Tensioning device for wrapping film

Abstract

The utility model belongs to the technical field of wrapping film production equipment, and particularly relates to a wrapping film tensioning device which comprises a supporting plate and a limiting plate arranged on the side face of the supporting plate. The supporting arm is arranged between the supporting plate and the limiting plate and is in sliding connection with the supporting plate and the limiting plate; the first guide roller is arranged on the upper side surface of the supporting arm; two ends of the tension spring are respectively connected with the supporting arm and the limiting plate; according to the tensioning device for the winding film, when the first guide roller is pressed by the winding film, the supporting arm is driven to slide downwards between the supporting plate and the limiting plate, so that the tension spring is stretched through the supporting arm; and the tension spring drives the supporting arm to slide upwards between the supporting plate and the limiting plate during semi-resetting, so that the first guide roller tensions the winding film, and the effect of automatically tensioning the winding film in real time is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of winding film production equipment, and particularly relates to a tensioning device for winding film. Background Art

[0002] Winding film, also known as stretch film and heat shrinkable film, was first made of PVC as the base material and DOA as the plasticizer and self-adhesive agent to produce PVC winding film in China. Due to environmental protection problems, high cost (relatively high specific gravity compared with PE, less unit packaging area), poor stretchability and other reasons, it was gradually phased out when PE stretch film began to be produced in China from 1994 to 1995. PE stretch film first used EVA as the self-adhesive material, but its cost was high and it had a smell. Later, PIB and VLDPE were developed as self-adhesive materials, and the base material was mainly LLDPE, including C4, C6, C8 and metallocene PE (MPE). In order to make the winding film have a certain tightness during processing and winding, a tensioning device is usually required to be set in the winding film unit for tensioning.

[0003] The tensioning device in the prior art needs to be adjusted manually when the winding film moves, which is prone to loosening, difficult to tension the winding film in real time, and has a poor tensioning effect, affecting subsequent processing.

[0004] Therefore, in order to solve the above problems, it is necessary to design a tensioning device for winding film. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a tensioning device for winding film to solve the technical problem of poor tensioning effect of the tensioning device.

[0006] To solve the above technical problems, the utility model provides a tensioning device for winding film, including:

[0007] A support plate and a limiting plate arranged on the side of the support plate;

[0008] A support arm arranged between the support plate and the limiting plate, and it is slidably connected with the support plate and the limiting plate;

[0009] A first guide roller arranged on the upper side of the support arm;

[0010] A tension spring, the two ends of which are respectively connected with the support arm and the limiting plate; wherein

[0011] The first guide roller is adapted to drive the support arm to slide downward between the support plate and the limiting plate when being pressed, so as to stretch the tension spring through the support arm; and

[0012] The tension spring is adapted to drive the support arm to slide upward between the support plate and the limiting plate when in semi-reset, so as to tension the winding film by the first guide roller.

[0013] Further, a first guiding portion is provided on the support plate;

[0014] A second guiding portion is provided on the limiting plate; wherein

[0015] The support arm is adapted to slide within the first guiding portion and the second guiding portion.

[0016] Further, a first fixing post is provided on the limiting plate;

[0017] A second fixing post is provided on the support arm; wherein

[0018] Both ends of the tension spring are respectively sleeved on the first fixing post and the second fixing post.

[0019] Further, a first limiting portion is formed at the upper part of the first fixing post;

[0020] A second limiting portion is formed at the lower part of the second fixing post;

[0021] Both ends of the tension spring are respectively located within the first limiting portion and the second limiting portion.

[0022] Further, a telescopic member is provided on the side surface of the support plate;

[0023] A connecting block is provided at the telescopic end of the telescopic member;

[0024] A special-shaped plate is provided on the side surface of the connecting block; wherein

[0025] A second guiding roller is provided on the upper side surface of the special-shaped plate; and

[0026] A third guiding roller is provided on the lower side surface of the special-shaped plate.

[0027] Further, an arc-shaped through-hole portion is formed on the special-shaped plate;

[0028] A bolt is engaged with the connecting block; wherein

[0029] The bolt is adapted to pass through the arc-shaped through-hole portion and then be engaged with the connecting block; and

[0030] The arc-shaped through-hole portion is adapted to move along the bolt.

[0031] Further, a motor is provided on the side surface of the support plate;

[0032] A paper tube fixing post is connected to the rotating end of the motor; wherein

[0033] The paper tube fixing post is adapted to wind the winding film; and

[0034] The winding film is adapted to be wound by the paper tube on the paper tube fixing post after passing above the second guiding roller, below the third guiding roller, and above the first guiding roller.

[0035] The beneficial effects of the present utility model are as follows:

[0036] (1). The present utility model guides the winding film through the first guiding roller. In the initial state, the first guiding roller is pressed down by the winding film, and the first guiding roller drives the supporting arm to slide downward in the first guiding part and the second guiding part. At this time, the second fixing column on the supporting arm and the first positioning column on the limiting plate stretch the tension spring. When the winding film is loose and the downward pressure is less than the elastic force of the tension spring, the tension spring rebounds and drives the supporting arm to slide upward in the first guiding part and the second guiding part, so as to continuously tension the winding film by the first guiding roller. Through the above steps, the effect of automatically tensioning the winding film in real time is achieved.

[0037] (2). The present utility model controls the telescopic member to expand and contract to adjust the distances between the second guiding roller and the third guiding roller on the special-shaped plate and the first guiding roller, so as to tension the winding film by the first guiding roller, the second guiding roller and the third guiding roller, thereby achieving the effect of remotely tensioning the winding film.

[0038] Other features and advantages of the present utility model will be described in the subsequent description, and some of them will be obvious from the description or understood by implementing the present utility model. The objectives and other advantages of the present utility model are realized and obtained by the structures specifically pointed out in the description and the drawings.

[0039] In order to make the above objectives, features and advantages of the present utility model more obvious and understandable, the following specific preferred embodiments are given and described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0041] Figure 1 is a perspective view of the preferred embodiment of the overall reverse side of the present utility model;

[0042] Figure 2 is an exploded view of the preferred embodiment of the present utility model;

[0043] Figure 3 is a perspective view of the preferred embodiment of the limiting plate of the present utility model;

[0044] Figure 4 is a perspective view of the preferred embodiment of the overall front side of the present utility model.

[0045] In the figure:

[0046] Support plate 1, first guiding portion 101, limiting plate 2, second guiding portion 201, support arm 3, first guiding roller 4, tension spring 5, first fixing column 6, first limiting portion 601, second fixing column 7, second limiting portion 701, telescopic member 8, connecting block 9, special-shaped plate 10, arc through-hole portion 1001, second guiding roller 11, third guiding roller 12, bolt 13, motor 14, paper tube fixing column 15. Detailed implementation manners

[0047] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model. Embodiment 1

[0048] As Figures 1 to 4 shown, this embodiment provides a tensioning device for winding film, including:

[0049] A support plate 1 and a limiting plate 2 arranged on the side of the support plate 1; a support arm 3 arranged between the support plate 1 and the limiting plate 2 and slidably connected to the support plate 1 and the limiting plate 2; a first guiding roller 4 arranged on the upper side of the support arm 3; a tension spring 5 with its two ends respectively connected to the support arm 3 and the limiting plate 2; wherein the first guiding roller 4 is adapted to drive the support arm 3 to slide downward between the support plate 1 and the limiting plate 2 when being pressed, so as to stretch the tension spring 5 through the support arm 3; and the tension spring 5 is adapted to drive the support arm 3 to slide upward between the support plate 1 and the limiting plate 2 when in semi-reset, so as to tension the winding film by the first guiding roller 4; wherein the support plate 1 and the limiting plate 2 are connected by bolts, but are not limited thereto.

[0050] The support plate 1 is provided with a first guiding portion 101; the limiting plate 2 is provided with a second guiding portion 201; wherein the support arm 3 is adapted to slide within the first guiding portion 101 and the second guiding portion 201; by providing the first guiding portion 101 and the second guiding portion 201, the effect of limiting the support arm 3 is achieved.

[0051] The limiting plate 2 is provided with a first fixing column 6; the support arm 3 is provided with a second fixing column 7; wherein the two ends of the tension spring 5 are respectively sleeved on the first fixing column 6 and the second fixing column 7.

[0052] The upper part of the first fixing post 6 is provided with a first limiting part 601; the lower part of the second fixing post 7 is provided with a second limiting part 701; both ends of the tension spring 5 are respectively located in the first limiting part 601 and the second limiting part 701; by providing the first limiting part 601 and the second limiting part 701, the effect of limiting the tension spring 5 is achieved, and the effect of preventing the tension spring 5 from sliding on the first fixing post 6 and the second fixing post 7 is achieved.

[0053] In this embodiment, the winding film is guided by the first guiding roller 4. In the initial state, the first guiding roller 4 is pressed down by the winding film, and the first guiding roller 4 drives the support arm 3 to slide downward in the first guiding part 101 and the second guiding part 201. At this time, the second fixing post 7 on the support arm 3 and the first positioning post 6 on the limiting plate 2 stretch the tension spring 5. When the winding film is slack and the downward pressure is less than the elastic force of the tension spring 5, the tension spring 5 rebounds and drives the support arm to slide upward in the first guiding part 101 and the second guiding part 201, so that the first guiding roller 4 continuously tensions the winding film. Through the above steps, the effect of automatically tensioning the winding film in real time is achieved. Embodiment 2

[0054] As Figure 1 、 Figure 4 shown, on the basis of Embodiment 1, this Embodiment 2 includes:

[0055] A telescopic member 8 is provided on the side surface of the support plate 1; a connecting block 9 is provided at the telescopic end of the telescopic member 8; a special-shaped plate 10 is provided on the side surface of the connecting block 9; wherein a second guiding roller 11 is provided on the upper side surface of the special-shaped plate 10; and a third guiding roller 12 is provided on the lower side surface of the special-shaped plate 10; wherein the telescopic member 8 may be but is not limited to a cylinder; by controlling the telescopic member 8 to expand and contract, the distances between the second guiding roller 11 and the third guiding roller 12 on the special-shaped plate 10 and the first guiding roller 4 are adjusted, so that the first guiding roller 4, the second guiding roller 11 and the third guiding roller 12 tension the winding film, thereby achieving the effect of remotely tensioning the winding film.

[0056] An arc-shaped through-hole part 1001 is provided on the special-shaped plate 10; a bolt 13 is engaged with the connecting block 9; wherein the bolt 13 is adapted to pass through the arc-shaped through-hole part 1001 and then be engaged with the connecting block 9; and the arc-shaped through-hole part 1001 is adapted to move along the bolt 13; by engaging the bolt 13 with the connecting block 9, the special-shaped plate 10 is fixed, and then by moving the arc-shaped through-hole part 1001 on the special-shaped plate 10 along the bolt 13, the angle of the special-shaped plate 10 is adjusted, thereby achieving the effect of adjusting the guiding positions of the second guiding roller 11 and the third guiding roller 12.

[0057] A motor 14 is provided on the side of the support plate 1; a paper tube fixing column 15 is connected to the rotating end of the motor 14; wherein the paper tube fixing column 15 is adapted to wind the winding film; and the winding film is adapted to be wound by the paper tube on the paper tube fixing column 15 after passing over the upper part of the second guide roller 11, under the lower part of the third guide roller 12 and over the upper part of the first guide roller 4.

[0058] Each device (components without specific structures) selected in this application is a general standard component or a component known to those skilled in the art, and its structure and principle can be known to those skilled in the art through technical manuals or obtained through conventional experimental methods.

[0059] In the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0060] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0061] Based on the above inspiration from the ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present utility model. The technical scope of the present utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A tensioning device for a stretch film, characterized in that: include: A support plate (1) and a limit plate (2) arranged on a side of the support plate (1); A support arm (3) is arranged between the support plate (1) and the limit plate (2), and is slidably connected to the support plate (1) and the limit plate (2); A first guide roller (4) is arranged on the upper side of the support arm (3); The tension spring (5) has two ends connected to the support arm (3) and the limit plate (2) respectively; wherein The first guide roller (4) is suitable for driving the support arm (3) to slide downward between the support plate (1) and the limit plate (2) when under pressure, so as to stretch the tension spring (5) through the support arm (3); and The tension spring (5) is suitable for driving the support arm (3) to slide upwards between the support plate (1) and the limit plate (2) during semi-reset, so that the first guide roller (4) tensions the wrapping film.

2. The stretch film tensioning device according to claim 1, characterized in that: The support plate (1) is provided with a first guide portion (101); The limiting plate (2) is provided with a second guide portion (201); wherein The support arm (3) is suitable for sliding in the first guide portion (101) and the second guide portion (201).

3. The stretch film tensioning device according to claim 2, characterized in that: The limiting plate (2) is provided with a first fixing column (6); The support arm (3) is provided with a second fixing column (7); wherein The two ends of the tension spring (5) are respectively sleeved on the first fixing column (6) and the second fixing column (7).

4. The stretch film tensioning device according to claim 3, characterized in that: A first limiting portion (601) is provided on the upper portion of the first fixing column (6); A second limiting portion (701) is provided at the lower portion of the second fixing column (7); The two ends of the tension spring (5) are respectively located in the first limiting portion (601) and the second limiting portion (701).

5. The tensioning device for a wrapping film according to claim 4, characterized in that: A telescopic member (8) is provided on the side of the support plate (1); The telescopic end of the telescopic member (8) is provided with a connecting block (9); A special-shaped plate (10) is provided on the side of the connection block (9); wherein A second guide roller (11) is provided on the upper side of the special-shaped plate (10); and A third guide roller (12) is provided on the lower side of the special-shaped plate (10).

6. The tensioning device for a wrapping film according to claim 5, characterized in that: The special-shaped plate (10) is provided with an arc-shaped through hole portion (1001); The connecting block (9) is engaged with a bolt (13); wherein The bolt (13) is adapted to pass through the arc-shaped through hole portion (1001) and then engage with the connecting block (9); and The arc-shaped through hole portion (1001) is suitable for moving along the bolt (13).

7. The stretch film tensioning device according to claim 6, characterized in that: A motor (14) is provided on the side of the support plate (1); The rotating end of the motor (14) is connected to a paper tube fixing column (15); wherein The paper roll fixing column (15) is suitable for rolling up the wrapping film; and The wrapping film is suitable for being wound up by the paper tube on the paper tube fixing column (15) after passing through the upper part of the second guide roller (11), the lower part of the third guide roller (12) and the upper part of the first guide roller (4).

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