Uniform tension unwinding device of adhesive label printing machine

Abstract

The utility model relates to the technical field of unwinding devices, in particular to a tension-uniform unwinding device of a self-adhesive label printing machine. According to the technical scheme, the device comprises a bottom table, two symmetrically-arranged fixing plates are fixedly installed at the top of the bottom table, the opposite sides of the two fixing plates are rotationally connected with an unwinding roller and a driving roller, and adhesive labels make contact with the unwinding roller and the driving roller; and the pressing roller assembly comprises a pressure roller, a stretching assembly and receding assemblies, the two ends of the pressure roller are rotationally connected with the buffering assemblies correspondingly, and the receding assemblies are arranged at the two ends of the buffering assemblies correspondingly. The pressure roller bears upward force applied by the self-adhesive label, so that the bent plate and the stretching assembly move upwards, the force borne by the pressure roller is reduced through abdication, the pressure roller moves upwards by a certain distance every time the force borne by the pressure roller is too large, and the problem that the force between the self-adhesive label and the pressure roller is too large, and the self-adhesive label is broken is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of unwinding devices, in particular to an unwinding device with uniform tension for a self-adhesive label printing machine. Background Art

[0002] Self-adhesive labels are a type of label paper with a self-adhesive layer evenly coated on the back, usually adhered to an easily peelable waxed paper on the self-adhesive layer. Self-adhesive labels are printed, rolled and die-cut by a self-adhesive label machine, the blank excess parts are peeled off, the pattern and text are set, and the self-adhesive labels are unwound through an unwinding device.

[0003] In the prior art, the unwinding device unwinds the self-adhesive label by rotating, so that the self-adhesive label moves and is printed, rolled and die-cut, and the self-adhesive label is guided by a guide roller.

[0004] With this unwinding device, as the unwinding proceeds, the amount of the self-adhesive label on the unwinding device becomes less and less, and the tension of the self-adhesive label by the unwinding device and the guide roller gradually changes, and the self-adhesive label will not be stretched straight, resulting in wrinkles during printing. Utility Model Content

[0005] The utility model aims to provide a tension-uniform unwinding device for a self-adhesive label printing machine in view of the problem in the background technology that the self-adhesive label becomes loose due to the change in the pulling force received by the label.

[0006] The technical solution of the utility model is: a tension uniform unwinding device of a self-adhesive label printing machine, comprising a base, two symmetrically arranged fixed plates are fixedly installed on the top of the base, and an unwinding roller and a driving roller are rotatably connected on the opposite sides of the two fixed plates, and the unwinding roller and the driving roller are in contact with the self-adhesive label;

[0007] A pressure roller assembly, comprising a pressure roller, a tensioning assembly and a yielding assembly, both ends of the pressure roller are rotatably connected to the buffer assembly, both ends of the buffer assembly are provided with yielding assemblies, and the pressure roller presses down the self-adhesive label;

[0008] The give-way assembly includes a setting block, a giving-way block, a spring telescopic rod and a curved plate. The curved plate is fixedly installed on a side of the base away from the fixed plate. The spring telescopic rod is fixedly installed on the side of the curved plate. The end of the spring telescopic rod is fixedly installed on the giving-way block, and the giving-way block is clamped with the setting block.

[0009] Optionally, the erection block is fixedly mounted on both sides of the tensioning and pressing assembly, and both the erection block and the clearance block adopt a wedge-shaped structure, and the inclined surface of the erection block and the inclined surface of the clearance block are in contact with each other.

[0010] Optionally, there are multiple give-way blocks, which are divided into multiple groups with two as a group, and the multiple groups of give-way blocks are equidistantly distributed along a vertical line, and two adjacent groups of erection blocks clamp the erection blocks.

[0011] Optionally, the tensioning assembly includes a docking block, a damping telescopic rod and a lifting block, the damping telescopic rod is fixedly mounted on the top of the docking block, and the top of the damping telescopic rod is fixedly connected to the lifting block.

[0012] Optionally, the side of the docking block is slidably connected to the fixed plate, a circular hole for rotating the pressure roller is opened on the docking block, and the curved plate is fixedly installed on both sides of the lifting block.

[0013] Optionally, a slide groove is provided on the base platform, and the pressure roller passes through the base platform from the slide groove, and the pressure roller slides in the slide groove.

[0014] Optionally, the unwinding roller and the driving roller are parallel to each other, the self-adhesive label forms an S shape around the unwinding roller, the driving roller and the pressure roller, and a cutter is fixedly installed between the two fixed plates.

[0015] Compared with the prior art, the utility model has the following beneficial technical effects:

[0016] The utility model uses the upward force exerted by the self-adhesive label on the pressure roller to move the curved plate and the pressing assembly upward, and reduces the force exerted on the pressure roller by giving way. Whenever the pressure roller is subjected to excessive force, it moves upward for a certain distance, thereby avoiding the problem of excessive force between the self-adhesive label and the pressure roller, which may cause the self-adhesive label to break.

[0017] Furthermore, the pressure roller is subjected to excessive force, causing the mounting block to move upward to between the two groups of mounting blocks located above. The position of the pressure roller is fixed by the two groups of mounting blocks, so that the pressure of the pressure roller on the self-adhesive label is stabilized, thereby preventing the pressure roller from vibrating up and down when transmitting the self-adhesive label and separating from the self-adhesive label, causing the self-adhesive label to deform under the impact of gravitational potential energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the overall structure of an embodiment of the utility model is given;

[0019] Figure 2 A schematic diagram of the structure of a yielding component in one embodiment of the utility model is given;

[0020] Figure 3 A schematic cross-sectional view of the unwinding roller structure of an embodiment of the utility model is given;

[0021] Figure 4 A schematic front and cross-sectional view of a base structure of an embodiment of the utility model is given.

[0022] Figure numerals: 1. base; 2. fixed plate; 3. unwinding roller; 4. driving roller; 5. pressure roller assembly; 51. pressure roller; 52. docking block; 53. damping telescopic rod; 54. lifting block; 55. slide; 56. give way assembly; 561. erection block; 562. give way block; 563. spring telescopic rod; 564. curved plate; 6. cutter. DETAILED DESCRIPTION

[0023] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0024] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0025] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example 1

[0029] This embodiment provides a tension uniform unwinding device for a self-adhesive label printing machine, such as Figure 1As shown, it includes a base 1, and two symmetrically arranged fixed plates 2 are fixedly installed on the top of the base 1. The two fixed plates 2 are rotatably connected to the opposite sides with a reel 3 and a driving roller 4. The reel 3 and the driving roller 4 are in contact with self-adhesive labels. The self-adhesive labels are reeled by the reel 3, and the end of the driving roller 4 is fixedly connected to the motor through a rotating shaft. The driving roller 4 serves as a driving shaft to reel the self-adhesive labels. A cutter 6 is fixedly installed between the two fixed plates 2 for cutting the self-adhesive labels.

[0030] like Figure 2 As shown, the unwinding device also includes a pressure roller assembly 5, which includes a pressure roller 51, a stretching and pressing assembly and a yielding assembly 56. Both ends of the pressure roller 51 are rotatably connected to the buffer assembly. Both ends of the buffer assembly are provided with a yielding assembly 56. The pressure roller 51 presses down the self-adhesive label; the stretching and pressing assembly presses down the self-adhesive label to put it in a stretched and straight state, avoiding wrinkles during printing, rolling and die-cutting, resulting in unclear text or patterns on the label.

[0031] like Figure 4 As shown, the unwinding roller 3 and the driving roller 4 are parallel to each other, and the self-adhesive label forms an S shape around the unwinding roller 3, the driving roller 4 and the pressure roller 51, and the pulling force on the self-adhesive label is increased by the direction of the S shape.

[0032] like Figure 2 As shown, the clearance assembly 56 includes a mounting block 561, a clearance block 562, a spring telescopic rod 563 and a curved plate 564. The curved plate 564 is fixedly mounted on the side of the base 1 away from the fixed plate 2. The spring telescopic rod 563 is fixedly mounted on the side of the curved plate 564. The end of the spring telescopic rod 563 is fixedly mounted on the clearance block 562. The clearance block 562 is clamped with the mounting block 561. By clamping the mounting block 561 with the clearance block 562, the position of the tensioning assembly can be fixed.

[0033] The erection block 561 is fixedly installed on both sides of the tension and compression assembly, and both the erection block 561 and the clearance block 562 adopt a wedge-shaped structure, and the inclined surface of the erection block 561 contacts the inclined surface of the clearance block 562. The clearance block 562 compresses the spring telescopic rod 563 to make way through the inclined surface extrusion.

[0034] like Figure 2 As shown, there are multiple giving way blocks 562, two in a group, which are divided into multiple groups, and the multiple groups of giving way blocks 562 are evenly distributed along the vertical line, and two adjacent groups of erection blocks 561 clamp the erection blocks 561. When the pressure roller 51 is subjected to excessive force, the curved plate 564 moves upward and enters between the two upper groups of erection blocks 561, giving way to reduce the force on the pressure roller 51.

[0035] As the unwinding roller 3 releases the self-adhesive label, the angle between the self-adhesive label and the pressure roller 51 becomes larger and larger, the force applied by the pressure roller 51 to the self-adhesive label becomes larger and larger, and the relative force applied by the self-adhesive label to the pressure roller 51 also becomes larger. At this time, the pressure roller 51 pushes the stretching and pressing assembly upward, and the setting blocks 561 on both sides of the stretching and pressing assembly squeeze the yielding blocks 562 and move upward. The setting blocks 561 are stuck in a fixed position between the two groups of yielding blocks 562 located above. When the pressure roller 51 is subjected to too much force, it yields upward to reduce the force.

[0036] Directly pressing down by the pressure roller 51 without a fixed position will result in poor stability, and the pressure roller 51 will vibrate up and down when transmitting the self-adhesive label.

[0037] The position of the tensioning assembly can be freely adjusted by pushing the clearance block 562 away from the erection block 561 .

[0038] In this embodiment, the pressure roller 51 is subjected to an upward force from the self-adhesive label, causing the curved plate 564 and the pressing assembly to move upward to between the two sets of mounting blocks 561 above. By giving way, the force on the pressure roller 51 is reduced. Whenever the pressure roller 51 is subjected to excessive force, it moves upward for a certain distance, thereby preventing the self-adhesive label from breaking due to excessive force between the self-adhesive label and the pressure roller 51.

[0039] Example 2

[0040] Based on Example 1, this example proposes a tension uniform unwinding device for a self-adhesive label printing machine, such as Figure 2 As shown, the tensioning assembly includes a docking block 52 , a damping telescopic rod 53 and a lifting block 54 . The damping telescopic rod 53 is fixedly mounted on the top of the docking block 52 , and the top of the damping telescopic rod 53 is fixedly connected to the lifting block 54 .

[0041] The elastic force of the damping telescopic rod 53 and the gravity of the pressure roller 51 exert downward force on the self-adhesive label, and the length of the damping telescopic rod 53 is the movable range of the pressure roller 51. When the damping telescopic rod 53 is compressed to the limit value, the self-adhesive label directly pushes up the lifting block 54. There is damping in the damping telescopic rod 53 to prevent the damping telescopic rod 53 from being quickly contracted or extended.

[0042] The side of the docking block 52 is slidably connected to the fixed plate 2 . A circular hole for rotating the pressure roller 51 is provided on the docking block 52 . The curved plates 564 are fixedly mounted on both sides of the lifting block 54 .

[0043] like Figure 3 As shown, a slide groove 55 is provided on the base 1, and the pressure roller 51 passes through the base 1 from the slide groove 55, and the pressure roller 51 slides in the slide groove 55. The pressure roller 51 cooperates with the damping telescopic rod 53, and moves upward to change the pressure when the pressure roller 51 is subjected to force.

[0044] In this embodiment, the pressure roller 51 is used to press down and tighten the self-adhesive label, and the self-weight of the pressure roller 51 and the docking block 52 applies a tightening pressure to the self-adhesive label. The damping formed by the mutual squeezing between the mounting block 561 and the yielding block 562 can prevent the pressure roller 51 from moving up and down quickly when transmitting the self-adhesive label, thereby preventing the pressure roller 51 from separating from the self-adhesive label and causing the self-adhesive label to deform under the impact of gravitational potential energy.

[0045] The above-mentioned specific embodiments are only several optional embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A tension uniform unwinding device for a self-adhesive label printing machine, characterized in that: include: A base (1), wherein two symmetrically arranged fixing plates (2) are fixedly mounted on the top of the base (1), and a reeling roller (3) and a driving roller (4) are rotatably connected on opposite sides of the two fixing plates (2), and the reeling roller (3) and the driving roller (4) are in contact with self-adhesive labels; A pressure roller assembly (5), comprising a pressure roller (51), a tensioning assembly and a clearance assembly (56), wherein both ends of the pressure roller (51) are rotatably connected to the buffer assembly, and both ends of the buffer assembly are provided with the clearance assembly (56), and the pressure roller (51) presses down the self-adhesive label; The giving way component (56) comprises a setting block (561), a giving way block (562), a spring telescopic rod (563) and a curved plate (564); the curved plate (564) is fixedly mounted on a side of the base (1) away from the fixed plate (2); the spring telescopic rod (563) is fixedly mounted on the side of the curved plate (564); the giving way block (562) is fixedly mounted on the end of the spring telescopic rod (563); and the giving way block (562) is snap-connected with the setting block (561).

2. The tension uniform unwinding device of a self-adhesive label printing machine according to claim 1, characterized in that: The erection block (561) is fixedly mounted on both sides of the tensioning and pressing assembly. The erection block (561) and the clearance block (562) both adopt a wedge-shaped structure. The inclined surface of the erection block (561) and the inclined surface of the clearance block (562) are in contact with each other.

3. The tension uniform unwinding device of a self-adhesive label printing machine according to claim 1, characterized in that: The said making way blocks (562) are provided in plurality, and are divided into a plurality of groups with two as one group. The plurality of groups of the making way blocks (562) are distributed equidistantly along a vertical line, and two adjacent groups of erection blocks (561) clamp the erection blocks (561).

4. The tension uniform unwinding device of a self-adhesive label printing machine according to claim 1, characterized in that: The tensioning assembly comprises a docking block (52), a damping telescopic rod (53) and a lifting block (54); the damping telescopic rod (53) is fixedly mounted on the top of the docking block (52); and the top of the damping telescopic rod (53) is fixedly connected to the lifting block (54).

5. The tension uniform unwinding device of a self-adhesive label printing machine according to claim 4, characterized in that: The side of the docking block (52) is slidably connected to the fixed plate 2(), and a circular hole for rotating the pressure roller (51) is opened on the docking block (52). The curved plate (564) is fixedly installed on both sides of the lifting block (54).

6. The tension uniform unwinding device of a self-adhesive label printing machine according to claim 5, characterized in that: The base (1) is provided with a slide groove (55), the pressure roller (51) passes through the base (1) from the slide groove (55), and the pressure roller (51) slides in the slide groove (55).

7. The tension uniform unwinding device of a self-adhesive label printing machine according to claim 1, characterized in that: The unwinding roller (3) and the driving roller (4) are parallel to each other, the self-adhesive label forms an S shape around the unwinding roller (3), the driving roller (4) and the pressure roller (51), and a cutter (6) is fixedly installed between the two fixed plates (2).

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