Bag making machine unreeling device facilitating reel replacement

Abstract

The utility model discloses a bag making machine unreeling device convenient for reel replacement, which is characterized by comprising a rotating frame, the rotating frame is connected with a rotation driving component, a first swing seat and a second swing seat are hinged on the rotating frame, locking components are arranged corresponding to the first swing seat and the second swing seat, a first inflatable shaft is arranged on the first swing seat, and a second inflatable shaft is arranged on the second swing seat. A second air expansion shaft is arranged on the second swing seat, a positioning seat is arranged on one side of the air expansion shaft corresponding to the lower position, a clamping assembly capable of clamping a prepared base material is arranged on the positioning seat, and a lifting seat is arranged above the positioning seat. The lifting seat is provided with a pressing and cutting assembly capable of pressing down and cutting off the base material unwound on the air expansion shaft close to the upper position. According to the utility model, only the air expansion shaft at the upper position can unwind, and the air expansion shaft at the lower position can swing to the outer side of the equipment, so that the reel replacement operation is convenient.

Description

Technical Field

[0001] The utility model relates to bag making equipment, in particular to a roll unwinding device of a bag making machine which is convenient for roll changing. Background Art

[0002] A bag-making machine is a specialized piece of equipment that enables automated production of packaging bags. The unwinding device is a crucial component of the bag-making machine, primarily used to unwind the packaging bag substrate. Traditional unwinding devices typically utilize two upper and lower pneumatic shafts to achieve alternating unwinding, enabling continuous unwinding of the substrate. The pneumatic shafts in these unwinding devices are typically mounted on a rotating frame and can only rotate on their own. The drawbacks of these unwinding devices are as follows: 1. To ensure the substrate is positioned and unwound, the pneumatic shafts are mounted on one side of the machine's working surface. This means that when changing the pneumatic shafts, the operator must remove the unwound substrate tube from the working surface, lift the new tube to the pneumatic shaft, and insert it into the shaft. During this operation, the frame and other components hinder the rewinding process, making it particularly troublesome when changing the tubes on higher-positioned pneumatic shafts. 2. To connect the substrates on the two pneumatic shafts, each pneumatic shaft typically requires independent cutting, clamping, and positioning components, resulting in a relatively complex machine structure. Utility Model Content

[0003] In view of the shortcomings of the background technology, the technical problem to be solved by the present invention is to provide a bag making machine unwinding device that is convenient for changing rolls and is used to solve the above problems.

[0004] To this end, the present invention is implemented by adopting the following scheme:

[0005] The unwinding device of a bag making machine which is convenient for changing rolls is characterized in that: it includes a rotating frame, the rotating frame is connected to a rotating drive assembly, the rotating frame is hinged with a first swing seat and a second swing seat, locking assemblies are provided corresponding to the first and second swing seats, the first swing seat is provided with a first inflatable shaft, the second swing seat is provided with a second inflatable shaft, a positioning seat is provided on the side of the inflatable shaft corresponding to the lower position, the positioning seat is provided with a clamping assembly for clamping the prepared substrate, a lifting seat is provided above the positioning seat, and the lifting seat is equipped with a pressing and cutting assembly that can press down and cut the substrate unrolled on the inflatable shaft in the upper position.

[0006] The rotation drive assembly includes a first motor, an output end of the first motor is connected to a first sprocket, the first sprocket is connected to a second sprocket through a chain, the second sprocket is connected to a rotating shaft on the rotating frame, and the frame rotatably supports the rotating shaft.

[0007] The locking assembly includes a locking block fixed on the first and second swing seats, a locking groove is opened in the middle of the locking block, and the locking groove is surrounded by the first locking arm and the second locking arm. A locking screw is rotatably provided on the first locking arm, and the locking screw is threadedly connected to the second locking arm. The first and second locking arms can be matched and approached so that the locking groove clamps the swing support shaft.

[0008] The lifting seat is connected to the piston rod of the first cylinder. The pressing and cutting assembly includes a cutting knife fixed on the lifting seat. A knife plate that can cooperate with the cutting knife is fixed on the positioning seat. The knife plate is provided with a makeshift groove for a spare substrate to pass through. The positioning seat is slidably set on the frame and connected to the mobile driving assembly.

[0009] The lifting seat is further provided with a pressing plate at the rear side of the cutting knife, and an elastic member is provided between the pressing plate and the lifting seat, and the pressing plate can press the substrate tightly onto the positioning seat.

[0010] The clamping assembly includes a clamping cylinder arranged on a positioning seat.

[0011] The unwinding device of the bag making machine that is convenient for roll changing of the above technical solution can realize the upper and lower position change of the air shaft by arranging both air shafts on the rotating frame, thereby realizing that only the air shaft in the upper position can be unwound. At the same time, this structure also makes it necessary to set up only one set of subsequent cutting, pressing and positioning components, thereby simplifying the structure of the equipment; at the same time, the air shaft is set on the corresponding swing seat. When the air shaft is rotated to the lower position, the swing seat can be controlled to swing the air shaft outward, so that the operator can change the roll on the outer side of the working surface, effectively reducing the interference of the frame and other components on the roll changing, and ensuring that the roll changing operation is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model has the following drawings:

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 This is a structural diagram of the second swing seat of the utility model;

[0015] Figure 3 This is a structural diagram of the locking block of the utility model;

[0016] Figure 4 This is a structural diagram of the lifting seat of the utility model;

[0017] Figure 5 This is a structural diagram of the blade of the utility model;

[0018] Figure 6 for Figure 1 A view from another perspective. DETAILED DESCRIPTION

[0019] As shown in the figure, the unwinding device of the bag making machine which is convenient for changing rolls disclosed by the utility model comprises a rotating frame 2, which is connected to a rotation driving assembly. Specifically, the rotation driving assembly comprises a first motor, and the output end of the first motor is connected to a first sprocket 27, the first sprocket 27 is connected to a second sprocket 6 through a chain, the second sprocket 6 is connected to a rotating shaft on the rotating frame 2, and the frame rotatably supports the rotating shaft. By controlling the first motor to start and transmitting through the sprocket chain, the rotating frame 2 can be driven to rotate. A first swing seat 3 and a second swing seat 7 are hinged on the rotating frame 2. Specifically, a first connecting seat 4 and a second connecting seat 9 are fixed on the rotating frame 2, and the first swing seat 3 is movably arranged at the first connecting seat 4 and the second connecting seat 9. On a connecting seat 4, the second swing seat 7 is movably arranged on the second connecting seat 9, and a locking assembly is provided corresponding to the first and second swing seats. Specifically, the locking assembly includes a locking block 17 fixed on the first and second swing seats, and a locking groove 20 is opened in the middle of the locking block. The locking groove 20 is surrounded by a first locking arm 21 and a second locking arm 22. A locking screw 19 is rotatably provided on the first locking arm 21, and the locking screw 19 is threadedly connected to the second locking arm 22. The first and second locking arms can cooperate to approach each other so that the locking groove 20 clamps the swing support shaft 18. By controlling the rotation of the locking screw 19, the first and second locking arms are driven to approach each other or the principle, thereby realizing the locking or loosening of the swing seat. A first pneumatic shaft 5 is provided on the first swing seat 3, a second pneumatic shaft 8 is provided on the second swing seat 7, a positioning seat 10 is provided on the side of the pneumatic shaft corresponding to the lower position, and a clamping assembly that can clamp the prepared substrate is provided on the positioning seat 10. Specifically, the clamping assembly includes a clamping cylinder 13 provided on the positioning seat 10. A lifting seat 15 is provided above the positioning seat 10, and a pressing and cutting assembly that can press down and cut the substrate unwound on the pneumatic shaft in the upper position is installed on the lifting seat 15. Specifically, the lifting seat 15 is connected to the piston rod of the first cylinder 16, and the cutting assembly includes a knife seat 26 fixed on the lifting seat 15, and a cutting knife 25 is provided on the knife seat 26. A knife plate 11 that can cooperate with the cutting knife 25 is fixed on the positioning seat 10, and a clearance groove 28 for the spare substrate to pass through is provided on the knife plate 11. The positioning seat 10 is slidably set on the frame and is connected to the mobile drive assembly. Specifically, a slide is provided on the positioning seat 10, and a slide rail 32 is provided corresponding to the slide. The mobile drive assembly includes a second cylinder 29, and the piston rod 31 of the second cylinder 29 is connected to the positioning seat 10. By controlling the action of the second cylinder 29, the positioning seat 10 can be driven to move. Furthermore, the lifting seat 15 is also provided with a pressing plate 24 on the rear side of the cutting knife 25. An elastic member 23 is provided between the pressing plate 24 and the lifting seat 15. The pressing plate 24 can press the substrate tightly against the bottom plate 12 on the positioning seat 10.

[0020] The working principle of this utility model is: Figure 1 For example, at this time, the substrate on the upper first inflatable shaft 5 is unwound, passing between the lifting seat 15 and the positioning seat 10 and passing through the guide roller 14 to unwind backward, while the starting end of the substrate on the lower second inflatable shaft 8 is first pulled to the positioning seat 10 and passes through the give way groove 28 on the knife plate 11, and then is clamped and positioned by the clamping cylinder 13. At this time, glue has been applied on the substrate. When the substrate on the first inflatable shaft 5 is about to be unwound, the lifting seat 15 is controlled to descend, and the pressing plate 24 will first press down the unwound substrate, so that the unwound substrate and the substrate on the positioning seat 10 are pressed between the pressing plate 24 and the bottom plate 12 to achieve rewinding. As the lifting seat 15 continues to descend, the elastic member 23 is squeezed, and the cutting knife 25 cooperates with the knife plate 11 to cut the unwound substrate. Then the clamping cylinder 13 releases the substrate. The lifting seat 15 rises and resets, and the second cylinder 29 drives the positioning seat 10 to move to the right, so that the substrate on the second air shaft 8 escapes from the yield groove 28 of the knife plate 11. Then the rotating frame 2 rotates 180 degrees, so that the second air shaft 8 rotates to the upper position to continue unwinding, and the first unwinding shaft 5 rotates to the lower position. At this time, the locking component of the first swing seat 3 can be loosened, and the first swing seat 3 is controlled to swing and drive the first unwinding shaft 5 to swing toward the outside of the frame, so that it is convenient for the operator to change the substrate on the first unwinding shaft 5. After the rewinding is completed, the first swing seat 3 is controlled to swing back and lock it. At this time, the positioning seat 10 has moved back and reset, and the substrate on the first air shaft 5 is pulled through the yield groove 28 of the knife plate 11 of the positioning seat 10, and is clamped and positioned by the clamping component to wait for the next reeling.

[0021] The structure of the present invention can realize the upper and lower position changes of the air shafts by arranging both air shafts on the rotating frame, thereby realizing that only the air shaft in the upper position can be unwound. At the same time, this structure also makes it necessary to set up only one set of subsequent cutting, pressing and positioning components, thereby simplifying the structure of the equipment; at the same time, the air shafts are arranged on the corresponding swing seats. When the air shafts are rotated to the lower position, the swing seats can be controlled to swing the air shafts outward, so that the operator can change the rolls on the outer side of the working surface, effectively reducing the interference of the frame and other components on the roll changing, and ensuring that the roll changing operation is more convenient.

Claims

1. The unwinding device of the bag making machine is convenient for changing rolls, and is characterized by: The invention comprises a rotating frame (2), wherein the rotating frame (2) is connected to a rotation drive assembly, a first swing seat (3) and a second swing seat (7) are hingedly connected to the rotating frame (2), and locking assemblies are provided corresponding to the first and second swing seats. A first air shaft (5) is provided on the first swing seat (3), and a second air shaft (8) is provided on the second swing seat (7). A positioning seat (10) is provided on one side of the air shaft at a lower position, and a clamping assembly capable of clamping a prepared substrate is provided on the positioning seat (10). A lifting seat (15) is provided above the positioning seat (10), and a pressing and cutting assembly capable of pressing down and cutting the substrate unwound on the air shaft at an upper position is installed on the lifting seat (15).

2. The unwinding device for bag making machine for convenient roll change according to claim 1, characterized in that: The rotation drive assembly comprises a first motor, the output end of the first motor is connected to a first sprocket (27), the first sprocket (27) is connected to a second sprocket (6) via a chain, the second sprocket (6) is connected to a rotating shaft on the rotating frame (2), and the frame rotatably supports the rotating shaft.

3. The unwinding device for bag making machine for convenient roll change according to claim 1, characterized in that: The locking assembly includes a locking block (17) fixed on the first and second swing seats, a locking groove (20) is provided in the middle of the locking block, and the locking groove (20) is surrounded by a first locking arm (21) and a second locking arm (22). A locking screw (19) is rotatably provided on the first locking arm (21), and the locking screw (19) is screwed to the second locking arm (22). The first and second locking arms can be matched and approached so that the locking groove (20) clamps the swing support shaft (18).

4. The unwinding device for bag making machine for convenient roll change according to claim 1, characterized in that: The lifting seat (15) is connected to the piston rod of the first cylinder (16); the pressing and cutting assembly includes a cutting knife (25) fixed on the lifting seat (15); a knife plate (11) that can cooperate with the cutting knife (25) is fixedly provided on the positioning seat (10); a clearance groove (28) for a spare substrate to pass through is provided on the knife plate (11); the positioning seat (10) is slidably provided on the frame and is connected to the mobile driving assembly.

5. The unwinding device for bag making machine for convenient roll change according to claim 4, characterized in that: The lifting seat (15) is further provided with a pressing plate (24) on the rear side of the cutting knife (25), and an elastic member (23) is provided between the pressing plate (24) and the lifting seat (15). The pressing plate (24) can press the substrate onto the positioning seat (10).

6. The unwinding device for bag making machine for convenient roll change according to claim 1, characterized in that: The clamping assembly comprises a clamping cylinder (13) arranged on a positioning seat (10).

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