Furniture supporting frame film wrapping device

Abstract

A furniture supporting frame film wrapping device comprises a conveying table, an upper feeding roller and a lower feeding roller are arranged on the conveying table, tensioning rollers are vertically arranged on the conveying table at intervals, the two ends of each tensioning roller are slidably connected with tensioning wheels through springs, and eccentric pressing wheels are vertically arranged on the two sides of the conveying table at intervals. An outer extrusion wheel is rotationally arranged on the circumferential side wall of the eccentric pressing wheel, and a discharging plate is obliquely arranged on the conveying table. The tensioning wheels at the two ends of the tensioning roller can apply supporting force to the plastic film in the width direction, so that the plastic film is kept tensioned in the width direction, and the attractiveness of packaging and the utilization rate of materials are improved; and the eccentric pressing wheel can rotate to different angles to change the pre-pressing height of the plastic film on the outer extrusion wheel, so that the consistency of the tension degree of the film on the upper wall and the lower wall of the supporting frame is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of film coating, and in particular relates to a film coating device for a furniture support frame. Background Art

[0002] In the packaging process of furniture support frames, the commonly used packaging method is to cover the upper and lower sides of the support frame with a layer of plastic film respectively, and then use a sealing machine to heat-seal the end and both sides of the film, so that the support frame is finally completely wrapped in the plastic film.

[0003] Controlling the tension of the plastic film is crucial during this packaging process. Proper tension not only significantly improves the smoothness and aesthetics of the packaging, but also effectively increases raw material utilization and avoids material waste caused by film sagging. However, existing film wrapping processes have significant limitations: the film maintains tension only in the conveying direction (i.e., the length direction). The lack of an effective tensioning mechanism across the width prevents the film from evenly laminating to the support surface, severely impacting overall packaging quality.

[0004] Furthermore, during the pre-processing phase before sealing welding, the plastic films on both sides of the support frame must be pre-pressed and bonded together using an extrusion roller. However, due to the varying thicknesses of different support frame models and the fixed, non-adjustable height of the extrusion roller, the lamination positions of the upper and lower film layers are often asymmetrical. This asymmetry results in different margins at the lamination point between the upper and lower film layers, leading to an imbalance in film tension between the upper and lower walls of the support frame, which can cause misalignment and wrinkles during the final sealing weld. Summary of the Invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a furniture support frame coating device, which at least partially solves the above problems.

[0006] The technical solution adopted by the present invention is as follows: the present invention proposes a film coating device for a furniture support frame, comprising a conveying platform, on which an upper feeding roller and a lower feeding roller are provided, respectively used for coating the upper and lower walls of the support frame; Tension rollers are arranged on the conveying platform at intervals, and both ends of the tension rollers are slidably connected to tension wheels through springs; Eccentric pressure wheels are arranged on both sides of the conveying platform and can be fixed at different angles. There are two eccentric pressure wheels spaced apart on each side of the conveying platform. An outer extrusion wheel is rotatably provided on the circumferential side wall of the eccentric pressure wheel. The unloading plate is placed obliquely on the conveying platform, and the unloading plate is arranged between the upper and lower tensioning rollers, and the end of the unloading plate is located in the area between the eccentric pressure wheel and the tensioning roller.

[0007] In some embodiments, a rotating core hole is provided on the eccentric pressure wheel, and the rotating core hole is arranged offset from the center of the eccentric pressure wheel, and the center distance of the eccentric pressure wheel relative to the rotating core hole gradually changes.

[0008] In some embodiments, the outer circumferential array of the rotating core hole is provided with fixing holes, and the conveying platform is provided with fixing bolts, and the fixing bolts can be installed in cooperation with the fixing holes.

[0009] In some embodiments, a first bracket is provided on one side of the conveying platform, and the upper feeding roller and the lower feeding roller are arranged vertically and rotatably on the first bracket.

[0010] In some embodiments, a motor is provided on the side wall of the conveying platform, and the motor is connected to the upper feeding roller and the lower feeding roller through a pulley set.

[0011] In some embodiments, a second bracket is provided on the conveying platform, the second bracket is tilted relative to the first bracket, and a first inclined roller and a second inclined roller arranged vertically are rotatably provided on the second bracket.

[0012] In some embodiments, a third bracket is provided at the rear end of the second bracket, the third bracket and the second bracket are arranged obliquely, and the tensioning roller is rotatably arranged on the third bracket through a central axis, and the central axis passes through the center of the tensioning roller.

[0013] In some embodiments, the unloading plate is tilted between the first oblique roller and the second oblique roller.

[0014] In some embodiments, a conveyor belt is provided at the rear section of the conveyor platform, and a sealing machine is provided above the end of the conveyor belt.

[0015] In some embodiments, the end of the discharge plate is arranged on the conveyor belt, and the end of the discharge plate is arranged parallel to and close to the conveyor belt.

[0016] The beneficial effects achieved by the present invention are as follows: the tensioning wheels at both ends of the tensioning roller can exert a supporting force on the plastic film in the width direction, so that the plastic film remains tensioned in the width direction, the tension during wrapping in the width direction is improved, and defects such as dislocation and wrinkles are reduced; and the eccentric pressure wheel can be rotated to different angles to change the pre-pressing height of the plastic film on the outer extrusion wheel, thereby ensuring the consistency of the tension of the film on the upper and lower walls of the support frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a film coating device for a furniture support frame according to an embodiment of the present invention; Figure 2 This is a structural diagram of the furniture support frame coating device after removing the discharge plate according to an embodiment of the present invention; Figure 3 for Figure 1 sectional view of Figure 4 Schematic diagram of the structure of the tensioning roller; Figure 5 Schematic diagram of the structure of the eccentric pressure wheel; Figure 6 This is a comparison diagram of the upper and lower eccentric pressure wheels at different matching angles.

[0018] Among them, 1. Conveyor platform, 2. First bracket, 3. Second bracket, 4. Unloading plate, 5. Upper feed roller, 6. Lower feed roller, 7. First inclined roller, 8. Second inclined roller, 9. Third bracket, 10. Tensioning roller, 11. Motor, 12. Pulley set, 13. Eccentric pressure wheel, 14. Sealing machine, 15. Fixing bolt, 16. Conveyor belt, 17. Center shaft, 18. Tensioning wheel, 19. Spring, 20. Rotating core hole, 21. Fixing hole, 22. Outer extrusion wheel.

[0019] Among them, Figure 6 A represents the center height of the rotating core hole of the upper eccentric pressure wheel, B represents the center height of the rotating core hole of the lower eccentric pressure wheel, and H1 and H2 represent the contact heights of the upper and lower eccentric pressure wheels at different matching angles.

[0020] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention but do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0023] like Figure 1 and Figure 2As shown, an embodiment of the present invention proposes a film wrapping device for a furniture support frame, comprising a conveyor platform 1, a tensioning roller 10, an eccentric pressure wheel 13 and a discharge plate 4. An upper feeding roller 5 and a lower feeding roller 6 are provided on the conveyor platform 1. Plastic film rolls are wound around the upper feeding roller 5 and the lower feeding roller 6. The plastic film rolls are pulled back and covered on the upper and lower walls of the support frame to complete the film wrapping operation.

[0024] like Figure 3 and Figure 4 As shown, the tensioning rollers 10 are arranged at intervals in the upper and lower parts on the conveying platform 1. The upper tensioning roller 10 is in contact with the plastic film pulled out from the upper feeding roller 5, and the lower tensioning roller 10 is in contact with the plastic film pulled out from the lower feeding roller 6. The tensioning roller 10 cooperates with the upper feeding roller 5 and the lower feeding roller 6 to tension the plastic film in the length direction. The two ends of the tensioning roller 10 are slidably connected to the tensioning wheel 18 through the spring 19. The tensioning wheel 18 always slides toward the two ends of the tensioning roller 10 under the action of the spring 19, and drives the plastic film to be tensioned toward both ends in the width direction, so that the plastic film remains in a tensioned state in both the length and width directions, so as to improve the aesthetics and material utilization rate of subsequent packaging.

[0025] The eccentric pressure wheels 13 are arranged on both sides of the conveying platform 1 and can be fixed to different angles, and two eccentric pressure wheels 13 are arranged at intervals on each side of the conveying platform 1. Figure 5 and Figure 6 As shown, the center height of the rotation axis of the upper eccentric pressure wheel 13 is A, and the center height of the rotation axis of the lower eccentric pressure wheel 13 is B. When the upper and lower eccentric pressure wheels 13 are rotated to different angles, the distance from any point on the circumference of the eccentric pressure wheel 13 to the upper wall of the conveying platform 1 is different. When the upper and lower eccentric pressure wheels 13 are rotated to different angles and fixed, and the adjacent sides of the upper and lower eccentric pressure wheels 13 are ensured to be close to each other, the height of the close area relative to the conveying platform 1 also changes with the different fixed angles, thereby forming different fitting heights H1 and H2. An outer extrusion wheel 22 is rotatably provided on the circumferential side wall of the eccentric pressure wheel 13. The upper and lower outer extrusion wheels 22 are used for pre-extrusion of the plastic film, so that the plastic film pulled out by the upper feeding roller 5 and the lower feeding roller 6 is pre-pressed and bonded, thereby sealing the plastic film on both sides of the support frame; the height of the outer extrusion wheel 22 also changes with the angle change of the eccentric pressing wheel 13, and the extrusion position of the outer extrusion wheel 22 is always on the center line of the thickness of the support frame, that is, it is only necessary to ensure that H1 or H2 coincides with the symmetry plane in the thickness direction of the support frame to ensure that the bonding position of the upper and lower layers of film on the side is symmetrical, so that the margins at the bonding position of the upper and lower layers of film are the same, thereby ensuring the balance of the tension of the film on the upper and lower walls of the support frame.

[0026] like Figure 3As shown, the discharge plate 4 is placed obliquely on the conveyor table 1, and the discharge plate 4 is arranged between the upper and lower tensioning rollers 10. The end of the discharge plate 4 is in the area between the eccentric pressure wheel 13 and the tensioning roller 10. The support frame is put in from the high end of the discharge plate 4 and slides downward along the discharge plate 4 under the action of gravity. During the sliding process, it will pass through the film pulled out by the upper feed roller 5 and the lower feed roller 6 respectively, and at the same time pass through the gap between the tensioning rollers 10, so that the plastic film fits the upper and lower walls of the support frame.

[0027] In some embodiments, as Figure 5 As shown, the eccentric pressure wheel 13 is provided with a rotating core hole 20, and the rotating core hole 20 is set away from the center of the eccentric pressure wheel 13. The center distance of the eccentric pressure wheel 13 relative to the rotating core hole 20 gradually changes. When the eccentric pressure wheel 13 rotates to different angles around the rotating core hole 20, the height of the eccentric pressure wheel 13 relative to the conveying platform 1 will also change. In order to keep the eccentric pressure wheel 13 at the required angle, in some embodiments, the outer circumferential array of the rotating core hole 20 is provided with a fixing hole 21, and the conveying platform 1 is provided with a fixing bolt 15, which can be installed in conjunction with the fixing hole 21. The fixing bolt 15 is pulled out from the conveying platform 1, and then passed through the fixing hole 21 to be tightened on the conveying platform 1.

[0028] In some embodiments, as Figure 1 and Figure 2 As shown, a first bracket 2 is provided on one side of the conveying platform 1, and an upper feed roller 5 and a lower feed roller 6 are arranged and rotated up and down on the first bracket 2. A motor 11 is provided on the side wall of the conveying platform 1, and the motor 11 is connected to the upper feed roller 5 and the lower feed roller 6 through a pulley set 12, thereby driving the upper feed roller 5 and the lower feed roller 6 to rotate, thereby continuously conveying the plastic film.

[0029] In some embodiments, a second bracket 3 is provided on the conveying platform 1, and the second bracket 3 is tilted to the first bracket 2. A first oblique roller 7 and a second oblique roller 8 are rotatably arranged up and down on the second bracket 3, and the discharge plate 4 is tilted between the first oblique roller 7 and the second oblique roller 8. A third bracket 9 is provided at the rear end of the second bracket 3, and the third bracket 9 and the second bracket 3 are tilted. The tensioning roller 10 is rotatably arranged on the third bracket 9 through the central axis 17, and the central axis 17 passes through the center of the tensioning roller 10. The plastic film passes between the first bracket 2, the second bracket 3 and the third bracket 9, and is thereby bent into a certain angle. This film traction method can avoid the support frame to prevent the support frame from interfering with the plastic film during the loading operation, thereby causing damage to the plastic film.

[0030] In some embodiments, a conveyor belt 16 is provided at the rear section of the conveyor platform 1, a sealing machine 14 is provided above the end of the conveyor belt 16, and the end of the discharge plate 4 is provided on the conveyor belt 16. Figure 3As shown, the end of the discharge plate 4 is arranged parallel to and close to the conveyor belt 16. In the process of the support frame sliding down from the discharge plate 4, the plastic film on the upper and lower walls of the support frame has been covered. After the support frame falls, it will be directly on the conveyor belt 16. The conveyor belt 16 continues to provide traction to move the support frame forward. In the process of movement, the outer extrusion wheel 22 on the eccentric pressure wheel 13 will pre-extrude the edges of the plastic film on the upper and lower walls to make them fit together, and then move to the sealing machine 14 to weld and seal the plastic film. After sealing is completed, it will be cut to complete the film operation of each support frame.

[0031] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0032] The present invention and its embodiments are described above. Such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. A furniture support frame coating device, comprising a conveying platform (1), characterized in that: Also includes: An upper feeding roller (5) and a lower feeding roller (6) are provided on the conveying platform (1) and are used for coating the upper and lower walls of the support frame respectively; Tension rollers (10) are arranged on the conveying platform (1) at intervals in an upper and lower arrangement, and both ends of the tension rollers (10) are slidably connected to tension wheels (18) via springs (19); Eccentric pressure wheels (13) are provided on both sides of the conveying platform (1) and can be adjusted to different angles, and two are arranged at intervals on each side of the conveying platform (1), and an outer extrusion wheel (22) is rotatably provided on the circumferential side wall of the eccentric pressure wheel (13); The discharge plate (4) is obliquely arranged between the upper and lower tensioning rollers (10), and the end of the discharge plate (4) is located in the area between the eccentric pressure wheel (13) and the tensioning roller (10).

2. The furniture support frame coating device according to claim 1, characterized in that: The eccentric pressure wheel (13) is provided with a rotating core hole (20), and the rotating core hole (20) is arranged offset from the center of the eccentric pressure wheel (13), and the center distance of the eccentric pressure wheel (13) relative to the rotating core hole (20) gradually changes.

3. The furniture support frame coating device according to claim 2, characterized in that: The outer circumferential array of the rotating core hole (20) is provided with fixing holes (21), and the conveying platform (1) is provided with fixing bolts (15), and the fixing bolts (15) can be installed in cooperation with the fixing holes (21).

4. The furniture support frame coating device according to claim 1, characterized in that: A first bracket (2) is provided on one side of the conveying platform (1), and the upper feeding roller (5) and the lower feeding roller (6) are arranged vertically and rotatably on the first bracket (2).

5. The furniture support frame coating device according to claim 4, characterized in that: A motor (11) is provided on the side wall of the conveying platform (1), and the motor (11) is connected to an upper feeding roller (5) and a lower feeding roller (6) via a pulley group (12).

6. The furniture support frame coating device according to claim 5, characterized in that: The conveying platform (1) is provided with a second bracket (3), the second bracket (3) and the first bracket (2) are arranged at an angle, and the second bracket (3) is rotatably provided with a first inclined roller (7) and a second inclined roller (8) arranged up and down.

7. The furniture support frame coating device according to claim 6, characterized in that: A third bracket (9) is provided at the rear end of the second bracket (3), the third bracket (9) and the second bracket (3) are arranged at an angle, and the tensioning roller (10) is rotatably arranged on the third bracket (9) via a central axis (17), and the central axis (17) passes through the center of the tensioning roller (10).

8. The furniture support frame coating device according to claim 7, characterized in that: The unloading plate (4) is arranged obliquely between the first oblique roller (7) and the second oblique roller (8).

9. The furniture support frame coating device according to claim 1, characterized in that: A conveyor belt (16) is provided at the rear section of the conveyor platform (1), and a sealing machine (14) is provided above the end of the conveyor belt (16).

10. The furniture support frame coating device according to claim 9, characterized in that: The end of the discharge plate (4) is arranged on the conveyor belt (16), and the end of the discharge plate (4) is arranged parallel to and close to the conveyor belt (16).

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