Winding machine film stretching device capable of automatically penetrating film

Abstract

The utility model relates to the technical field of packaging equipment, in particular to an automatic film penetrating winding machine film stretching device which comprises a stretching box, a film inlet and a belt passing hole are formed in one side of the stretching box, a film outlet is formed in the other side of the stretching box, a mounting plate is arranged at the bottom of the stretching box, and a film material frame is installed on the mounting plate. A film inlet roller, a first stretching roller, a second stretching roller and a film outlet roller are rotationally connected into the stretching box, the film inlet roller is located at the film inlet, the film outlet roller is located at the film outlet, a film penetrating belt is wound around the film inlet roller, the first stretching roller, the second stretching roller and the film outlet roller in a transmission mode, the film penetrating belt penetrates through the belt passing hole, and a rotating driver is arranged at the top of the stretching box. A transmission assembly is arranged between the top end of the first stretching roller and the top end of the second stretching roller in a transmission mode, the rotating driver drives the first stretching roller and the second stretching roller to rotate through the transmission assembly, and the rotating speed of the first stretching roller is smaller than that of the second stretching roller. Automatic film penetrating of the film is achieved, the film penetrating efficiency is high, and film roll materials are convenient to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging equipment, in particular to a film stretching device of a winding machine with automatic film threading. Background Art

[0002] For the film stretching devices of winding machines on the market, manual film threading is required. In the existing patent, the Chinese patent document with the application number 200720052082.X applied by the applicant discloses a new type of film stretching device for a winding machine, which includes a chassis. A film fixing rod and a transmission rod fixing frame are provided on the chassis. A transmission rod is installed between the transmission rod fixing frame and the chassis; a rotating frame is installed on the transmission rod fixing frame, and an auxiliary transmission rod is installed on the rotating frame; the film passes through between the auxiliary transmission rod and the transmission rod. When threading the film, it is necessary to first open the rotating frame, then thread the film through between the auxiliary transmission rod and the transmission rod, and finally cover the rotating frame on the transmission rod fixing frame. This patent document uses manual film threading, which is inconvenient and has low film threading efficiency. Therefore, the defect is very obvious and a solution is urgently needed. Content of the Utility Model

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a film stretching device of a winding machine with automatic film threading.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A film stretching device of a winding machine with automatic film threading, which includes a stretching box. An inlet for the film and a belt passing hole are provided on one side of the stretching box, and an outlet for the film is provided on the other side of the stretching box. An installation plate is provided at the bottom of the stretching box, and a film material rack is installed on the installation plate. An inlet film roller, a first stretching roller, a second stretching roller and an outlet film roller are rotatably connected in the stretching box. The inlet film roller is located at the inlet for the film, and the outlet film roller is located at the outlet for the film. A threading belt is driven and wound around the tops of the inlet film roller, the first stretching roller, the second stretching roller and the outlet film roller. The threading belt passes through the belt passing hole. A rotating drive is installed on the top of the stretching box. A transmission component is provided between the top ends of the first stretching roller and the second stretching roller. The rotating drive drives the first stretching roller and the second stretching roller to rotate through the transmission component. The rotation speed of the first stretching roller is less than the rotation speed of the second stretching roller.

[0006] Further, a plurality of tension wheels are rotatably connected to the stretching box, and the tension wheels are used to provide a tension force to the threading belt.

[0007] Further, a chamfered corner is provided on one side of the stretching box close to the inlet for the film, and one of the tension wheels is located at the chamfered corner and is correspondingly arranged with the belt passing hole.

[0008] Further, a film material fixing part is provided on the threading belt.

[0009] Further, the film fixing part includes at least one film pulling groove formed in the film threading belt.

[0010] Further, a winding film roller is rotatably connected inside the stretching box, and the film threading belt is drivingly wound around the top of the winding film roller.

[0011] Further, the stretching box includes a box body and a box cover. The box body is provided with an inner cavity with a side opening, and the box cover is installed at the side opening of the box body. The box cover and the box body enclose an inlet film port and an outlet film port. The belt passing hole is located on one side of the box cover close to the inlet film port. The inlet film roller, the first stretching roller, the second stretching roller and the outlet film roller are all located inside the inner cavity.

[0012] Further, the transmission assembly includes a first gear sleeved on the top end of the first stretching roller, a second gear sleeved on the top end of the second stretching roller, and a transition gear meshing and driving with the first gear and the second gear. The diameter of the first gear is larger than that of the second gear; the rotating end of the rotating driver is drivingly connected to the first stretching roller.

[0013] Further, a protective cover covering the rotating driver is installed on the top of the stretching box.

[0014] The beneficial effects of the present utility model: In practical applications, the film roll is installed on the film material rack and used to release the film. The film of the film roll enters from the inlet film port, and after the film sequentially winds around the inlet film roller, the first stretching roller, the second stretching roller and the outlet film roller, the film exits from the outlet film port. As the winding machine works, the film winds around the product; during this process, the rotating driver drives the first stretching roller and the second stretching roller to rotate via the transmission assembly, and the rotating first stretching roller and second stretching roller stretch the film under the action of the rotational speed difference. When threading the film, the film is connected to the film threading belt at the inlet film port. As the rotating driver drives the first stretching roller and the second stretching roller to rotate via the transmission assembly, the rotating first stretching roller and second stretching roller will drive the film threading belt to rotate, and the rotating film threading belt drives the film to sequentially wind around the inlet film roller, the first stretching roller, the second stretching roller and the outlet film roller, and finally pulls out the film after winding around the outlet film roller from the outlet film port to complete the automatic film threading. The present utility model can realize the automatic film threading, improve the threading efficiency, and facilitate the replacement of the film roll. Description of the Drawings

[0015] Figure 1 is a three-dimensional structural schematic diagram of the present utility model.

[0016] Figure 2 is a three-dimensional structural schematic diagram of the present utility model after hiding the protective cover.

[0017] Figure 3 is a three-dimensional structural schematic diagram of the present utility model after hiding the protective cover and the box cover.

[0018] Description of the reference numerals:

[0019] 1. Tension box; 2. Film inlet; 3. Belt passing hole; 4. Film outlet; 5. Mounting plate; 6. Film material rack; 7. Film inlet roller; 8. First tension roller; 9. Second tension roller; 10. Film outlet roller; 11. Film threading belt; 13. Rotating drive; 14. Transmission assembly; 15. Tensioning wheel; 16. Chamfering position; 17. Film material fixing part; 18. Film winding roller; 19. Box body; 20. Box cover; 21. Inner cavity; 22. First gear; 24. Protective cover; 25. Second gear. Detailed implementation manners

[0020] For the convenience of understanding by those skilled in the art, the present utility model will be further described below in conjunction with the embodiments and the accompanying drawings. The content mentioned in the implementation manners does not limit the present utility model.

[0021] As Figures 1 to 3 shown, a film stretching device for an automatic film threading winding machine provided by the present utility model includes a tension box 1. A film inlet 2 and a belt passing hole 3 are provided on one side of the tension box 1, a film outlet 4 is provided on the other side of the tension box 1, a mounting plate 5 is provided at the bottom of the tension box 1, a film material rack 6 is installed on the mounting plate 5, a film inlet roller 7, a first tension roller 8, a second tension roller 9 and a film outlet roller 10 are rotatably connected in the tension box 1. The film inlet roller 7 is located at the film inlet 2, the film outlet roller 10 is located at the film outlet 4. A film threading belt 11 is wound around the tops of the film inlet roller 7, the first tension roller 8, the second tension roller 9 and the film outlet roller 10 in a transmission manner. The film threading belt 11 passes through the belt passing hole 3. A rotating drive 13 is installed on the top of the tension box 1. A transmission assembly 14 is provided between the top ends of the first tension roller 8 and the second tension roller 9 in a transmission manner. The rotating drive 13 drives the first tension roller 8 and the second tension roller 9 to rotate via the transmission assembly 14. The diameter of the first tension roller 8 is smaller than that of the second tension roller 9, and the rotation speed of the first tension roller 8 is lower than that of the second tension roller 9.

[0022] In actual application, the film roll is installed on the film material rack 6 and used to release the film. The film of the film roll enters the film inlet 2, and the film is wound around the film inlet roller 7, the first stretching roller 8, the second stretching roller 9, and the film outlet roller 10 in sequence, and then the film is discharged from the film outlet 4. As the winding machine works, the film is wound on the product; during this process, the rotary driver 13 drives the first stretching roller 8 and the second stretching roller 9 to rotate via the transmission assembly 14. The rotating first stretching roller 8 and the second stretching roller 9 stretch the film due to the speed difference. During film threading, the film is connected to the film threading belt 11 at the film inlet 2. As the rotary driver 13 drives the first stretching roller 8 and the second stretching roller 9 to rotate via the transmission assembly 14, the rotating first stretching roller 8 and the second stretching roller 9 will drive the film threading belt 11 to rotate. The rotating film threading belt 11 drives the film to wrap around the film inlet roller 7, the first stretching roller 8, the second stretching roller 9, and the film outlet roller 10 in sequence. Finally, the film that has wrapped around the film outlet roller 10 is pulled out of the film outlet 4 to complete the film automatic threading. The utility model can realize automatic film threading of the film, has a high degree of automation, improves the efficiency of film threading, and is convenient for replacing film rolls.

[0023] In this embodiment, the stretching box 1 is rotatably connected to a plurality of tensioning wheels 15 , which are used to provide tensioning force to the film-penetrating belt 11 , thereby ensuring the tension of the film-penetrating belt 11 and improving the working stability of the film-penetrating belt 11 .

[0024] In this embodiment, a cutting position 16 is provided on the side of the stretching box 1 near the film inlet 2. A tensioning pulley 15 is located at the cutting position 16 and corresponds to the belt hole 3. This structural design allows a portion of the film threading belt 11 to be exposed, making it easier for the operator to connect the film to the film threading belt 11 and facilitating smooth film threading.

[0025] In this embodiment, the film-threading belt 11 is provided with a film material fixing portion 17. The film material fixing portion 17 is used to fix the film, thereby improving the stability of the film-threading belt 11 in pulling the film to move, thereby stably completing the film-threading work.

[0026] In this embodiment, the film material fixing portion 17 includes at least one film drawing groove provided in the film threading belt 11. The film is first rolled up in the width direction into a roughly strip-shaped ball, and then the strip of film is hung in the film drawing groove or passed through several film drawing grooves to achieve connection between the film and the film threading belt 11, thereby preventing the film from easily detaching from the film threading belt 11 during film threading.

[0027] In this embodiment, a film winding roller 18 is rotatably connected to the stretching box 1, and the film threading belt 11 is driven and wound on the top of the film winding roller 18. This structural design improves the stability of the film movement.

[0028] In this embodiment, the stretching box 1 includes a box body 19 and a box cover 20. The box body 19 is provided with an inner cavity 21 with a side opening. The box cover 20 is installed at the side opening of the box body 19. The box cover 20 and the box body 19 enclose a film inlet 2 and a film outlet 4. The belt passing hole 3 is located on the side of the box cover 20 close to the film inlet 2. The film inlet roller 7, the first stretching roller 8, the second stretching roller 9 and the film outlet roller 10 are all located in the inner cavity 21.

[0029] In this embodiment, the transmission assembly 14 includes a first gear 22 sleeved on the top end of the first stretching roller 8, a second gear 25 sleeved on the top end of the second stretching roller 9, and an intermediate gear meshing with and driving the first gear 22 and the second gear 25. The diameter of the first gear 22 is larger than that of the second gear 25. The intermediate gear is rotatably connected to the top of the stretching box 1. The rotating end of the rotating driver 13 is drivingly connected to the first stretching roller 8. The rotating driver 13 is used to drive the first stretching roller 8 to rotate. The rotating direction of the first stretching roller 8 is opposite to that of the second stretching roller 9. With this structural design, the rotational speed of the first stretching roller 8 is less than that of the second stretching roller 9. The film is stretched under the action of the first stretching roller 8 and the second stretching roller 9 and then output through the film outlet 4.

[0030] In this embodiment, a protective cover 24 covering the rotating driver 13 is installed on the top of the stretching box 1. The protective cover 24 plays a role in protecting the rotating driver 13. Specifically, the protective cover 24 is provided with heat dissipation holes for heat dissipation.

[0031] Specifically, the rotating driver 13 can be composed of a motor and a reducer.

[0032] All the technical features in this embodiment can be freely combined according to actual needs.

[0033] The above embodiment is a preferred implementation solution of the present utility model. In addition, the present utility model can also be implemented in other ways. Any obvious replacement without departing from the concept of the technical solution is within the protection scope of the present utility model.

Claims

1. A film stretching device for an automatic film-wrapping winding machine, characterized in that: The invention comprises a stretching box (1), wherein a film inlet (2) and a belt hole (3) are provided on one side of the stretching box (1), a film outlet (4) is provided on the other side of the stretching box (1), a mounting plate (5) is provided at the bottom of the stretching box (1), a film material rack (6) is installed on the mounting plate (5), a film feed roller (7), a first stretching roller (8), a second stretching roller (9) and a film outlet roller (10) are rotatably connected in the stretching box (1), the film feed roller (7) is located at the film inlet (2), the film outlet roller (10) is located at the film outlet (4), the film feed roller (7), the first stretching roller (8), the second stretching roller (9) and the film outlet roller (10) are rotatably connected in the stretching box (1), The stretching roller (8), the second stretching roller (9) and the film discharge roller (10) are driven by a film-piercing belt (11), which passes through the belt hole (3). A rotation driver (13) is installed on the top of the stretching box (1). A transmission component (14) is provided between the top of the first stretching roller (8) and the top of the second stretching roller (9). The rotation driver (13) drives the first stretching roller (8) and the second stretching roller (9) to rotate via the transmission component (14). The rotation speed of the first stretching roller (8) is less than that of the second stretching roller (9).

2. The film stretching device of the winding machine for automatic film threading according to claim 1, wherein: The stretching box (1) is rotatably connected to a plurality of tensioning wheels (15), and the tensioning wheels (15) are used to provide tensioning force to the film-threading belt (11).

3. The film stretching device of the winding machine with automatic film threading according to claim 2, characterized in that: A cutting position (16) is provided on one side of the stretching box (1) close to the film inlet (2), and one of the tensioning wheels (15) is located at the cutting position (16) and is arranged corresponding to the belt hole (3).

4. The film stretching device of a winding machine with automatic film threading according to claim 1, characterized in that: The film-threading belt (11) is provided with a film material fixing portion (17).

5. The film stretching device of the winding machine for automatic film threading according to claim 4, characterized in that: The film material fixing portion (17) comprises at least one film drawing groove opened on the film passing belt (11).

6. The film stretching device of the winding machine for automatic film threading according to claim 1, characterized in that: A film winding roller (18) is rotatably connected in the stretching box (1), and the film threading belt (11) is driven and wound around the top of the film winding roller (18).

7. The film stretching device of the winding machine for automatic film threading according to claim 1, characterized in that: The stretching box (1) comprises a box body (19) and a box cover (20). The box body (19) is provided with an inner cavity (21) with a side opening. The box cover (20) is installed at the side opening of the box body (19). The box cover (20) and the box body (19) are arranged to form a film inlet (2) and a film outlet (4). The belt hole (3) is located on the side of the box cover (20) close to the film inlet (2). The film inlet roller (7), the first stretching roller (8), the second stretching roller (9) and the film outlet roller (10) are all located in the inner cavity (21).

8. The film stretching device of a winding machine with automatic film threading according to claim 1, characterized in that: The transmission assembly (14) comprises a first gear (22) fitted on the top end of the first stretching roller (8), a second gear (25) fitted on the top end of the second stretching roller (9), and a transition gear meshing with the first gear (22) and the second gear (25) for transmission, wherein the diameter of the first gear (22) is larger than the diameter of the second gear (25); and the rotating end of the rotary driver (13) is drivingly connected to the first stretching roller (8).

9. The film stretching device of the winding machine for automatic film threading according to claim 1, characterized in that: The top of the stretching box (1) is provided with a protective cover (24) which is arranged outside the rotating driver (13).

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