Film releasing device of vertical packaging machine

Abstract

The utility model provides a film releasing device of a vertical packaging machine, which relates to the technical field of film releasing equipment of packaging machines, and comprises a support frame, a hollow film releasing roller is fixed on one side of the support frame, a through hole is arranged at one end of the hollow film releasing roller, a fixed baffle ring is fixed on the surface of the hollow film releasing roller, and the hollow film releasing roller is provided with a through hole. A motor is fixed to the side face of the top of the supporting frame, a lead screw is fixed to an output shaft of the motor, a moving block and a trapezoidal check block are driven to move left and right in the hollow film unwinding roller with the help of the motor and the lead screw, and when the moving block moves towards or away from a penetrating opening, the trapezoidal check block pops up at the penetrating opening or is gradually collected into the hollow film unwinding roller. In this way, the plastic roll film can be conveniently positioned, meanwhile, the trapezoidal check block does not need to be manually assembled and disassembled in the replacement process, and operation is more convenient and faster.

Description

Technical Field

[0001] The utility model relates to the technical field of film feeding devices of packaging machines, in particular to a film feeding device for a vertical packaging machine. Background Art

[0002] During the packaging process of a vertical packaging machine, it is carried out by a material stretching and feeding device. The plastic film passes through a film cylinder to form a tube shape, and the side is sealed by a thermal longitudinal sealing device. At the same time, the packaging is injected into the bag, and the transverse sealing mechanism cuts the packaging length and position according to the color mark photoelectric detection device.

[0003] However, in the prior art, some existing vertical packaging machines use manually loaded and unloaded stoppers to position the plastic roll film on the film feeding roller. But when the plastic roll film needs to be replaced after it is used up, the manually loaded and unloaded stopper also needs to be manually disassembled and installed together with it, resulting in a troublesome and inconvenient replacement process of the plastic roll film. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the disadvantages existing in the prior art: some vertical packaging machines use manually loaded and unloaded stoppers to position the plastic roll film on the film feeding roller. But when the plastic roll film needs to be replaced after it is used up, the manually loaded and unloaded stopper also needs to be manually disassembled and installed together with it, resulting in a troublesome and inconvenient replacement process of the plastic roll film.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a film feeding device for a vertical packaging machine, including a support frame, one side of the support frame is fixed with a hollow film feeding roller, and a through hole is opened at one end of the hollow film feeding roller. A fixed retaining ring is fixed on the surface of the hollow film feeding roller. A motor is fixed on the top side of the support frame, and a lead screw is fixed at the output shaft of the motor. The lead screw penetrates through the support frame and is rotationally connected with the hollow film feeding roller. A moving block is threadedly connected to the surface of the lead screw, and a trapezoidal stopper slides through the moving block. The trapezoidal stopper is slidably connected to the inner surface of the hollow film feeding roller. A circular groove is opened in the trapezoidal stopper, and a spring is fixed on the surface of the circular groove. One end of the spring is fixedly connected to the moving block. Anti-shift blocks are fixed on both sides of the trapezoidal stopper, and the anti-shift blocks are slidably connected in the moving block.

[0006] As a preferred implementation manner, a guide roller is rotatably connected to the lower position of the hollow film feeding roller on one side surface of the support frame, and a limiting member is fixedly connected to the surface of the guide roller.

[0007] As a preferred implementation manner, a through port is opened on the hollow film feeding roller, and an electric telescopic rod is fixedly connected to the inner surface of the hollow film feeding roller below the square through port.

[0008] As a preferred implementation, the telescopic end of the electric telescopic rod is fixedly connected with an extruded arc piece.

[0009] Compared with the prior art, the advantages and positive effects of the utility model are:

[0010] The utility model drives the moving block and the trapezoidal stopper to move left and right in the hollow film-releasing roller with the help of the motor and the screw rod. When the moving block moves to the left, the trapezoidal stopper moves to the through-hole of the hollow film-releasing roller, and the trapezoidal stopper is automatically popped out from the through-hole with the help of the spring rebound. The popped-out trapezoidal stopper cooperates with the fixed stop ring to position the plastic film roll placed therebetween. When the moving block moves to the right, the inclined surface of the trapezoidal stopper is pressed so that the whole block gradually moves into the hollow film-releasing roller and is then completely retracted into the hollow film-releasing roller, which facilitates the replacement of the plastic film roll. This eliminates the need to manually assemble and disassemble the trapezoidal stopper during the replacement of the plastic film roll, making the operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of a film placing device of a vertical packaging machine provided by the utility model;

[0012] Figure 2 A schematic diagram of the structure inside a film placing roller of a film placing device of a vertical packaging machine provided by the utility model;

[0013] Figure 3 The utility model provides a schematic diagram of the structure inside a moving block of a film placing device of a vertical packaging machine.

[0014] Legend:

[0015] 1. Support frame; 2. Hollow film-releasing roller; 3. Fixed baffle ring; 4. Guide roller; 5. Limiting piece; 6. Motor; 7. Screw rod; 8. Electric telescopic rod; 9. Extrusion arc piece; 10. Moving block; 11. Trapezoidal baffle; 12. Spring; 13. Shifting block. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] Example 1

[0018] like Figures 1-3As shown in the figure, the present utility model provides a technical solution: a film feeding device for a vertical packaging machine, including a support frame 1. One side of the support frame 1 is fixed with a hollow film feeding roller 2, which is used to place a plastic roll film. One end of the hollow film feeding roller 2 is provided with a through hole. A fixed retaining ring 3 is fixed on the surface of the hollow film feeding roller 2. Through the cooperation of the fixed retaining ring 3 and a trapezoidal block 11 ejected from the through hole, the plastic roll film between them is positioned. On the top side of the support frame 1, a motor 6 is fixed, and a lead screw 7 is fixed at the output shaft of the motor 6. The lead screw 7 penetrates through the support frame 1 and is rotatably connected to the hollow film feeding roller 2. A moving block 10 is threadedly connected to the surface of the lead screw 7, and a trapezoidal block 11 slides through the moving block 10. The trapezoidal block 11 is slidably connected to the inner surface of the hollow film feeding roller 2. With the help of the motor 6 and the lead screw 7, the moving block 10 and the trapezoidal block 11 are driven to move left and right in the hollow film feeding roller 2. A circular groove is provided in the trapezoidal block 11, and a spring 12 is fixed on the surface of the circular groove. One end of the spring 12 is fixedly connected to the moving block 10. When the moving block 10 and the trapezoidal block 11 move towards the through hole, the spring 12 plays a role in automatically ejecting the trapezoidal block 11 from the through hole. On both sides of the trapezoidal block 11, anti-shift blocks 13 are fixed, and the anti-shift blocks 13 are slidably connected to the moving block 10. The anti-shift blocks 13 play a role in limiting the movement of the trapezoidal block 11 to prevent the trapezoidal block 11 from being over-ejected outwards.

[0019] Embodiment 2

[0020] As Figures 1-3 shown, on one side surface of the support frame 1 below the hollow film feeding roller 2, a guide roller 4 is rotatably connected. The guide roller 4 plays a role in guiding and straightening the plastic film pulled out from the plastic roll film. And a limiting member 5 is fixedly connected to the surface of the guide roller 4. The limiting member 5 plays a role in positioning the plastic film. A through port is provided on the hollow film feeding roller 2, and an electric telescopic rod 8 is fixedly connected to the inner surface of the hollow film feeding roller 2 below the square through port. By extending the electric telescopic rod 8, the paper core shaft of the plastic roll film is extruded, so that the plastic roll film can stop rotating in time during normal rotary feeding, reducing the occurrence of slipping. The telescopic end of the electric telescopic rod 8 is fixedly connected with an extrusion arc piece 9. The extrusion arc piece 9 plays a role in increasing the extrusion area of the electric telescopic rod 8 on the plastic roll film, making it easier for the electric telescopic rod 8 to stop the plastic roll film from rotating.

[0021] Working principle:

[0022] As Figures 1-3As shown in the figure, when the utility model is in use and the user needs to replace the plastic winding film on the hollow film releasing roller 2, first start the motor 6 to drive the lead screw 7 to rotate, so that the moving block 10 and the trapezoidal stop block 11 move towards the right side of the through hole on the hollow film releasing roller 2. During this period, the inclined surface of the trapezoidal stop block 11 is pressed, causing its whole body to gradually move into the hollow film releasing roller 2, and the spring 12 is squeezed and contracted. After the moving block 10 moves a certain distance, the trapezoidal stop block 11 is completely retracted into the hollow film releasing roller 2. At this time, the paper core shaft of the plastic winding film can be taken out from one side of the hollow film releasing roller 2. Then, insert the new plastic winding film on the hollow film releasing roller 2 and push one end of it to the fixed retaining ring 3. Then, reverse the lead screw 7 to make the moving block 10 and the trapezoidal stop block 11 move towards the through hole. When the trapezoidal stop block 11 moves to the through hole, with the help of the spring 12 rebounding, the trapezoidal stop block 11 is automatically ejected from the through hole, and the ejected trapezoidal stop block 11 cooperates with the fixed retaining ring 3 to position the plastic winding film placed between them.

[0023] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present utility model, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A film feeding device for a vertical packaging machine, comprising a support frame (1), characterized in that: One side of the support frame (1) is fixedly provided with a hollow film unwinding roller (2), and one end of the hollow film unwinding roller (2) is provided with a through opening. A fixed retaining ring (3) is fixedly arranged on the surface of the hollow film unwinding roller (2). The top side of the support frame (1) is fixedly provided with a motor (6), and a lead screw (7) is fixedly arranged at the output shaft of the motor (6). The lead screw (7) penetrates through the support frame (1) and is rotationally connected with the hollow film unwinding roller (2). A moving block (10) is in threaded connection with the surface of the lead screw (7), and a trapezoidal stop block (11) is slidably penetrated through the moving block (10). The trapezoidal stop block (11) is slidably connected to the inner surface of the hollow film unwinding roller (2). A circular groove is formed in the trapezoidal stop block (11), and a spring (12) is fixedly arranged on the surface of the circular groove. One end of the spring (12) is fixedly connected with the moving block (10). Two sides of the trapezoidal stop block (11) are fixedly provided with displacement blocking blocks (13), and the displacement blocking blocks (13) are slidably connected in the moving block (10).

2. The film feeding device of a vertical packaging machine according to claim 1, characterized in that: A guiding roller (4) is rotationally connected to a position below the hollow film unwinding roller (2) on one side surface of the support frame (1), and a limiting member (5) is fixedly connected to the surface of the guiding roller (4).

3. The film feeding device of a vertical packaging machine according to claim 1, characterized in that: A through opening is formed in the hollow film unwinding roller (2), and an electric telescopic rod (8) is fixedly connected to the inner surface of the hollow film unwinding roller (2) below the square through opening.

4. The film feeding device of a vertical packaging machine according to claim 3, characterized in that: The telescopic end of the electric telescopic rod (8) is fixedly connected with a pressing arc piece (9).

Images