A packaging film pulling mechanism for a screw plastic packaging machine

Abstract

The utility model discloses a kind of packing film pulling film mechanisms for screw plastic packaging machine, including rack, the side of rack is provided with film pulling wheel assembly, the film pulling wheel assembly includes two film pulling wheels and the driving mechanism of driving two film pulling wheels rotation, the center of each film pulling wheel is provided with a film pulling shaft, one of film pulling shaft is inserted into rack and is connected with the driving mechanism, another film pulling shaft is inserted into rack and is rotatably connected with a swing support, cylinder is provided in rack, the piston rod of cylinder is connected with swing bar, the other end of swing bar is connected with swing arm, the other end of swing arm is connected with the side of swing support, the upper end of swing support is hinged on the rack, the lower end of swing support is provided with arc sliding groove, positioning rod is inserted in the arc sliding groove, the other end of positioning rod is placed on the rack. The structure realizes the automatic adjustment of the distance between two film pulling wheels.

Description

Technical Field

[0001] This utility model relates to the technical field of screw packaging equipment, specifically a packaging film stretching mechanism for a screw sealing machine. Background Technology

[0002] Screw packaging machines are machines that can automatically sort, count, and package products with regular shapes such as screws and nuts. Their functional structure mainly consists of a hopper, chassis, PLC control system, fiber optic counting system, pneumatic device, plastic sealant, and other supporting components.

[0003] Existing screw packaging machines generally include a film-rolling mechanism for folding the packaging film on both sides, a film-pulling mechanism for pulling down the rolled-up film, and a heat-sealing and cutting mechanism for heat-sealing and cutting the packaging film containing the screws. The film-pulling mechanism mainly consists of two pulling rollers and a drive motor that rotates them. During initial use, the two pulling rollers need to be separated before the packaging film can be secured between them. Therefore, an adjustable distance between the two pulling rollers is required. Currently, an eccentric wheel is used, and the distance between the two pulling rollers is adjusted manually during operation. This method is relatively inconvenient and inefficient, therefore, improvement is needed. Utility Model Content

[0004] The purpose of this utility model is to provide a packaging film pulling mechanism for a screw sealing machine to solve the problems mentioned in the background art, which are that the existing method of adjusting the distance between two film pulling rollers is manually adjusted, resulting in inconvenient operation and low work efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a film-pulling mechanism for a screw sealing machine, comprising a frame, a film-pulling wheel assembly on the side of the frame, the film-pulling wheel assembly comprising two film-pulling wheels and a drive mechanism for driving the two film-pulling wheels to rotate, a film-pulling shaft at the center of each film-pulling wheel, one film-pulling shaft being inserted into the frame and connected to the drive mechanism, and the other film-pulling shaft being inserted into the frame and rotatably connected to a swing bracket, a cylinder being disposed within the frame, a swing rod being connected to the piston rod of the cylinder, the other end of the swing rod being connected to a swing arm, the other end of the swing arm being connected to the side of the swing bracket, the upper end of the swing bracket being hinged to the frame, and an arc-shaped sliding groove being provided at the lower end of the swing bracket, a positioning rod being inserted into the arc-shaped sliding groove, the other end of the positioning rod being placed on the frame.

[0006] Preferably, for the convenience of operation, with fewer components and a simple structure, the drive mechanism includes a drive motor and a main transmission gear. The output shaft of the drive motor is connected to the main transmission gear. A positioning seat is provided on a film pulling shaft connected to the drive mechanism. A first auxiliary transmission gear is provided at one end of the positioning seat away from the film pulling wheel. One side of the first auxiliary transmission gear meshes with the main transmission gear. A second auxiliary transmission gear is provided at one end of the swing bracket away from the film pulling wheel. The other side of the first auxiliary transmission gear meshes with the second auxiliary transmission gear.

[0007] Preferably, for the convenience of installation, the drive motor is fixed on a cross plate. A longitudinal plate is connected to one side of the cross plate away from the drive motor. An installation bottom plate is connected to one side of the longitudinal plate away from the cross plate. The installation bottom plate is fixed on the machine frame. The film pulling shafts all penetrate through the installation bottom plate, and the positioning seat is placed on the installation bottom plate. The positioning rod is placed on the installation bottom plate.

[0008] Preferably, for the convenience of installation, the top of the air cylinder is connected with a "C"-shaped air cylinder seat, and the "C"-shaped air cylinder seat is fixed on the machine frame through a connecting plate.

[0009] Preferably, the swing arm includes an L-shaped support and a hinge seat. The hinge seat is provided at one end of the L-shaped support. The hinge seat is hinged to the swing rod. The other end of the L-shaped support is connected to the side of the swing bracket.

[0010] The beneficial effect of the present utility model is that this structure can automatically adjust the distance between the two film pulling wheels, which is convenient for users to operate. Compared with the method of manually adjusting one of the film pulling wheels, this structure is faster and more efficient in operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural view of a packaging film pulling mechanism for a screw plastic sealing machine in Embodiment 1 Figure 1 ;

[0012] Figure 2 is a schematic structural view of a packaging film pulling mechanism for a screw plastic sealing machine in Embodiment 1 Figure 2 ;

[0013] Figure 3 is Figure 2 an enlarged view of A in

[0014] Figure 4 is a schematic structural view of a packaging film pulling mechanism for a screw plastic sealing machine in Embodiment 1 Figure 3 ;

[0015] Figure 5 is a schematic structural view of the film pulling wheel assembly in Embodiment 1;

[0016] Figure 6 For Figure 4 the enlarged view of part B.

[0017] In the figure: frame 1, film pulling wheel 2, film pulling shaft 3, swing bracket 4, air cylinder 5, swing rod 6, swing arm 7, L-shaped support 701, hinge seat 702, arc-shaped sliding groove 8, positioning rod 9, driving motor 10, main transmission gear 11, positioning seat 12, first auxiliary transmission gear 13, second auxiliary transmission gear 14, cross plate 15, longitudinal plate 16, mounting base plate 17, "C"-shaped air cylinder seat 18, connecting plate 19. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0019] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plural" means two or more, unless otherwise specifically defined.

[0020] Embodiment 1

[0021] Please refer to Figures 1-6As shown, a film pulling mechanism for a screw plastic sealing machine disclosed in this embodiment includes a frame 1. A film pulling wheel assembly is provided on the side of the frame 1. The film pulling wheel assembly includes two film pulling wheels 2 and a driving mechanism for driving the two film pulling wheels 2 to rotate. A film pulling shaft 3 is provided at the center of each film pulling wheel 2. One of the film pulling shafts 3 is connected to the driving mechanism after being inserted into the frame 1, and the other film pulling shaft 3 is rotatably connected to a swing bracket 4 after being inserted into the frame 1. A cylinder 5 is provided in the frame 1. For the convenience of installation, the top of the cylinder 5 is connected to a "C"-shaped cylinder seat 18, and the "C"-shaped cylinder seat 18 is fixed to the frame 1 through a connecting plate 19. A swing rod 6 is connected to the piston rod of the cylinder 5. The other end of the swing rod 6 is connected to a swing arm 7, and the other end of the swing arm 7 is connected to the side of the swing bracket 4. Among them, the swing arm 7 includes an L-shaped support 701 and a hinge seat 702. The hinge seat 702 is provided at one end of the L-shaped support 701, and the hinge seat 702 is hinged to the swing rod 6. The other end of the L-shaped support 701 is connected to the side of the swing bracket 4. The upper end of the swing bracket 4 is hinged to the frame 1, and an arc-shaped sliding groove 8 is provided at the lower end of the swing bracket 4. A positioning rod 9 is inserted into the arc-shaped sliding groove 8, and the other end of the positioning rod 9 is placed on the frame 1.

[0022] Preferably, for the convenience of operation, with fewer components and a simple structure, the driving mechanism includes a driving motor 10 and a main transmission gear 11. For the convenience of installation, the driving motor 10 is fixed on a cross plate 15. A longitudinal plate 16 is connected to the side of the cross plate 15 away from the driving motor 10. An installation bottom plate 17 is connected to the side of the longitudinal plate 16 away from the cross plate 15, and the installation bottom plate 17 is fixed to the frame 1. The output shaft of the driving motor 10 is connected to the main transmission gear 11. A positioning seat 12 is provided on one of the film pulling shafts 3 connected to the driving mechanism. A first auxiliary transmission gear 13 is provided at the end of the positioning seat 12 away from the film pulling wheel 2. One side of the first auxiliary transmission gear 13 meshes with the main transmission gear 11. A second auxiliary transmission gear 14 is provided at the end of the swing bracket 4 away from the film pulling wheel 2. The other side of the first auxiliary transmission gear 13 meshes with the second auxiliary transmission gear 14. And the film pulling shafts 3 all penetrate through the installation bottom plate 17, and the positioning seat 12 is placed on the installation bottom plate 17, and the positioning rod 9 is placed on the installation bottom plate 17.

[0023] The working principle of this structure is as follows: When the packaging film needs to be inserted between the two film-pulling rollers 2, the drive cylinder 5 works, driving the swing arm 6 to move forward or backward at an angle. At this time, since the upper end of the swing bracket 4 is hinged to the frame 1, and the lower end of the swing bracket 4 is provided with an arc-shaped sliding groove 8, a positioning rod 9 is inserted into the arc-shaped sliding groove 8. Therefore, the swing bracket 4 is driven to move left and right with the upper end of the swing bracket 4 as the rotation center point. As the swing bracket 4 moves left and right, it eventually drives one of the front film-pulling rollers 2 to move left and right, thereby realizing the adjustment operation of the distance between it and the other film-pulling roller 2. When the two film-pulling rollers When the gap between the two film-pulling rollers 2 increases, the quick-release packaging film can be inserted between them. After inserting the film, the cylinder 5 is reset, which reduces the gap between the two film-pulling rollers 2 and clamps the packaging film. Then, the drive motor 10 is driven to rotate the main drive gear 11, which in turn drives the auxiliary drive gear 13 to rotate. The auxiliary drive gear 13 then drives the auxiliary drive gear 14 to rotate, ultimately causing the two front film-pulling rollers 2 to rotate synchronously and convey the clamped packaging film downwards. Therefore, this structure can automatically adjust the gap between the two film-pulling rollers 2, making it convenient for users to operate. Compared to manually adjusting one of the film-pulling rollers 2, this structure is faster and more efficient.

[0024] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A film stretching mechanism for a screw sealing machine, comprising a frame (1), wherein a film stretching wheel assembly is provided on the side of the frame (1), the film stretching wheel assembly comprising two film stretching wheels (2) and a drive mechanism for driving the two film stretching wheels (2) to rotate, characterized in that: A film pulling shaft (3) is provided at the center of each film pulling wheel (2). One of the film pulling shafts (3) is connected to the driving mechanism after being inserted into the machine frame (1), and the other film pulling shaft (3) is rotatably connected to a swing bracket (4) after being inserted into the machine frame (1). A cylinder (5) is provided in the machine frame (1). A swing rod (6) is connected to the piston rod of the cylinder (5). The other end of the swing rod (6) is connected to a swing arm (7). The other end of the swing arm (7) is connected to the side of the swing bracket (4). The upper end of the swing bracket (4) is hinged to the machine frame (1). An arc-shaped sliding groove (8) is provided at the lower end of the swing bracket (4). A positioning rod (9) is inserted into the arc-shaped sliding groove (8), and the other end of the positioning rod (9) is placed on the machine frame (1).

2. The packaging film stretching mechanism for a screw sealing machine according to claim 1, characterized in that: The driving mechanism includes a driving motor (10) and a main transmission gear (11). The output shaft of the driving motor (10) is connected to the main transmission gear (11). A positioning seat (12) is provided on one of the film pulling shafts (3) connected to the driving mechanism. A first auxiliary transmission gear (13) is provided at the end of the positioning seat (12) away from the film pulling wheel (2). One side of the first auxiliary transmission gear (13) meshes with the main transmission gear (11). A second auxiliary transmission gear (14) is provided at the end of the swing bracket (4) away from the film pulling wheel (2). The other side of the first auxiliary transmission gear (13) meshes with the second auxiliary transmission gear (14).

3. The packaging film stretching mechanism for a screw sealing machine according to claim 2, characterized in that: The driving motor (10) is fixed on a cross plate (15). A longitudinal plate (16) is connected to the side of the cross plate (15) away from the driving motor (10). An installation bottom plate (17) is connected to the side of the longitudinal plate (16) away from the cross plate (15). The installation bottom plate (17) is fixed on the machine frame (1).

4. The packaging film stretching mechanism for a screw sealing machine according to claim 3, characterized in that: The film pulling shafts (3) all penetrate through the installation bottom plate (17), and the positioning seat (12) is placed on the installation bottom plate (17). The positioning rod (9) is placed on the installation bottom plate (17).

5. A film-pulling mechanism for a screw sealing machine according to claim 1, 2, or 3, characterized in that: The top of the cylinder (5) is connected to a "C"-shaped cylinder seat (18). The "C"-shaped cylinder seat (18) is fixed on the machine frame (1) through a connecting plate (19).

6. A film-pulling mechanism for a screw sealing machine according to claim 1, 2, or 3, characterized in that: The swing arm (7) includes an L-shaped support (701) and a hinge seat (702). The hinge seat (702) is provided at one end of the L-shaped support (701). The hinge seat (702) is hinged to the swing rod (6). The other end of the L-shaped support (701) is connected to the side of the swing bracket (4).

Images