a pressing component is provided on the side wall of the feeding roller. By providing an adjustment mechanism, the tension of the plastic bag can be automatically adjusted, solving the problem that the tension adjustment effect of the prior art is easily affected, thus not affecting the processing quality of the plastic bag.

Description

Technical Field

[0001] This utility model relates to the field of bag making machine technology, specifically to an automatic tension adjustment device for a bag making machine. Background Technology

[0002] A bag-making machine is a machine that produces various plastic or other material packaging bags. Its processing range includes packaging bags of various sizes, thicknesses, and specifications made of plastic or other materials, with plastic packaging bags being the main product.

[0003] In the prior art, an automatic tension adjustment device for a plastic bag making machine includes a machine base and a primary tension adjustment mechanism mounted on the machine base. The primary tension adjustment mechanism includes a crossbeam mounted on the machine base, two sets of lifting components that slide through the crossbeam, and a primary tensioning component that is pushed and pulled up and down by the two sets of lifting components. The lifting components include a slide rod that slides through the crossbeam, an adjusting nut screwed onto the slide rod, and a spring sleeved on the slide rod and located between the lower surface of the adjusting nut and the top wall of the crossbeam. The lower end of the slide rod is connected to the primary tensioning component.

[0004] In the above scheme, when in use, the adjusting nut is turned to change the compression of the spring and adjust the lifting stroke of the slide rod. The elasticity of the spring pulls the slide rod up and down on the crossbeam to automatically adapt to and adjust the tension of the plastic film. However, after a long period of use, the spring will slowly oxidize in the air and may even be corroded, which will weaken the elasticity of the spring and affect the tension adjustment device's effect on the plastic film, thus affecting the processing quality of the plastic bag. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an automatic tension adjustment device for a bag making machine. By providing an adjustment mechanism, the tension of the plastic bag can be automatically adjusted, solving the problem that the tension adjustment effect of the prior art is easily affected, thus not affecting the processing quality of the plastic bag.

[0006] The solution of this utility model to the aforementioned technical problem is: An automatic tension adjustment device for a bag making machine includes a frame and a feeding roller. Each end of the feeding roller is rotatably connected to a bushing. The side wall of the frame is formed with a snap-fit ​​groove that mates with the bushing. The side wall of the frame is provided with a snap-fit ​​component and an adjustment mechanism. The adjustment mechanism includes a linkage component, a detection component, and an adjustment component. A plastic bag tray is inserted into the side wall of the feeding roller, and a pressing component is provided on the side wall of the feeding roller.

[0007] A plastic bag tray is inserted onto the feeding roller, and the inner wall of the tray is pressed by a pressing component to prevent it from rotating easily. This moves the feeding roller, causing the bushing to be placed in the snap-fit ​​groove. The snap-fit ​​component then secures the bushing, allowing the feeding roller to rotate. As the feeding roller releases the plastic bag, it simultaneously drives the linkage component to rotate. A detection component monitors the speed of the linkage component. If the speed is too high, an adjustment component is activated to apply resistance to the linkage component, requiring it to overcome resistance to rotate. This reduces the speed of the feeding roller, increasing the tension of the plastic bag and preventing it from loosening. Conversely, if the speed is too low, the adjustment component reduces the resistance applied to the linkage component, increasing the speed of the feeding roller and reducing the tension of the plastic bag, preventing it from becoming too tight. This automatic adjustment of the plastic bag's tension ensures optimal stability.

[0008] By incorporating an adjustment mechanism, the tension of the plastic bag can be automatically adjusted, solving the problem that the tension adjustment effect of existing technologies is easily affected, thus ensuring that the processing quality of the plastic bag is not compromised.

[0009] The utility model is further configured such that the snap-fit ​​assembly includes two snap-fit ​​blocks that are symmetrically rotatably connected to the side wall of the frame.

[0010] With the above technical solution, after the bushing insert is placed in the snap-fit ​​groove, the snap-fit ​​block is rotated so that one end of the snap-fit ​​block presses against the side wall of the bushing, thereby snapping and fixing the bushing.

[0011] The utility model is further configured such that: the linkage component includes a small gear rotatably connected to the side wall of the feeding roller, and a large gear meshing with the small gear is rotatably connected to the side wall of the frame.

[0012] With the above technical solution, the feeding roller drives the small gear to rotate during operation, and the rotation of the small gear drives the large gear to rotate. When it is necessary to adjust the tension of the plastic bag, a certain resistance is applied to the large gear through the adjustment component, so that the large gear needs to overcome the resistance to rotate. In this way, the rotation speed of the feeding roller can be controlled, thereby effectively adjusting the tension of the plastic bag.

[0013] The utility model is further configured such that: the detection component includes a proximity sensor fixed on the side wall of the frame, the proximity sensor is electrically connected to a controller, and the controller is electrically connected to the adjustment component.

[0014] The above technical solution can detect the rotational speed of the large gear. When the rotational speed of the large gear changes, the controller can control the adjustment component to apply different resistances to the large gear, thereby keeping the tension of the plastic bag constant.

[0015] The utility model is further configured such that: the adjustment component includes a brake plate fixed on the side wall of the large gear, a pneumatic brake is fixed on the side wall of the frame, the brake plate is sleeved inside the pneumatic brake, and the controller is electrically connected to the pneumatic brake.

[0016] The above technical solution allows for applying a certain resistance to the large gear by controlling the pneumatic brake to apply a certain resistance to the brake plate, thereby applying a certain resistance to the large gear.

[0017] The utility model is further configured such that: the pressing component includes multiple waist-shaped holes formed on the side wall of the feeding roller, the multiple waist-shaped holes are arranged symmetrically at the center, multiple compression springs are fixed at the bottom of the waist-shaped holes, a pressing block is inserted into the waist-shaped holes, and the upper end of the compression spring is fixed to the lower end of the pressing block.

[0018] With the above technical solution, when the plastic bag tray is inserted into the feeding roller, the pressing block is squeezed inward by the plastic bag tray and pressed against the inner wall of the plastic bag tray under the action of the compression spring, so that the plastic bag tray will not easily rotate.

[0019] The utility model is further configured such that there are two pneumatic brakes.

[0020] With the above technical solution, when one of the pneumatic brakes is damaged due to prolonged use, the other pneumatic brake can be activated, and the damaged pneumatic brake can be replaced at the same time, so as not to affect the use.

[0021] The utility model is further configured such that a guide roller is rotatably connected inside the frame.

[0022] The above technical solution can guide the released plastic bags.

[0023] The beneficial effects of this utility model are: Compared with existing technologies, this invention features an adjustment mechanism that automatically adjusts the tension of the plastic bag, solving the problem that the tension adjustment effect of existing technologies is easily affected, thus ensuring that the processing quality of the plastic bag is not compromised. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the disassembled feeding roller and connecting parts. Figure 3 for Figure 1 A magnified view of A.

[0025] Reference numerals: 1. Frame; 101. Snap-fit ​​groove; 2. Feed roller; 201. Waist-shaped hole; 3. Bushing; 4. Plastic bag tray; 5. Snap-fit ​​block; 6. Pinion; 7. Gear; 8. Proximity sensor; 9. Brake plate; 10. Pneumatic brake; 11. Compression spring; 12. Pressing block; 13. Guide roller. Detailed Implementation

[0026] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0027] The following is for reference Figures 1 to 3 This utility model will now be described.

[0028] An automatic tension adjustment device for a bag making machine includes a frame 1 and a feeding roller 2. Each end of the feeding roller 2 is rotatably connected to a bushing 3. The side wall of the frame 1 is formed with a snap-fit ​​groove 101 that mates with the bushing 3. The side wall of the frame 1 is provided with a snap-fit ​​component and an adjustment mechanism. The adjustment mechanism includes a linkage component, a detection component and an adjustment component. A plastic bag tray 4 is inserted into the side wall of the feeding roller 2. The side wall of the feeding roller 2 is provided with a pressing component.

[0029] The plastic bag tray 4 is inserted onto the feeding roller 2, and the inner wall of the plastic bag tray 4 is pressed by the pressing component to prevent the plastic bag tray 4 from rotating easily. This causes the feeding roller 2 to move, so that the bushing 3 is inserted into the snap-fit ​​groove 101. The snap-fit ​​component snaps and fixes the bushing 3, allowing the feeding roller 2 to rotate. When the feeding roller 2 rotates to release the plastic bag, it also drives the linkage component to rotate. The detection component detects the speed of the linkage component. When the speed is too fast, the adjustment component is activated to apply a certain resistance to the linkage component, so that the linkage component needs to overcome the resistance to rotate. This can reduce the speed of the feeding roller 2, thereby increasing the tension of the plastic bag and preventing the plastic bag from loosening. When the speed is low, the adjustment component is activated to reduce the resistance applied to the linkage component, thereby increasing the speed of the feeding roller 2, thereby reducing the tension of the plastic bag and preventing the plastic bag from being too tight. This can automatically adjust the tension of the plastic bag.

[0030] By incorporating an adjustment mechanism, the tension of the plastic bag can be automatically adjusted, solving the problem that the tension adjustment effect of existing technologies is easily affected, thus ensuring that the processing quality of the plastic bag is not compromised.

[0031] The snap-fit ​​assembly includes two snap-fit ​​blocks 5 that are symmetrically rotatably connected to the side wall of the frame 1.

[0032] After the bushing 3 is placed in the snap-fit ​​groove 101, the snap-fit ​​block 5 is rotated so that one end of the snap-fit ​​block 5 presses against the side wall of the bushing 3, thereby snapping and fixing the bushing 3.

[0033] The linkage assembly includes a small gear 6 rotatably connected to the side wall of the feeding roller 2, and a large gear 7 rotatably connected to the side wall of the frame 1, which meshes with the small gear 6.

[0034] When the feeding roller 2 is working, it drives the pinion 6 to rotate. The rotation of the pinion 6 drives the large gear 7 to rotate. When it is necessary to adjust the tension of the plastic bag, a certain resistance is applied to the large gear 7 through the adjustment component. The large gear 7 needs to overcome the resistance to rotate, thereby controlling the speed of the feeding roller 2 and effectively adjusting the tension of the plastic bag.

[0035] The detection assembly includes a proximity sensor 8 fixed to the side wall of the frame 1. The proximity sensor 8 is electrically connected to a controller, which is electrically connected to an adjustment assembly.

[0036] The rotational speed of the large gear 7 can be detected. When the rotational speed of the large gear 7 changes, the controller can control the adjusting component to apply different resistances to the large gear 7, thereby keeping the tension of the plastic bag constant.

[0037] The adjustment assembly includes a brake plate 9 fixed on the side wall of the large gear 7, a pneumatic brake 10 fixed on the side wall of the frame 1, the brake plate 9 being fitted inside the pneumatic brake 10, and the controller being electrically connected to the pneumatic brake 10.

[0038] When it is necessary to apply a certain resistance to the large gear 7, the pneumatic brake 10 is controlled by the controller to apply a certain resistance to the brake plate 9, thereby applying a certain resistance to the large gear 7.

[0039] The pressing component includes multiple waist-shaped holes 201 formed on the side wall of the feeding roller 2. The multiple waist-shaped holes 201 are arranged symmetrically at the center. Multiple compression springs 11 are fixed at the bottom of the waist-shaped holes 201. Pressing blocks 12 are inserted into the waist-shaped holes 201. The upper end of the compression spring 11 is fixed to the lower end of the pressing block 12.

[0040] When the plastic bag tray 4 is inserted into the feeding roller 2, the pressing block 12 is squeezed inward by the plastic bag tray 4 and pressed against the inner wall of the plastic bag tray 4 under the action of the compression spring 11, so that the plastic bag tray 4 will not rotate easily.

[0041] There are two pneumatic brakes 10.

[0042] When one of the pneumatic brakes 10 is damaged due to prolonged use, the other pneumatic brake 10 can be activated, and the damaged pneumatic brake 10 can be replaced, thus not affecting its use.

[0043] Guide rollers 13 are rotatably connected inside the frame 1.

[0044] It can guide the released plastic bags.

[0045] Working principle: The plastic bag tray 4 is inserted onto the feeding roller 2, causing the pressing block 12 to contract inward under the pressure of the plastic bag tray 4 and press against the inner wall of the plastic bag tray 4 under the action of the compression spring 11. This prevents the plastic bag tray 4 from rotating easily, causing the feeding roller 2 to move. The bushing 3 is then inserted into the locking groove 101. The locking block 5 is rotated, causing one end of the locking block 5 to press against the side wall of the bushing 3, thus locking and fixing the bushing 3. This allows the feeding roller 2 to rotate only. When the feeding roller 2 rotates to release the plastic bag, it simultaneously drives the small gear 6 to rotate. The rotation of the small gear 6 drives the large gear 7 to rotate, thus... The proximity sensor 8 detects the rotational speed of the large gear 7. When the speed is too high, the controller controls the pneumatic brake 10 to apply a certain resistance to the brake plate 9, thereby applying a certain resistance to the large gear 7. The large gear 7 needs to overcome the resistance to rotate, thus reducing the rotational speed of the feeding roller 2. This can increase the tension of the plastic bag and prevent the plastic bag from becoming loose. When the speed is low, the controller controls the pneumatic brake 10 to reduce the resistance applied to the large gear 7, which can increase the rotational speed of the feeding roller 2. This can reduce the tension of the plastic bag and prevent the plastic bag from becoming too tight. This can automatically adjust the tension of the plastic bag.

[0046] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. A kind of automatic tension adjusting device of bag making machine, including rack (1) and feed roller (2), it is characterized by: Each end of the feeding roller (2) is rotatably connected to a bushing (3). The side wall of the frame (1) is formed with a snap-fit ​​groove (101) that mates with the bushing (3). The side wall of the frame (1) is provided with a snap-fit ​​assembly and an adjustment mechanism. The adjustment mechanism includes a linkage assembly, a detection assembly and an adjustment assembly. A plastic bag tray (4) is inserted into the side wall of the feeding roller (2). The side wall of the feeding roller (2) is provided with a pressing assembly.

2. The automatic tension adjusting device of a bag making machine according to claim 1, characterized in that: The snap-fit ​​assembly includes two snap-fit ​​blocks (5) that are symmetrically rotatably connected to the side wall of the frame (1).

3. The automatic tension adjusting device of a bag making machine according to claim 1, characterized in that: The linkage assembly includes a small gear (6) rotatably connected to the side wall of the feeding roller (2), and a large gear (7) rotatably connected to the side wall of the frame (1) and meshing with the small gear (6).

4. The automatic tension adjustment device for a bag-making machine according to claim 3, characterized in that: The detection assembly includes a proximity sensor (8) fixed to the side wall of the frame (1).

5. A device for automatic tension adjustment of a bag making machine according to claim 4, characterized in that: The adjustment assembly includes a brake plate (9) fixed on the side wall of the large gear (7), and a pneumatic brake (10) fixed on the side wall of the frame (1). The brake plate (9) is fitted inside the pneumatic brake (10).

6. The automatic tension adjusting device of a bag making machine according to claim 1, characterized in that: The pressing component includes multiple waist-shaped holes (201) formed on the side wall of the feeding roller (2). The multiple waist-shaped holes (201) are arranged symmetrically at the center. Multiple compression springs (11) are fixed at the bottom of the waist-shaped holes (201). Pressing blocks (12) are inserted into the waist-shaped holes (201). The upper end of the compression springs (11) is fixed at the lower end of the pressing blocks (12).

7. The automatic tension adjusting device of a bag making machine according to claim 5, characterized in that: There are two pneumatic brakes (10).

8. The automatic tension adjusting device of a bag making machine according to claim 1, characterized in that: The frame (1) is rotatably connected to a guide roller (13).

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