Tensioning device for packaging bag conveying

Abstract

The utility model relates to a packing bag conveying tensioning device which comprises a swing frame, a power piece and a tensioning frame, the tensioning frame is arranged on the swing frame, a rotating shaft is arranged on the swing frame and located between the power piece and the tensioning frame, the power piece loosens the swing frame, and the tensioning frame is arranged on the power piece. The tensioning frame drives the swing frame to rotate around the rotating shaft so that the tensioning frame can tension the packaging bag. The packaging bag conveying device has the advantages that when conveying of packaging bags is stopped, the unwinding roller continues to unwind due to inertia, the packaging bags are loosened and fall below the tensioning frame, at the moment, the swing frame is loosened through the power piece, the tensioning frame drives the swing frame to fall around the rotating shaft due to the dead weight, the tensioning frame rotates along with the swing frame, the packaging bags can be tensioned through the tensioning frame, and the packaging bags can be conveyed conveniently. Therefore, the packaging bag can be continuously processed conveniently, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of packaging bag processing, and in particular relates to a tensioning device for packaging bag conveyance. Background Art

[0002] At present, the manufacturing process of packaging bags is usually to first put a roll of film for making packaging bags into the unwinding roller, and the film passes through the guide device and enters the heat sealing and cutting area for processing and forming. Because heat sealing and cutting require a certain amount of time, the film is intermittently advanced during operation. During heat sealing and cutting, the film stops conveying, but the unwinding roller will continue to rotate for a while due to inertia, causing the film to become loose. Once loose, workers or machines need to readjust and reposition the film to ensure that it is in the correct position for continued processing. This process takes extra time, thereby reducing overall production efficiency. Utility Model Content

[0003] In order to improve the problem that the film becomes loose and reduces the working efficiency when the film is conveyed temporarily, the utility model provides a tensioning device for conveying packaging bags, and the specific technical scheme is as follows:

[0004] A tensioning device for conveying packaging bags comprises a swing frame, a power piece and a tensioning frame, wherein the tensioning frame is arranged on the swing frame, and a rotating shaft is arranged on the swing frame, and the rotating shaft is located between the power piece and the tensioning frame. When the power piece loosens the swing frame, the tensioning frame drives the swing frame to rotate around the rotating shaft so that the tensioning frame tensions the packaging bag.

[0005] When the packaging bag stops being transported, the unwinding roller will continue to unwind due to inertia, causing the packaging bag to loosen and fall under the tensioning frame. At this time, the power part is used to loosen the swing frame. Due to its own weight, the tensioning frame drives the swing frame to fall around the rotating shaft, and the tensioning frame rotates accordingly, so that the tensioning frame can tension the packaging bag, which makes it easier to continue processing the packaging bag and improves production efficiency.

[0006] Furthermore, the tensioning frame includes at least one plate group, the plate group includes two arc-shaped plates, and the tensioning roller is arranged between the two arc-shaped plates. The arc-shaped plates are arranged along the circumference of the rotating shaft, and the arc-shaped plates are arranged on the side away from the power member. Since the straight rod swings and tensions, a larger swing amplitude space is required, so the arc-shaped plates are arranged to facilitate space avoidance.

[0007] Specifically, there are two sets of plate groups, and both of the two sets of plate groups are located on the side of the rotating shaft away from the power member. Through the two sets of plate groups, on the one hand, the deadweight of the tensioning frame can be increased, and the falling speed of the swing frame driven by the tensioning frame can be increased, and the two tensioning rollers can better tension the packaging bag, which can improve the effect of tensioning the packaging bag.

[0008] In a specific implementation scheme, the power part includes at least one power electric cylinder, a push block is provided on the end face of the power electric cylinder lifting and retracting rod, a swing frame is provided with a swing rod for the push block to push, and the push block is provided with a movable groove for the swing rod to slide.

[0009] The lifting and retracting rod of the power electric cylinder is reset, and the swing rod loses its thrust, so that the swing rod can move up along the moving groove, making it easier for the tensioning frame to drive the swing frame to fall, thereby tensioning the packaging bag.

[0010] In a specific possible implementation method, the swing frame includes two swing plates, and a support rod is arranged between the two swing plates. The two swing plates are supported by the support rod, so that the swing frame is more stable during the rotation process, and the reliability of the device is improved.

[0011] In a specific possible implementation manner, the rotating shaft includes a bearing arranged on a swing frame and a shaft core arranged inside the bearing.

[0012] The utility model has the following beneficial technical effects: the swing rod is loosened by the power electric cylinder, and the arc plate and the tensioning roller can drive the swing plate to fall around the rotating shaft due to their own weight, and the tensioning roller will fall accordingly, so that the tensioning roller can tension the packaging bag, thereby facilitating the continued processing of the packaging bag and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a tensioning device for conveying packaging bags according to an embodiment of the utility model.

[0014] Explanation of the accompanying drawings: 1. Swing frame; 2. Power part; 3. Rotating shaft; 4. Tensioning frame; 5. Tensioning roller; 6. Arc plate; 7. Power cylinder; 8. Push block; 9. Swing rod; 10. Moving groove; 11. Swing plate; 12. Support rod; 13. Bearing; 14. Shaft core; 15. Frame. DETAILED DESCRIPTION

[0015] The following is combined with Figure 1 The utility model is described in further detail.

[0016] Reference Figure 1 A tensioning device for conveying packaging bags comprises a swing frame 1 and a power member 2. A rotating shaft 3 is provided on the swing frame 1. A tensioning frame 4 is provided on the side of the swing frame 1 away from the power member 2. When the power member 2 releases the swing frame 1, the tensioning frame 4 drives the swing frame 1 to rotate around the rotating shaft 3 so that the tensioning frame 4 tensions the packaging bag.

[0017] The swing frame 1 includes two swing plates 11, between which a support rod 12 and a swing rod 9 are respectively provided, the axes of the support rod 12 and the swing rod 9 are parallel to the axis of the rotating shaft 3, and the rotating shaft 3 is located between the support rod 12 and the swing rod 9, and the rotating shaft 3 is arranged close to one side of the swing rod 9, and the rotating shaft 3 includes a bearing 13 arranged on the swing plate 11 and a shaft core 14 arranged on the inner side of the bearing 13.

[0018] The tensioning frame 4 includes at least one plate group. In this embodiment, there are two plate groups, two tensioning rollers 5, and the tensioning rollers 5 correspond to the plate groups one by one. The axis of the tensioning roller 5 is parallel to the axis of the rotating shaft 3. The support rod 12 is located between the two plate groups. Each plate group includes two arc plates 6. The two arc plates 6 are arranged between the two swing plates 11, and the arc plates 6 correspond to the swing plates 11 one by one. The arc plates 6 are arranged to the side away from the swing plate 11, and the arc plates 6 are arranged along the circumference of the rotating shaft 3. The tensioning roller 5 is arranged between the two arc plates 6, and the tensioning roller 5 is located below the swing plate 11.

[0019] The power member 2 includes at least one power electric cylinder 7. In the present embodiment, there are two power electric cylinders 7, both of which are arranged on the frame. A push block 8 is arranged on the end surface of the lifting and retracting rod of the power electric cylinder 7. A swing rod 9 for the pushing block 8 to push is arranged on the swing frame 1. A moving groove 10 for the swing rod 9 to slide is arranged on the push block 8. The moving groove 10 runs through the end of the push block 8, so that the swing rod 9 is easily inserted into the moving groove 10. In other embodiments, the power electric cylinder 7 may also be a pneumatic cylinder, and the lifting and retracting rod of the power electric cylinder 7 and the swing rod 9 may also be connected by a ball joint.

[0020] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A tensioning device for conveying packaging bags, characterized in that: The invention comprises a power piece (2), a swing frame (1) and a tensioning frame (4) arranged on the swing frame (1); the swing frame (1) is provided with a rotating shaft (3); the rotating shaft (3) is located between the power piece (2) and the tensioning frame (4); when the power piece (2) releases the swing frame (1), the tensioning frame (4) drives the swing frame (1) to rotate around the rotating shaft (3), so that the tensioning frame (4) tensions the packaging bag.

2. A tensioning device for packaging bag conveying according to claim 1, characterized in that: The tensioning frame (4) comprises at least one plate group, the plate group comprises two arc-shaped plates (6), and a tensioning roller (5) is arranged between the two arc-shaped plates (6).

3. A tensioning device for packaging bag conveying according to claim 2, characterized in that: There are two groups of plate sets, and both of the two groups of plate sets are located on the side of the rotating shaft (3) away from the power member (2).

4. A tensioning device for packaging bag conveying according to claim 2, characterized in that: The arc-shaped plate (6) is arranged along the circumference of the rotating shaft (3), and the arc-shaped plate (6) is arranged on a side away from the power component (2).

5. A tensioning device for packaging bag conveying according to claim 1, characterized in that: The power member (2) comprises at least one power electric cylinder (7), a push block (8) is provided on the end surface of the lifting and retracting rod of the power electric cylinder (7), and a swing rod (9) for being pushed by the push block (8) is provided on the swing frame (1).

6. A tensioning device for conveying packaging bags according to claim 5, characterized in that: The push block (8) is provided with a moving groove (10) for the swing rod (9) to slide.

7. A tensioning device for packaging bag conveyance according to claim 1, characterized in that: The swing frame (1) comprises two swing plates (11), and a support rod (12) is provided between the two swing plates (11).

8. A tensioning device for packaging bag conveyance according to claim 1, characterized in that: The rotating shaft (3) comprises a bearing (13) arranged on the swing frame (1) and a shaft core (14) arranged inside the bearing (13).

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