labeling machine

Abstract

The present application discloses a labeling machine, comprising a unwinding roller, a labeling assembly, a traction roller, a rewinding roller and a rotary drive assembly, wherein the rotary drive assembly is used to drive the traction roller and the rewinding roller to rotate so that the paper tape passes through the labeling assembly, and the empty paper tape is recovered by the rewinding roller after the label paper is labeled; the labeling machine also includes an unwinding and tensioning assembly, the unwinding and tensioning assembly comprises a first swing roller, a first swing arm, a first rotating shaft, a cam, a second swing arm, a second rotating shaft, a fixed wheel and a fixed wheel belt, and the unwinding and tensioning assembly is linked to the first swing roller and the unwinding roller; the automatic unwinding labeling machine disclosed in the present application no longer relies on driving the unwinding roller to actively release the paper tape, but realizes the paper tape running and ensures the tension of the paper tape through the reciprocatingly linked unwinding and tensioning assembly. Such an arrangement greatly simplifies the unwinding control, can avoid the unstable paper tape tension caused by the uncoordinated rotation speed of the unwinding roller and the traction roller, and is beneficial to the stability and reliability of unwinding and labeling.

Description

Technical Field

[0001] The present application relates to the field of labeling equipment, in particular to a labeling machine. Background Art

[0002] In long-roll, automatic unwinding labeling machines, the stability of the paper tape is crucial. Ensuring that the paper tape remains taut during its running process can ensure the continuous circulation of the paper tape and the matching and reliable speed of unwinding and rewinding.

[0003] Generally, a set of driving and braking unwinding rollers and rewinding rollers are respectively configured, so that both the unwinding rollers and rewinding rollers are active rollers. In this way, the unwinding roller can actively rotate to release the paper tape, and the rewinding roller can actively rotate to recycle the paper tape.

[0004] The conventional structure not only requires the configuration of multiple sets of drives, which increases costs, but also requires complex control programs to constantly coordinate the speed of unwinding and rewinding, resulting in difficulties in the early debugging and subsequent maintenance of the automatic unwinding labeling machine. Summary of the Invention

[0005] The purpose of this application is to overcome the deficiencies in the prior art and provide a labeling machine.

[0006] To achieve the above technical objectives, the present application provides a labeling machine, comprising: a unwinding roller for placing a paper roll, the paper roll being wound by a paper tape with label paper affixed to the paper tape; a labeling assembly, arranged downstream of the unwinding roller, for removing the label paper from the paper tape so as to facilitate the label paper being affixed to the object to be labeled; a traction roller, arranged downstream of the unwinding roller, for pulling the paper tape to move downstream; a rewinding roller, arranged downstream of the traction roller, for rewinding the paper tape; a rotary drive assembly, for driving the traction roller and the rewinding roller to rotate; an unwinding tensioning assembly, the unwinding tensioning assembly comprising: a first swing roller, arranged at one side of the unwinding roller, the paper tape released by the unwinding roller extending downstream after passing through the first swing roller; a first swing arm, the first swing roller being arranged at one end of the first swing arm; a first rotating shaft, the first rotating shaft being arranged at the other end of the first swing arm; a cam, arranged on the first rotating shaft; a second swing arm, arranged below the cam, one end of the second swing arm The cam is counteracted by the cam; the second rotating shaft, the other end of the second swing arm is connected to the second rotating shaft; the fixed wheel is connected to the unwinding roller; the fixed wheel belt is provided on the second swing arm and is used to connect the fixed wheel; the unwinding tensioning assembly includes a relaxed state and a tensioned state; when the paper tape is brought along, the first swing roller is pulled, the first swing roller drives the first swing arm to rotate around the first rotating shaft, the first rotating shaft rotates, so that the wheel surface of the cam turns away from the second swing arm, the second swing arm follows the cam and rotates around the second rotating shaft, the fixed wheel belt loosens the fixed wheel, the unwinding tensioning assembly enters a relaxed state, and the unwinding roller is pulled by the paper tape and rotates to unwind; after the unwinding roller pays out the paper tape, the first swing roller drives the first swing arm to rotate, the first rotating shaft rotates, so that the wheel surface of the cam turns to the second swing arm, the second swing arm is pressed down, the fixed wheel belt re-covers the fixed wheel, so that the fixed wheel cannot rotate, the unwinding tensioning assembly enters a tensioned state, and the unwinding roller no longer rotates.

[0007] Furthermore, the labeling machine also includes a first mounting seat, which is used to install the unwinding roller and the unwinding tensioning assembly, and the unwinding roller, the first rotating shaft and the second rotating shaft are all rotatably arranged in the first mounting seat; and / or, the unwinding tensioning assembly also includes a supporting wheel, which is provided at one end of the second swing arm and is used to abut against the cam; and / or, the unwinding tensioning assembly also includes a first limit member, which is provided on a side of the first swing arm away from the second swing arm, and when the first swing arm swings in a direction away from the traction roller, the first swing arm can abut against the first limit member; and / or, the unwinding tensioning assembly also includes a second limit member, which is provided on a side of the second swing arm away from the first swing arm, and when the second swing arm is pressed to swing down, the second swing arm can abut against the second limit member.

[0008] Furthermore, the unwinding roller includes: a first shaft seat, rotatably arranged on the first mounting seat; a screw, rotatably arranged on the first shaft seat; a wedge block, threadedly connected to the screw; a movable block, the wedge block and the movable block are provided with inclined surfaces that can stick to each other; a sleeve, which is sleeved outside the screw and connected to the first shaft seat, and a limiting hole is opened on the sleeve, and the movable block is exposed to the outside through the limiting hole; when the screw rotates, the wedge block can move along the axial direction of the screw, and the wedge block can push the movable block, so that the movable block protrudes out of the limiting hole or is retracted into the limiting hole, so that the movable block can tighten or loosen the paper roll.

[0009] Furthermore, the unwinding roller also includes: a screw cap, which is connected to the screw, and the worker can rotate the screw by rotating the screw cap; and / or, an expansion block, which is arranged outside the sleeve and connected to the movable block, and the surface of the expansion block is provided with an anti-slip structure, and the expansion block is used to tighten the paper roll; and / or, an end limit plate, which is provided at one end of the sleeve close to the first shaft seat; and / or, a front end limit plate, which is detachably provided on the sleeve; and / or, the screw adopts a double-rotation screw, and the screw is provided with two sections of threads with different rotation directions. The unwinding roller includes two wedge blocks, and the two wedge blocks are respectively connected to a section of the thread of the screw. Any wedge block is provided with four sets of inclined guide parts, and the two wedge blocks are symmetrically arranged. The unwinding roller also includes four movable blocks, and any movable block is provided with two inclined force-bearing parts. The two inclined force-bearing parts on the same movable block are symmetrically arranged, and one movable block can be attached to the two wedge blocks.

[0010] Furthermore, the labeling machine also includes a pressing component, which is arranged on one side of the traction roller and is used to cooperate with the traction roller to clamp the paper tape.

[0011] Furthermore, the clamping assembly includes: a fixed shaft, fixedly arranged on one side of the traction roller; a turntable, rotatably arranged on the fixed shaft; a pressure roller, rotatably arranged on the turntable, for abutting the traction roller; a limiting roller, rotatably arranged on the turntable, and located on one side of the pressure roller, capable of cooperating with the pressure roller to abut the traction roller; wherein, a guide hole is provided on the turntable, the guide hole extends toward the traction roller, an elastic member is provided in the guide hole, the axial end of the pressure roller is inserted into the guide hole and connected to the elastic member; when the turntable rotates forward, the pressure roller approaches to abut the traction roller, and the elastic member is compressed; along the forward rotation direction of the turntable, the limiting roller is provided at the rear side of the pressure roller, and after the limiting roller abuts the traction roller with the pressure roller, the limiting roller can prevent the turntable from continuing to rotate; when the turntable rotates reversely, the pressure roller and the limiting roller move away from the traction roller, and the elastic member recovers.

[0012] Furthermore, the roller surface of the pressure roller is made of metal, and the roller surface of the pressure roller is engraved with an anti-slip pattern; and / or, the roller surface of the limiting roller is made of rubber; and / or, a handle is provided on the turntable, and the worker can rotate the turntable through the handle; and / or, a sliding sleeve is provided on the fixed shaft, the sliding sleeve can support the turntable, and the position of the sliding sleeve on the fixed shaft is adjustable.

[0013] Furthermore, the labeling machine also includes a second mounting seat, which is used to mount the winding roller; the winding roller includes: a second shaft seat, which is rotatably arranged in the second mounting seat; a winding shaft, which is arranged on the second shaft seat for winding the paper tape; a linkage wheel, a first slot is provided on the linkage wheel, and the linkage wheel can be sleeved on the end of the second shaft seat away from the winding shaft through the first slot, and a second slot is provided outside the first slot, and the slot diameter of the second slot is larger than the slot diameter of the first slot; a tower-shaped torsion spring is provided between the linkage wheel and the second shaft seat; wherein, the second shaft seat is provided with a third slot at one end for connecting the linkage wheel, and the tower-shaped torsion spring is located between the second slot and the third slot; the rotation drive assembly is used to drive the linkage wheel to rotate, and when the linkage wheel rotates forward, the tower-shaped torsion spring expands and can tighten the second shaft seat, so that the linkage wheel drives the winding shaft to rotate; when the linkage wheel rotates reversely, the tower-shaped torsion spring retracts, and the linkage wheel cannot drive the winding shaft to rotate.

[0014] Furthermore, the labeling assembly includes: a fixed pressure plate and a movable printing plate, between which the paper tape passes; an auxiliary guide roller, which is arranged downstream of the fixed pressure plate and the movable printing plate and is used to pull the paper tape to move downstream; a guide rod, which is arranged downstream of the auxiliary guide roller, and the paper tape changes direction after passing around the guide rod, and the support part of the guide rod for guiding the paper tape to change direction is acute-angled.

[0015] Furthermore, the labeling component also includes a detection member, which is arranged upstream of the fixed pressure plate and the movable printing plate, and is used to detect the distance between two adjacent label papers on the paper tape; and / or, the labeling component also includes: a third rotating shaft, on which the movable printing plate is arranged; a fourth rotating shaft, which is arranged parallel to the third rotating shaft, and a joint is respectively provided on the third rotating shaft and the fourth rotating shaft, and a connecting shaft is provided between the two joints, and the connecting shaft is rotatably connected to the third rotating shaft and the fourth rotating shaft respectively; a spring, which is sleeved on the connecting shaft; a buckle, which is connected to the fourth rotating shaft; a clamping block, which is arranged on the fixed pressure plate; the buckle is rotated to make the buckle move toward the clamping block, and the fourth rotating shaft rotates, and drives the third rotating shaft to rotate through the joint and the connecting shaft, and the third rotating shaft drives the movable printing plate to rotate, so that the movable printing plate abuts against the fixed pressure plate, and the spring is compressed and can press the third rotating shaft, thereby fixing the movable printing plate and the fixed pressure plate.

[0016] The present application provides a labeling machine, comprising a unwinding roller, a labeling assembly, a traction roller, a winding roller and a rotary drive assembly, the rotary drive assembly is used to drive the traction roller and the winding roller to rotate, so that the paper tape passes through the labeling assembly, and the empty paper tape is recovered by the winding roller after the label paper is labeled; the labeling machine also includes an unwinding and tensioning assembly, the unwinding and tensioning assembly comprises a first swing roller, a first swing arm, a first rotating shaft, a cam, a second swing arm, a second rotating shaft, a fixed wheel and a fixed wheel belt, the unwinding and tensioning assembly links the first swing roller and the unwinding roller, the first swing roller rotates forward, and can cooperate with the traction roller to achieve stable tape running while keeping the paper tape tensioned; as the first swing roller continues to approach the traction roller, when the paper tape pre-stored on the first swing roller is exhausted, the unwinding and tensioning assembly releases the unwinding roller through the linkage structure, and utilizes the traction roller to release the unwinding roller. The traction force of the lead roller on the paper tape prompts the unwinding roller to release the paper tape; during the process of unwinding the paper tape, the first swing roller gradually moves away from the traction roller, maintaining the tension on the paper tape while pre-storing the paper tape; when the first swing roller completes the pre-storage of the paper tape, the unwinding tensioning assembly fixes the unwinding roller again through the linkage structure, so that the amount of paper tape on the tape path is always kept in a controllable state by the first swing roller and the traction roller; the automatic unwinding labeling machine set in the present application no longer relies on driving the unwinding roller to actively release the paper tape, but realizes the tape feeding and ensures the tension of the paper tape through the reciprocating linkage unwinding tensioning assembly. Such a setting greatly simplifies the unwinding control, can avoid the unstable paper tape tension caused by the uncoordinated rotation speed of the unwinding roller and the traction roller, and is beneficial to the stability and reliability of unwinding labeling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure of a labeling machine provided in this application;

[0018] Figure 2 for Figure 1 The main structural diagram of the labeling machine shown;

[0019] Figure 3 for Figure 1 The schematic diagram of the structure of the unwinding roller and unwinding tensioning assembly in the labeling machine shown;

[0020] Figure 4 for Figure 1 The structural diagram of the unwinding roller in the labeling machine shown;

[0021] Figure 5 for Figure 4 The unwinding roller shown is a schematic structural diagram with some structures omitted;

[0022] Figure 6 for Figure 5 A cross-sectional view of the structure of the unwinding roller shown;

[0023] Figure 7 for Figure 5The exploded view of the structure of the screw, wedge block and movable block in the unwinding roller is shown;

[0024] Figure 8 for Figure 1 The schematic diagram of the structure of the traction roller, winding roller and pressing assembly in the labeling machine shown;

[0025] Figure 9 for Figure 8 A schematic structural diagram of the compression assembly shown;

[0026] Figure 10 for Figure 1 The structural diagram of the winding roller in the labeling machine shown;

[0027] Figure 11 for Figure 10 A cross-sectional view of the structure of the winding roller shown;

[0028] Figure 12 for Figure 1 The structural diagram of the labeling assembly in the labeling machine shown;

[0029] Figure 13 for Figure 12 The schematic diagram of the structure of the linkage mechanism in the labeling assembly shown. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0031] The present application provides a labeling machine, comprising: an unwinding roller 10, for placing a paper roll, the paper roll being wound from a paper tape with label paper affixed to the paper tape; a labeling assembly 40, arranged downstream of the unwinding roller 10, for removing the label paper from the paper tape so that the label paper can be affixed to an object to be labeled; a traction roller 1, arranged downstream of the unwinding roller 10, for pulling the paper tape downstream; a rewinding roller 20, arranged downstream of the traction roller 1, for rewinding the paper tape; and a rotation drive assembly, for driving the traction roller 1 and the rewinding roller 20 to rotate.

[0032] For details, please refer to Figure 1 and Figure 2In the illustrated embodiment, the paper roll with the label paper is put on the unwinding roller 10; the unwinding roller 10 is a passive roller; the paper tape of the paper roll is wound around the labeling component 40 and the traction roller 1 and is recovered by the reeling roller 1; when the paper tape passes through the labeling component 40, the labeling component 40 can remove the label paper thereon; the traction roller 1 and the reeling roller 20 are both active rollers, which can actively rotate under the drive of the rotary drive component; the traction roller 1 can pull the paper tape from the unwinding roller 10 to the labeling component 40 and the reeling roller 20; the reeling roller 20 can actively wind the paper tape so that the paper tape can be wound into a roll, which is convenient for recycling and unloading.

[0033] The labeling assembly 40 may be used only to remove label paper, or to assist in pasting label paper, or to mark label paper so as to print desired patterns or text on the label paper.

[0034] The rotary drive assembly may include two sets of drive components (such as motors, etc.), and the traction roller 1 and the winding roller 20 are respectively connected to a set of drive components and can rotate independently under the drive of the corresponding drive components; the rotary drive assembly may also include only one set of drive components, and the synchronous drive and drive speed adjustment of the traction roller 1 and the winding roller 20 are achieved through a gear set and a synchronous belt.

[0035] Furthermore, the labeling machine provided in the present application also includes a reeling and tensioning assembly 50, which includes: a first swing roller 51, which is provided on one side of the reeling roller 10, and the paper roll released by the reeling roller 10 is wound around the first swing roller 51 and extends downstream; a first swing arm 52, and the first swing roller 51 is provided at one end of the first swing arm 52; a first rotating shaft 53, and the first rotating shaft 53 is provided at the other end of the first swing arm 52; a cam 54, which is provided on the first rotating shaft 53; a second swing arm 55, which is provided below the cam 54, and one end of the second swing arm 55 is against the cam 54; a second rotating shaft 56, and the other end of the second swing arm 55 is connected to the second rotating shaft 56; a fixed wheel 57, which is connected to the reeling roller 10; and a fixed wheel belt 58, which is provided on the second swing arm 55 and is used to connect the fixed wheel 57.

[0036] For details, please refer to Figures 1 to 3 In the illustrated embodiment, the labeling machine further includes a main chassis 63 and a first mounting base 61. Circuit structures such as the power supply, wiring, and controller are disposed within the main chassis 63, and the rotary drive assembly is also concealed within the main chassis 63. The first mounting base 61 is disposed on the main chassis 63 and is used to mount the unwinding roller 10 and the unwinding tensioning assembly 50. The unwinding roller 10, the first rotating shaft 53, and the second rotating shaft 56 are all rotatably disposed within the first mounting base 61. The first mounting base 61 provides a location for the unwinding roller 10 and the unwinding tensioning assembly 50, and can also conceal and protect the linkage components of the unwinding roller 10 and the unwinding tensioning assembly 50, thereby providing both aesthetics and safety.

[0037] Continue to refer to Figure 3 One end of the first rotating shaft 53 is arranged in the first mounting seat 61 and is rotatably connected to the first mounting seat 61, and the other end is fixedly connected to the first swing arm 52; the cam 54 is eccentrically arranged on the first rotating shaft 53, and the distance between the wheel surface of the cam 54 and the axis center of the first rotating shaft 53 is different; the first swing roller 51 is rotatably arranged on the first swing arm 52, and the paper tape passes around the first swing roller 51. When the paper tape is traveling, the roller surface of the first swing roller 51 can offset the friction between itself and the paper tape by rotating, thereby avoiding obstruction of the normal running of the paper tape when the first swing roller 51 tensions the paper tape. The paper belt pulls the first swing roller 51 toward the traction roller 1 and swings. The first swing roller 51 drives the first rotating shaft 53 to rotate through the first swing arm 52. The first rotating shaft 53 further drives the cam 54 to rotate. The cam 54 rotates eccentrically, and the part of its wheel surface with a large convexity gradually moves away from the second swing arm 55. The second swing arm 55 follows the cam 54 and swings upward; the first swing roller 51 swings in the opposite direction, and the cam 54 rotates eccentrically in the opposite direction, and the part of its wheel surface with a large convexity gradually approaches the second swing arm 55. The second swing arm 55 is pressed downward by the cam 54 and swings downward.

[0038] Continue to refer to Figure 3 One end of the second swing arm 55 is rotatably arranged in the first mounting seat 61 through the second rotating shaft 56, and the other end is against the cam 54. The middle part of the second swing arm 55 is provided with a ring-shaped fixed wheel belt 58 that can be sleeved on the fixed wheel 57.

[0039] Continue to refer to Figure 3 When the cam 54 rotates clockwise, the convexity of the wheel surface of the cam 54 used to abut against the second swing arm 55 gradually decreases, and the second swing arm 55 will swing upward following the wheel surface of the cam 54; at this time, the second swing arm 55 will rotate counterclockwise around the second rotating shaft 56, the second swing arm 55 will be lifted up, the fixed wheel belt 58 will be lifted, and the fixed wheel belt 58 will be separated from the fixed wheel 57. After the fixed wheel 57 is released, the force of the traction roller 1 to pull the paper tape can pull the paper roll, causing the unwinding roller 10 to rotate and release the paper tape in the paper roll.

[0040] Continue to refer to Figure 3 When the cam 54 rotates counterclockwise, the convexity of the wheel surface of the cam 54 that is used to abut against the second swing arm 55 gradually increases, and the second swing arm 55 will swing downward to meet the wheel surface of the cam 54; at this time, the second swing arm 55 will rotate clockwise around the second rotating shaft 56, the second swing arm 55 swings down, the fixed wheel belt 58 is pulled down, the fixed wheel belt 58 is covered with the fixed wheel 57, and after the fixed wheel 57 is pressed, the active roller 10 cannot rotate.

[0041] The first swing arm 52 is driven by the first swing roller 51, and the second swing arm 55 is driven by the first swing roller 51 to rotate around the first rotating shaft 53. The first rotating shaft 53 rotates, causing the wheel surface of the cam 54 to turn away from the second swing arm 55. The second swing arm 55 rotates with the cam 54 around the second rotating shaft 56. The fixed wheel belt 58 loosens the fixed wheel 57. The unwinding tensioning assembly 50 enters the relaxed state, and the unwinding roller 10 is pulled by the paper tape and rotates to unwind. After the unwinding roller 10 releases the paper tape, the first swing roller 51 drives the first swing arm 52 to rotate, the first rotating shaft 53 rotates, causing the wheel surface of the cam 54 to turn to the second swing arm 55. The second swing arm 55 is pressed down, and the fixed wheel belt 58 re-covers the fixed wheel 57, making it unable to rotate. The unwinding tensioning assembly 50 enters the tensioned state, and the unwinding roller 10 no longer rotates.

[0042] In a specific embodiment, referring to Figure 3 , the unwinding tensioning assembly 50 is in a tensioned state, the unwinding roller 10 remains stationary, the traction roller 1 actively rotates and pulls the paper tape to move downstream; the paper tape continues to run, pulling the first swing roller 51 to swing clockwise; the first swing roller 51 drives the first swing arm 52 and the first rotating shaft 53 to rotate clockwise, the cam 54 is used to contact the wheel surface of the second swing arm 55 and the convexity of the second swing arm 55 is continuously reduced, the second swing arm 55 is gradually lifted up, and finally, the fixed wheel belt 58 releases the fixed wheel 57; the unwinding tensioning assembly 50 enters a relaxed state, the tension of the paper tape belt will pull the unwinding roller 10, causing the unwinding roller 10 to rotate and release the paper roll, and the paper roll is pulled open; the paper tape is lengthened, and the first swing roller 51 The first swing arm 52 and the first rotating shaft 53 rotate counterclockwise, and the cam 54 is used to contact the wheel surface of the second swing arm 55. The convexity of the wheel surface continues to increase, and the cam 54 continuously presses down the second swing arm 55, so that the second swing arm 55 continues to swing down, and the second swing arm 55 drives the fixed wheel belt 58 to continuously approach the fixed wheel 57; after the unwinding roller 10 releases the preset length of paper tape, the first swing roller 51 rotates counterclockwise to the initial position. At this time, the second swing arm 55 also returns to the initial position under the pressure of the cam 54, and the fixed wheel belt 58 presses the fixed wheel 57. The unwinding tensioning assembly 50 returns to the tensioned state, and the unwinding roller 10 stops rotating and no longer releases the paper roll.

[0043] It is easy to understand that when the first swing roller 51 returns to the initial position, the distance between the first swing roller 51 and the traction roller 1 is the largest, which makes the amount of paper tape on the tape path the largest; the first swing roller 51 can stretch the paper tape to ensure the tension of the paper tape; as the traction roller 1 continues to pull the paper tape and the paper tape is wound, the amount of paper tape on the tape path gradually decreases, and the first swing roller 51 will swing toward the traction roller 1, by reducing the distance between itself and the traction roller 1, ensuring that the paper tape remains in a tensioned state; when the first swing roller 51 swings forward to the preset position When the paper tape is unwound, the fixed belt 58 disengages from the fixed wheel 57, and the force of the traction roller 1 pulling the paper tape can pull the paper roll, causing the paper roll and the unwinding roller 10 to rotate; when the paper tape is unwound, the first swing roller 51 will swing away from the traction roller 1, and continue to ensure that the paper tape remains in a tensioned state by increasing the distance between itself and the traction roller 1; when the first swing roller 51 swings back to the initial position in the opposite direction, the fixed belt 58 presses the fixed wheel 57 again, so that the paper roll and the unwinding roller 10 remain stationary and no longer unwind. At this time, the first swing roller 51 cooperates with the traction roller 1 to continue to move the tape.

[0044] In summary, by setting up the unwinding and tensioning assembly 50, the first swing roller 51 rotates in the forward direction and can cooperate with the traction roller 1 to achieve stable tape running while keeping the paper tape tensioned; as the first swing roller 51 continues to approach the traction roller 1, when the paper tape pre-stored in the first swing roller 51 is released, the unwinding and tensioning assembly 50 releases the unwinding roller 10 through the linkage structure, and uses the traction force of the traction roller 1 on the paper tape to prompt the unwinding roller 10 to release the paper tape; in the process of paper tape release, the first swing roller 51 gradually moves away from the traction roller 1, and keeps the paper tape tensioned while pre-storing the paper tape; when the first swing roller 51 completes the pre-storage of the paper tape, the unwinding and tensioning assembly 50 fixes the unwinding roller 10 again through the linkage structure, so that the amount of paper tape on the tape running path is always kept in a controllable state by the first swing roller 51 and the traction roller 1.

[0045] The automatic unwinding labeling machine set up in the present application no longer relies on driving the unwinding roller 10 to actively release the paper tape, but realizes the paper tape running and ensures the tension of the paper tape through the reciprocating unwinding tensioning component 50. Such a setting greatly simplifies the unwinding control, and can avoid the unstable paper tape tension caused by the uncoordinated rotation speed of the unwinding roller 10 and the traction roller 1, which is beneficial to the stability and reliability of unwinding labeling.

[0046] To ensure that the second swing arm 55 swings following the cam 54, in one embodiment, the second swing arm 55 is connected to the cam 54 by a wire or a spring; when the convexity of the wheel surface of the cam 54 against the second swing arm 55 gradually increases, the second swing arm 55 is continuously pressed down, and the wire or spring adapts to the relative position of the cam 54 and the second swing arm 55 through deformation; when the convexity of the wheel surface of the cam 54 against the second swing arm 55 gradually decreases, the wire or spring can pull the second swing arm 55, causing the second swing arm 55 to swing upward.

[0047] In another embodiment, the unwinding and tensioning assembly 50 further includes an elastic member connected to the second swing arm 55. When the second swing arm 55 is pressed downward, the elastic member deforms and tends to return to its original shape. When the convexity of the wheel surface of the cam 54 against the second swing arm 55 gradually decreases by 5, the elastic member recovers and pushes the second swing arm 55 in the reverse direction, causing the second swing arm 55 to swing upward.

[0048] The elastic member can be a structural member with elastic deformation ability such as a spring or a shrapnel, or can be made of flexible materials such as rubber or plastic.

[0049] For example, one end of the elastic member is connected to the second swing arm 55, and the other end is connected to the first mounting seat 61; when the cam 54 presses down the second swing arm 55, the elastic member is compressed and has an elastic force of extension, and the elastic force acts in the opposite direction on the second swing arm 55, which is conducive to the second swing arm 55 pressing against the cam 54; when the convexity of the wheel surface of the cam 54 against the second swing arm 55 decreases, the elastic member recovers and pushes up the second swing arm 55, so that the second swing arm 55 follows the cam 54.

[0050] Optionally, the unwinding and tensioning assembly 50 further includes an abutting wheel 55 a , which is provided at one end of the second swing arm 55 and is used to abut against the cam 54 .

[0051] For details, please refer to Figure 3 In the illustrated embodiment, the left end of the second swing arm 55 is rotatably disposed in the first mounting seat 61 through the second rotating shaft 56, and the right end is provided with a supporting wheel 55a, which is rotatably disposed on the second swing arm 55.

[0052] The abutting wheel 55a abuts against the cam 54. When the first swing roller 51 rotates and causes the first rotating shaft 53 and the cam 54 to rotate through the first swing arm 52, the abutting wheel 55a abutting against the cam 54 can offset the friction between itself and the cam 54 by rotating on its own. In this way, the cam 54 can be prevented from being affected by the friction and hindering the rotation of the first rotating shaft 53, and the part where the abutting wheel 55a abuts against the cam 54 can be protected, avoiding mutual wear between the abutting wheel 55a and the cam 54.

[0053] Optionally, the unwinding tensioning assembly 50 further includes a first limit member 59a, which is disposed on a side of the first swing arm 52 away from the second swing arm 55. When the first swing arm 52 swings away from the traction roller 1, the first swing arm 52 can abut against the first limit member 59a.

[0054] Optionally, the unwinding and tensioning assembly 50 further includes a second limiter 59b, which is disposed on a side of the second swing arm 55 away from the first swing arm 52. When the second swing arm 55 is pressed and swings downward, the second swing arm 55 can abut against the second limiter 59b.

[0055] The first limiting member 59a and the second limiting member 59b can be any block, rod or other structure, as long as they can block the first swing arm 52 or the second swing arm 55 and prevent them from continuing to rotate.

[0056] For details, please refer to Figure 3 In the illustrated embodiment, a first limiter 59a is provided on the upper side of the first swing arm 52; when the first swing roller 51 rotates counterclockwise, the first swing arm 52 is restricted by the first limiter 59a and eventually stays at the initial position without continuing to rotate counterclockwise due to inertia, thereby avoiding damage to the paper tape due to excessive rotation of the first swing roller 51.

[0057] Continue to refer to Figure 3 , a second limit piece 59b is provided on the lower side of the second swing arm 55; when the first swing roller 51 rotates counterclockwise, the convexity of the wheel surface of the cam 54 used to abut against the second swing arm 55 gradually increases, the cam 54 continuously presses down the second swing arm 55, and the second swing arm 55 swings down clockwise. Restricted by the second limit piece 59b, the second swing arm 55 can eventually stay in the initial position and will not continue to rotate clockwise due to inertia of movement, thereby preventing the second swing arm 55 from pulling down the fixed wheel belt 58 excessively, causing the fixed wheel belt 58 to damage the fixed wheel 57.

[0058] Figure 3 In the illustrated embodiment, the unwinding and tensioning assembly 50 includes a first limiter 59a and a second limiter 59b. When the unwinding and tensioning assembly 50 is in the relaxed state, the unwinding roller 10 rotates to unwind, and the first swing roller 51 swings counterclockwise back to its initial position. The first swing arm 52 eventually abuts the first limiter 59a, while the second swing arm 55 simultaneously abuts the second limiter 59b. The first and second swing arms 52, 55 are restrained by their respective limiters and ultimately remain in their respective initial positions. At this point, the fixed belt 58 compresses the fixed wheel 57, and the first swing roller 51 tensions the paper tape. The first and second limiters 59a, 59b cooperate to limit the range of motion of the first and second swing arms 52, 55, ensuring the reliability of the linkage structure of the unwinding and tensioning assembly 50 while preventing the linkage structure from operating beyond its specified range in the event of an accident.

[0059] in addition, Figure 3 In the illustrated embodiment, the first limit member 59a and the second limit member 59b are both small wheels, and the parts of the first limit member 59a and the second limit member 59b that are used to contact the first swing arm 52 or the second swing arm 55 are arc surfaces; in this way, the limit members can not only reliably support the first swing roller 51 or the second swing arm 55, but also reduce the friction when contacting the first swing roller 51 or the second swing arm 55 by rotating on their own.

[0060] Optionally, the unwinding and tensioning assembly 50 further includes a third limiting member 59c. When the first swing arm 52 abuts against the third limiting member 59c, the unwinding and tensioning assembly 50 enters a relaxed state.

[0061] For details, please refer to Figure 3 In the illustrated embodiment, a third limiter 59c is provided on the lower side of the first swing arm 52; when the traction roller 1 pulls the paper tape and the paper tape pulls the first swing arm 52 to swing clockwise downward, the first swing arm 52 can abut against the third limiter 59c, and the third limiter 59c can prevent the first swing arm 52 from continuing to swing downward due to inertia, thereby ensuring that the first swing arm 52 can only swing to a preset position.

[0062] Figure 3 In the embodiment shown, a first limit member 59a is provided on the upper side of the first swing arm 52 and a third limit member 59c is provided on the lower side. The two limit members cooperate to limit the swing range of the first swing arm 52. By ensuring that the first swing arm 52 swings within the preset range, it can avoid the first swing arm 52 exceeding the limit position in an accidental situation, which ultimately leads to the uncontrollable tension of the paper tape.

[0063] The configuration of the third limiting member 59c is similar to that of the first limiting member 59a and the second limiting member 59b, and details thereof will not be repeated.

[0064] In one embodiment, the unwinding roller 10 includes: a first shaft seat 11, which is rotatably disposed on the first mounting seat 61; a screw rod 12, which is rotatably disposed on the first shaft seat 11; a wedge block 13, which is threadedly connected to the screw rod 12; a movable block 14, and the wedge block 13 and the movable block 14 are provided with inclined surfaces that can abut against each other; a sleeve 15, which is sleeved outside the screw rod 12 and connected to the first shaft seat 11, and a limiting hole is provided on the sleeve 15, and the movable block 14 is exposed to the outside through the limiting hole; when the screw rod 12 rotates, the wedge block 13 can move axially along the screw rod 12, and the wedge block 13 can push the movable block 14, so that the movable block 14 protrudes out of the limiting hole or is retracted into the limiting hole, so that the movable block 14 can tighten or loosen the paper roll.

[0065] For details, please refer to Figures 4 to 7In the illustrated embodiment, the first shaft seat 11 is rotatably connected to the first mounting seat 61 through a bearing, one end of the first shaft seat 11 is connected to the fixed wheel 57, and the other end is connected to the screw 12; one end of the screw 12 is rotatably provided on the first shaft seat 11 through a bearing, and the other end is rotatably connected to the sleeve 15 through another bearing; the sleeve 15 is sleeved on the screw 12, one end of the sleeve 15 is rotatably connected to the screw 12, and the other end is fixedly connected to the first shaft seat 11; the limiting hole provided on the sleeve 15 extends along the axial direction of the screw 12, and the movable block 14 is clamped in the limiting hole, and the limiting hole can limit the position of the movable block 14 and make The movable block 14 can only move out or retract in the radial direction; an inclined force-bearing portion is provided on the side of the movable block 14 in the limiting hole, and an inclined guide portion is provided on the side of the wedge block 13 facing away from the screw 12. The inclined force-bearing portion and the inclined guide portion are in the same inclination direction and can fit together; when the inclined force-bearing portion and the inclined guide portion are in contact with each other, the movable block 14 is in a fully recovered state, and the outer diameter of the unwinding roller 10 is the smallest at this time; the screw 12 is rotated and the wedge block 13 moves, the inclined force-bearing portion and the inclined guide portion are staggered, and the wedge block 13 can push the movable block 14 away, so that the movable block 14 further protrudes out of the limiting hole, and the outer diameter of the unwinding roller 10 increases at this time.

[0066] It is easy to understand that when the movable block 14 is retracted into the limiting hole, the outer diameter of the unwinding roller 10 becomes smaller, so as to facilitate the insertion or removal of the paper roll; when the movable block 14 protrudes out of the limiting hole, the outer diameter of the unwinding roller 10 becomes larger, so as to facilitate the expansion of the paper roll; by rotating the screw 12 and adjusting the position of the wedge block 13 on the screw 12, the extension degree of the movable block 14 can be adjusted, thereby adjusting the outer diameter of the unwinding roller 10, so that the unwinding roller 10 can expand paper rolls with different inner cylinder sizes, thereby improving the applicability of the labeling machine.

[0067] Optionally, the unwinding roller 10 further includes a screw cap 16 , which is connected to the screw 12 . A worker can rotate the screw 12 by rotating the screw cap 16 .

[0068] For details, please refer to Figure 6 In the illustrated embodiment, the left end of the screw 12 is rotatably connected to the first shaft seat 11, and the right end is fixedly connected to the screw cap 16; the screw cap 16 is sleeved on the outside of the right end of the sleeve 15, and a bearing is provided between the screw cap 16 and the sleeve 15, so that the rotation of the screw cap 16 and the sleeve 15 does not affect each other; the surface of the screw cap 16 is provided with a plurality of grooves for finger gripping. When in use, the worker can easily rotate the screw cap 16, thereby rotating the screw 12 and realizing the movement of the wedge block 13 on the screw 12.

[0069] Optionally, the unwinding roller 10 further includes an expansion block 17 , which is disposed outside the sleeve 15 and connected to the movable block 14 . The surface of the expansion block 17 is provided with an anti-slip structure, and the expansion block 17 is used to expand the paper roll.

[0070] Please refer to the specific Figure 4 and Figure 5 In the illustrated embodiment, the expansion block 17 is configured as an arc-shaped strip. When the movable block 14 is fully retracted into the retaining hole, the expansion block 17 can abut against the sleeve 15. The surface of the expansion block 17 is inscribed with two sets of inclined grooves, which are inclined toward each other and form multiple diamond-shaped anti-slip blocks. The inclined grooves constitute an anti-slip structure that increases the surface roughness of the expansion block 17, helping the expansion block 17 to firmly secure the paper roll and effectively prevent the paper roll and the expansion block 17 from slipping, thereby improving the unwinding stability of the unwinding roller 10.

[0071] Optionally, the unwinding roller 10 further includes an end limiting plate 18 a , which is disposed at one end of the sleeve 15 close to the first shaft seat 11 .

[0072] For details, please refer to Figure 4 In the illustrated embodiment, the left end of the sleeve 15 is provided with an end stop plate 18a, which is screwed to the left end surface of the sleeve 15. When a new paper roll is inserted into the sleeve 15, it abuts against the end stop plate 18a, which defines the insertion position of the new paper roll and facilitates tape run calibration. During unwinding, the end stop plate 18a also prevents the new paper roll from moving leftward along the sleeve 15.

[0073] Optionally, the unwinding roller 10 further includes a front end limiting plate 18 b , which is detachably disposed on the sleeve 15 .

[0074] For details, please refer to Figure 4 In the illustrated embodiment, a front end limiting plate 18b is provided at the right end of the sleeve 15; by removing the front end limiting plate 18b, the old paper roll on the unwinding roller 10 can be removed and a new paper roll can be inserted into the unwinding roller 10; after the paper roll is installed in place, the front end limiting plate 18b is installed, and the front end limiting plate 18b can be used to limit the paper roll to prevent the paper roll 1 from moving to the right along the sleeve 15 during the unwinding process.

[0075] Among them, the front end limit plate 18b can be fastened to the sleeve 15 by screws (such as setting a waist hole to match the screw hole). By tightening the screws, the front end limit plate 18b can be fixed on the sleeve 15, and by unscrewing the screws, the front end limit plate 18b can be removed.

[0076] Alternatively, the front end limiting plate 18b may also be connected to the sleeve 15 through the form of internal and external threads.

[0077] Alternatively, the front end limit plate 18b is configured as a ring structure, the inner diameter of the front end limit plate 18b is consistent with the inner diameter of the paper roll, and the unwinding roller 10 tightens the front end limit plate 18b while tightening the paper roll.

[0078] This application does not limit the detachable connection method between the front limiting plate 18b and the sleeve 15.

[0079] In a specific embodiment, referring to Figure 4 When a paper roll is installed on the sleeve 15, the left side of the paper roll abuts against the end limit plate 18a and the right side abuts against the front limit plate 18b; the front limit plate 18b includes a circular plate and a ring sleeve, a circular hole is opened at the center of the circular plate, the ring sleeve is fastened to the center of the circular plate by a screw, and the inner hole of the ring sleeve is connected to the circular hole of the circular plate; the aperture of the circular hole of the circular plate is not less than the aperture of the inner hole of the ring sleeve, and the aperture of the inner hole of the ring sleeve is consistent with the inner diameter of the inner tube of the paper roll; after the paper roll is inserted into the sleeve 15 and abuts against the end limit plate 18a, the front limit plate 18b is inserted into the sleeve 15 through the circular hole of the inner hole; after the front limit plate 18b abuts against the paper roll, the screw 12 is rotated, and the expansion block 17 expands radially, tightening the paper roll and the front limit plate 18b. The end stopper plate 18a and the front stopper plate 18b cooperate to restrict the installation position of the paper roll. This ensures that each time a paper roll is replaced, it is ultimately installed in the preset position, facilitating the connection of paper tapes of the same specification after rewinding. Furthermore, the end stopper plate 18a and the front stopper plate 18b prevent the paper tape from moving axially along the sleeve 15, ensuring the stability of the paper tape during unwinding. Furthermore, because the circular plate and the ring of the front stopper plate 18b are connected and removable by screws, the ring can be replaced when inserting a paper roll of a different specification, ensuring that the inner diameter of the new ring matches the inner diameter of the new paper roll's inner barrel. This allows the paper roll and the front stopper plate 18b to be simultaneously tightened by the unwinding roller 10.

[0080] Furthermore, with reference to Figure 6 and Figure 7 In the illustrated embodiment, the screw 12 adopts a double-helical screw, and the screw 12 is provided with two sections of threads with different rotation directions. The unwinding roller 10 includes two wedge blocks 13, and the two wedge blocks 13 are respectively connected to a section of the thread of the screw 12. Any wedge block 13 is provided with four sets of inclined guide parts, and the two wedge blocks 13 are symmetrically arranged. The unwinding roller 10 also includes four movable blocks 14, and any movable block 14 is provided with two inclined force-bearing parts. The two inclined force-bearing parts on the same movable block 14 are symmetrically arranged, and one movable block 14 can be attached to two wedge blocks 13.

[0081] The screw 12 is a twin-thread screw, wherein one wedge block 13 is connected to one thread section of the screw 12 and the other wedge block 13 is connected to the other thread section of the screw 12. When the screw 12 rotates, the two wedge blocks 13 can move toward or away from each other at the same time.

[0082] Because the two wedge blocks 13 are symmetrically positioned, the four inclined guides on each wedge block 13 correspond to each other and are mirror-imaged. Furthermore, because the two inclined force-bearing portions on the movable block 14 are also mirror-imaged, the movable block 14 can simultaneously engage both wedge blocks 13 via these two inclined force-bearing portions. As the screw 12 rotates, the two wedge blocks 13 simultaneously push the movable block 14 apart, allowing the elongated movable block 14 to synchronously protrude from the retaining hole. The two wedge blocks 13 support the elongated movable block 14 from both ends, ensuring a stable position and preventing it from tilting, which helps the movable block 14 steadily tighten the paper roll.

[0083] Continue to refer to Figures 5 to 7 In the illustrated embodiment, four limiting holes are evenly spaced on the surface of the sleeve 15, and a movable block 14 is provided in any limiting hole; the wedge block 13 is arranged in a cross shape, and an inclined guide portion is provided at each of the four corners of the cross; by providing four sets of inclined guide portions and four movable blocks 14, when the unwinding roller 10 expands the paper roll, the four movable blocks 14 can expand synchronously and press against the inner tube of the paper roll along the cross direction. The paper roll is supported by the four parts and can be stably and reliably maintained on the unwinding roller 10.

[0084] Optionally, the labeling machine provided in the present application further includes a clamping assembly 70 , which is disposed on one side of the traction roller 1 and is used to cooperate with the traction roller 1 to clamp the paper tape.

[0085] As is easy to understand, as the paper tape wraps around the traction roller 1, it forms a wrap angle on the traction roller 1. As a result, the traction roller 1 rotates, and the friction between the roller surface and the paper tape propels the paper tape along. However, relying solely on the friction between the roller surface and the paper tape can easily cause the paper tape to slip.

[0086] To this end, a pressing assembly 70 is provided to press the paper tape onto the traction roller 1 through the pressing assembly 70, thereby increasing the friction between the paper tape and the traction roller 1, thereby ensuring that the traction roller 1 pulls the paper tape.

[0087] In order to prevent the clamping assembly 70 from obstructing the normal movement of the paper tape when it cooperates with the traction roller 1 to clamp the paper tape, optionally, the clamping assembly 70 uses a roller to press the paper tape. The wheel surface of the roller can not only press the paper tape, but also reduce the influence of pressure on the movement of the paper tape by rotating when the paper tape is moving.

[0088] In one embodiment, the pressing assembly 70 includes a pressing member and a pressing drive member. The pressing drive member can drive the pressing member toward or away from the traction roller 1. The pressing member can be a wheel, ball, or other member that can be easily pressed against the traction roller 1, while the pressing drive member can be a driving member such as a pneumatic cylinder or an electric cylinder. During tape threading, the pressing member is moved away from the traction roller 1 to facilitate winding the paper tape in the labeling machine. After tape threading is completed, the pressing member is pressed against the traction roller 1 by the pressing drive member. The pressing member can press the paper tape against the traction roller 1, thereby ensuring that the paper tape can be pulled by the traction roller 1.

[0089] In another embodiment, the pressing assembly 70 includes: a fixed shaft 71, fixedly arranged on one side of the traction roller 1; a turntable 72, rotatably arranged on the fixed shaft 71; a pressing roller 73, rotatably arranged on the turntable 72, for abutting against the traction roller 1; a limiting roller 74, rotatably arranged on the turntable 72, and located on one side of the pressing roller 73, capable of cooperating with the pressing roller 73 to abut against the traction roller 1; wherein a guide hole is provided on the turntable 72, the guide hole extending toward the traction roller 1, and an elastic member 7 is provided in the guide hole 5. The axial end of the pressure roller 73 is inserted into the guide hole and connected to the elastic member 75; when the turntable 72 rotates in the forward direction, the pressure roller 73 approaches and presses the traction roller 1, and the elastic member 75 is compressed; along the forward rotation direction of the turntable 72, the limiting roller 74 is arranged on the rear side of the pressure roller 73. After the pressure roller 73 presses against the traction roller 1, the limiting roller 74 can prevent the turntable 72 from continuing to rotate; when the turntable 72 rotates in the reverse direction, the pressure roller 73 and the limiting roller 74 move away from the traction roller 1, and the elastic member 75 recovers.

[0090] Please refer to the specific Figure 8 and Figure 9 In the illustrated embodiment, the labeling machine further includes a second mounting base 62, which is arranged on the left side of the main chassis 63. The fixed shaft 71 is fixedly arranged on the second mounting base 62 and is located on the left side of the traction roller 1; a turntable 72 is rotatably arranged on the fixed shaft 71, and the turntable 72 is roughly C-shaped. The middle of the turntable 72 is grooved, and the pressing roller 73 and the limiting roller 74 are rotatably arranged in the middle groove of the turntable 72; the upper and lower groove surfaces of the middle groove of the turntable 72 are respectively provided with a There are two guide holes, each of which is in the shape of a waist hole. An elastic member 75 is respectively provided in the two guide holes, and the elastic member 75 is a spring. One end of any elastic member 75 is connected to the hole wall of the guide hole, and the other end is connected to the axial end of the pressing roller 73. When the pressing roller 73 presses against the traction roller 1, the pressing roller 73 is subjected to the pressure of the traction roller 1 and moves toward the middle groove of the turntable 72. The elastic member 75 is compressed, and the elastic force of the elastic member 75 acts on the pressing roller 73, which helps the pressing roller 73 to press the traction roller 1 tightly.

[0091] Combined with reference Figure 2, rotate the turntable 72 counterclockwise, the pressure roller 73 is in front and preferably presses the traction roller 1, and the limiting roller 74 is at the back. After the pressure roller 73 rotates into place, the limiting roller 74 is at the lower side of the traction roller 1 and presses against the traction roller 1; a wrap angle is formed between the pressure roller 73 and the limiting roller 74, and the traction roller 1 is within the wrap angle, and the three rollers are distributed in a triangular shape; when the paper tape passes around the traction roller 1, it passes between the wrap angles of the three rollers, and the three rollers cooperate to ensure the pressure and traction of the paper tape at the wrap angle; in the process of traction of the paper tape, the three rollers limit each other, which can well ensure position stability, thereby ensuring the pressing state of the pressure roller 73 and the pressure roller 73 and traction roller 1.

[0092] Optionally, the roller surface of the pressing roller 73 is made of metal, and the roller surface of the pressing roller 73 is engraved with an anti-slip pattern.

[0093] For details, please refer to Figure 9 In the illustrated embodiment, the surface of the pressure roller 73 is engraved with a special-shaped pattern. Using a metal material (such as stainless steel) to manufacture the pressure roller 73 ensures its structural rigidity and ensures that it abuts against the traction roller 1. Furthermore, the metal surface is more easily engraved with an anti-slip pattern. This pattern increases the surface roughness of the pressure roller 73, ensuring friction between the pressure roller 73 and the traction roller 1, while also increasing the pressure applied by the pressure roller 73 to the paper strip.

[0094] The present application does not limit the material of the pressure roller 73 and the specific configuration of the anti-slip pattern.

[0095] Optionally, the roller surface of the limiting roller 74 is made of rubber.

[0096] It should be noted that in the pressure assembly 70, the pressure on the paper tape is primarily achieved through the pressure roller 73, while the limiting roller 74 is primarily used to stabilize the position of the pressure roller 73 and prevent the pressure roller 73 from being displaced during the pressure process. Therefore, even if the paper tape and the rubber roller slip, it will not affect the effectiveness of the pressure assembly 70.

[0097] The limiting roller 74 is a rubber roller, and the roller surface made of rubber has a certain material elasticity. When the turntable 73 is rotated so that the clamping roller 73 and the limiting roller 74 press against the traction roller 1, the limiting roller 74 can avoid the rigid collision or friction between the rollers through the elastic deformation of the roller surface, thereby ensuring the safety of the use of the clamping assembly 70.

[0098] Optionally, a handle 76 is provided on the turntable 72 , and a worker can rotate the turntable 72 by using the handle 76 .

[0099] For details, please refer to Figure 8 or Figure 9In the illustrated embodiment, two connecting rods are further provided on the upper surface of the turntable 72. The two connecting rods are respectively provided on both sides of the fixed shaft 71 and extend longitudinally to be higher than the fixed shaft 71. The two connecting rods are connected to the handle 76. The handle 76 has a certain width to facilitate the worker's use.

[0100] Optionally, a sliding sleeve 77 is provided on the fixed shaft 71 , and the sliding sleeve 77 can support the turntable 72 . The position of the sliding sleeve 77 on the fixed shaft 71 is adjustable.

[0101] For details, please refer to Figure 8 or Figure 9 In the illustrated embodiment, the turntable 72 is roughly C-shaped, and a groove is opened in the middle of the turntable 72; the sliding sleeve 77 is arranged in the middle groove of the turntable 72, and the sliding sleeve 77 abuts against the upper groove wall of the middle groove, thereby supporting the turntable 72.

[0102] By adjusting the position of the sliding sleeve 77 on the fixed shaft 71, the height of the sliding sleeve 77 can be adjusted, thereby adjusting the relative position of the turntable 72 and the pulling roller 1. It is easy to understand that when the labeling machine uses paper tapes of different specifications, the widths of the paper tapes are different, resulting in different center positions of the paper tapes. If the pressure roller 73 and the limit roller 74 are pressed against the edge of the paper tape, there is no pressure on the other side of the paper tape, and the paper tape is easily deformed or even displaced. Therefore, it is necessary to adjust the pressure roller 73 and the limit roller 74 to align with the center position of the paper tape.

[0103] By setting the position of the sliding sleeve 77 to be adjustable, the sliding sleeve 77 can be moved to adjust the relative position of the turntable 72 and the traction roller 1 corresponding to the center position of the paper tape, thereby ensuring that the clamping roller 73 and the limiting roller 74 reliably press the paper tape.

[0104] Among them, the sliding sleeve 77 can be set as an inflatable structure; when inflated, the sliding sleeve 77 expands the fixed shaft 71, so that the turntable 72 is fixed on the fixed shaft 71; after deflation, the sliding sleeve 77 can move along the fixed shaft 71, thereby adjusting the position of the turntable 72 on the fixed shaft 71.

[0105] Alternatively, a mounting hole is provided on the sliding sleeve 77, and a plurality of mounting holes are provided on the fixed shaft 71 at intervals along the axial direction. Different mounting holes on the fixed shaft 71 are selected to align with the mounting holes on the sliding sleeve 77, and fasteners (such as screws with matching screw holes) are inserted into the two connected mounting holes. The sliding sleeve 77 can be fixed at different positions on the fixed shaft 71, and the position of the turntable 72 on the fixed shaft 71 can be adjusted.

[0106] This application does not limit the specific method of adjusting the position of the sliding sleeve 77 on the fixed shaft 71.

[0107] Optionally, the labeling machine further includes a second mounting seat 62 for mounting the winding roller 20; the winding roller 20 includes: a second shaft seat 21 rotatably disposed in the second mounting seat 62; a winding shaft 22 disposed on the second shaft seat 21 for winding the paper tape; a linkage wheel 23, the linkage wheel 23 having a first slot a, the linkage wheel 23 being able to pass through the first slot a and be sleeved on an end of the second shaft seat 21 away from the winding shaft 22; a second slot b being further disposed outside the first slot a, the slot diameter of the second slot b being larger than the slot diameter of the first slot a; The tower-shaped torsion spring 24 is arranged between the linkage wheel 23 and the second shaft seat 21; wherein, the second shaft seat 21 is provided with a third slot c at one end for connecting the linkage wheel 23, and the tower-shaped torsion spring 24 is located between the second slot b and the third slot c; the rotation drive assembly is used to drive the linkage wheel 23 to rotate. When the linkage wheel 23 rotates forward, the tower-shaped torsion spring 24 expands and can tighten the second shaft seat 21, so that the linkage wheel 23 drives the winding shaft 22 to rotate; when the linkage wheel 23 rotates reversely, the tower-shaped torsion spring 24 retracts, and the linkage wheel 23 cannot drive the winding shaft 22 to rotate.

[0108] For details, please refer to Figure 8 、 Figure 10 and Figure 11 In the illustrated embodiment, the second shaft seat 21 includes a support shaft and a bearing seat. The bearing seat is fixedly arranged on the second mounting seat 62. One end of the support shaft passes through the second mounting seat 62 and is rotatably connected to the bearing seat through a bearing, and the other end is fixedly connected to the winding shaft 22; a shaft sleeve is also provided at the end of the support shaft away from the winding shaft 22, and a third slot c is provided on the side of the shaft sleeve away from the winding shaft 22.

[0109] Continue to refer to Figure 11 A first slot a is provided at the axis center of the linkage wheel 23, and the first slot a passes through the linkage wheel 23, so that the linkage wheel 23 can be sleeved on the support shaft through the first slot a; the slot diameter of the first slot a is slightly larger than the outer diameter of the support shaft; a circle of second slots b is provided on the outer periphery of the first slot a; when the linkage wheel 23 is sleeved on the support shaft, the second slot b is opposite to the third slot c; at the same time, the linkage wheel 23 is rotatably connected to the outer periphery of the sleeve through a bearing.

[0110] Continue to refer to Figure 11 The tower-shaped torsion spring 24 is formed by spirally winding a metal strip. One end of the tower-shaped torsion spring 24 has a small ring opening and the other end has a large ring opening. When the tower-shaped torsion spring 24 is rotated in the forward direction, the tower-shaped torsion spring 24 can expand and the outer diameter becomes larger. When the tower-shaped torsion spring 24 is rotated in the reverse direction, the tower-shaped torsion spring 24 can contract and the outer diameter becomes smaller.

[0111] Ignoring the tower-shaped torsion spring 24, since the groove diameter of the first slot a is slightly larger than the outer diameter of the support shaft, and the linkage wheel 23 is rotatably connected to the outer periphery of the sleeve through a bearing, when the linkage wheel 23 is rotated under force, it cannot directly drive the second shaft seat 21 and the winding shaft 22 to rotate.

[0112] A tower-shaped torsion spring 24 is provided in the second slot b and the third slot c, with one end of the tower-shaped torsion spring 24 being located in the second slot b and the other end being located in the third slot c; when the linkage wheel 23 drives the tower-shaped torsion spring 24 to rotate forward, the tower-shaped torsion spring 24 expands (expands and lengthens) and simultaneously tightens the second slot b and the third slot c, thereby enabling the rotational force to be transmitted to the second shaft seat 21 through the tower-shaped torsion spring 24, and the second shaft seat 21 can drive the winding shaft 22 to rotate so as to facilitate the winding shaft 22 to wind up the paper tape.

[0113] The pyramid-shaped torsion spring 24 is provided. When the rotation speeds of the winding shaft 22 and the linkage wheel 23 are inconsistent, the pyramid-shaped torsion spring 24 can also slip in the second slot b and the third slot c.

[0114] For example, as the amount of paper tape being wound on the take-up shaft 22 increases and the outer diameter of the paper roll increases, while the paper tape speed and the linear speed of the take-up shaft remain constant, it is necessary to reduce the angular velocity of the take-up shaft 22, that is, reduce the rotational speed of the take-up shaft 2. By allowing the conical torsion spring 24 to slip within the slot, the speed difference between the take-up shaft 22 and the interlocking wheel 23 can be compensated, thus eliminating the need to constantly adjust the drive speed of the rotary drive assembly on the take-up roller 20 and simplifying the take-up control.

[0115] In a specific embodiment, continuous label paper is attached to the paper tape, and the label paper runs along the paper tape to the labeling assembly 40. After the labeling assembly 40 removes the current label paper, the next label paper adjacent to it follows closely and is located in front of the preset labeling station; at this time, it is necessary to reverse the traction roller 1 so that the next label paper returns to the preset labeling station to facilitate the labeling assembly 40 to operate on the label paper.

[0116] Specifically, when the previous label paper is removed, the rotary drive assembly drives the traction roller 1 in the reverse direction, and the traction roller 1 reverses to make the paper tape retreat. At the same time, the first swing roller 51 swings in the reverse direction and the reel 22 rotates in the reverse direction to ensure that the paper tape retreating on the tape path remains in a tensioned state. When the reel 22 rotates in the reverse direction, it drives the tower-shaped torsion spring 24 in the third slot c to rotate in the reverse direction, and the tower-shaped torsion spring 24 is recovered and slips in the second slot b and the third slot c. In this way, during the process of the paper tape retreating, the reel 22 is in a free and relaxed state, and can easily cooperate with the traction roller 1 and the first swing roller 51 to rewind.

[0117] Furthermore, in this embodiment, the rotation drive assembly includes a group of drive motors and two sets of synchronous belt assemblies, and the drive motor simultaneously drives the traction roller 1 and the interlocking wheel 23 to rotate through the two sets of synchronous belt assemblies; when the drive motor outputs in the forward direction, the traction roller 1 pulls the paper tape to move downstream, and the interlocking wheel 23 drives the tower-shaped torsion spring 24 to rotate forward, so that the winding shaft 22 rewinds the paper tape; after a label paper is removed, the drive motor outputs in the reverse direction, the traction roller 1 pulls the paper tape backward, and the interlocking wheel 23 drives the tower-shaped torsion spring 24 to rotate in the reverse direction, the tower-shaped torsion spring 24 contracts and slips in the second slot b and the third slot c, and the winding shaft 22 can freely cooperate with the traction roller 1 to retract the paper tape.

[0118] Optionally, the winding roller 20 also includes: a second swing roller 25, which is arranged on one side of the winding shaft 22, and the paper tape enters the winding shaft 22 after passing through the second swing roller 25; a second swing arm 26, one end of which is rotatably connected to the second shaft seat 21 and the other end is connected to the second swing roller 25.

[0119] For details, please refer to Figure 10 In the illustrated embodiment, a second swing arm 26 extends radially along the take-up shaft 22 and is rotatably mounted on the second shaft seat 21 via a bearing. A second swing roller 25 is rotatably mounted at the end of the second swing arm 26 and extends parallel to the take-up shaft 22. The paper tape is wound around the second swing arm 26, which can swing around the take-up shaft 22 to compensate for the length of the paper tape during winding, thereby stabilizing the take-up tension of the paper tape.

[0120] In one embodiment, the labeling assembly 40 is used for marking the label paper, removing the label paper from the paper tape, and assisting in sticking the label paper to the object to be labeled.

[0121] Specifically, the labeling assembly 40 includes: a fixed pressure plate 41 and a movable printing plate 42, between which the paper tape passes; an auxiliary guide roller 43, which is arranged downstream of the fixed pressure plate 41 and the movable printing plate 42 and is used to pull the paper tape to move downstream; a guide rod 44, which is arranged downstream of the auxiliary guide roller 43, and the paper tape changes direction after passing around the guide rod 44. The support part of the guide rod 44 for guiding the paper tape to change direction is an acute-angled type.

[0122] For details, please refer to Figure 12 In the illustrated embodiment, the fixed pressure plate 41 and the movable printing plate 42 are arranged opposite to each other in the up and down directions, and the paper tape passes through the fixed pressure plate 41 and the movable printing plate 42 from left to right; the label paper is thermal paper, and a heating printing element is provided in the movable printing plate 42. When the movable printing plate 42 presses the label paper onto the fixed pressure plate 41, the required pattern and / or text can be printed on the label paper.

[0123] Continue to refer to Figure 12, an auxiliary guide roller 43 is provided on the right side of the fixed pressure plate 41 and the movable printing plate 42. The auxiliary guide roller 43 is an active roller (the auxiliary guide roller 43 can be driven to rotate synchronously by a rotary drive component, or an additional motor or other driving member can be provided to drive the auxiliary guide roller 43 to rotate). The auxiliary guide roller 43 can rotate actively to facilitate pulling the paper tape into and out of the labeling component 40; a guide rod 44 is provided on the right side of the auxiliary guide roller 43. The guide rod 44 is in a triangular prism shape, and one of the corners of the guide rod 44 is used for the paper tape to change direction; the guide rod 44 is lower than the auxiliary guide roller 43 to facilitate the paper tape to pass through the auxiliary guide The roller 43 has a certain wrap angle, which facilitates the auxiliary guide roller 43 to pull the paper tape; when the paper tape passes through the guide rod 44, the sharp edges can not only cause the paper tape to change direction at a large angle, but also cause the label paper on the paper tape to tilt and detach from the paper tape; as the paper tape continues to change direction and move downward at an angle, the label paper is gradually taken away from the paper tape; so that the object to be labeled is on the lower right side of the guide rod 44, and a suction cup, a pressure plate and other mechanisms that can act on the label paper are arranged on the upper right side of the guide rod 44. By using this mechanism to push the label paper downward, the label paper can be pressed on the object to be labeled, thereby achieving labeling of the labeled object.

[0124] Optionally, the labeling assembly 40 further includes a blowing member, which is arranged on the changing side of the guide rod 44. When the paper tape passes between the blowing member and the guide rod 44, the blowing member can blow air on the label paper to facilitate the label paper to separate from the paper tape.

[0125] For details, please refer to Figure 12 The blowing piece is arranged in a rod shape, and the blowing piece is arranged below the guide rod 44 and parallel to the guide rod 44. After the paper tape changes direction, it passes between the guide rod 44 and the blowing piece; a plurality of blowing holes are provided on the blowing piece, and the blowing holes are arranged tilted upward; the blowing piece is connected to the air supply equipment; when the tape is running, the air supply equipment supplies air to the blowing piece, and the gas is blown toward the label paper through the blowing holes, thereby prompting the label paper to leave the paper tape.

[0126] Optionally, the labeling assembly 40 further includes a detection member 45 , which is disposed upstream of the fixed pressing plate 41 and the movable printing plate 42 and is used to detect the distance between two adjacent label papers on the paper tape.

[0127] The detection element 45 may be a photoelectric sensor, an infrared detector, a CCD camera, or the like.

[0128] After passing through the detection part 45, the paper tape flows to the fixed pressure plate 41 and the movable printing plate 42. The detection part 45 confirms the distance between two adjacent label papers, so as to confirm whether the next label paper is facing the movable printing plate 42 after the current label paper is removed. Only when the label paper is facing the movable printing plate 42 can the movable printing plate 42 accurately mark the label paper.

[0129] It is easy to understand that the spacing between adjacent label papers on a roll of paper cannot be guaranteed to be uniform everywhere. Therefore, it is necessary to constantly know the spacing between two adjacent label papers on the paper tape through the detection member 45, so as to facilitate the movable printing plate 42 to accurately print the label papers.

[0130] The distance between the detection member 45 and the fixed pressure plate 41 and the movable printing plate 42 is determined. After the distance between the two adjacent label papers on the paper tape is known, the previous label paper is printed at the preset station, and the control system can calculate the distance between the next label paper and the preset station; after the previous label paper is removed, the control system can adjust the next label paper to the preset station based on the calculated distance between the next label paper and the preset station by further rotating the traction roller 1 forward or reversely, so that the label paper can be printed.

[0131] To facilitate tape threading, the fixed pressure plate 41 and the movable printing plate 42 can move relative to each other, so that the fixed pressure plate 41 and the movable printing plate 42 are moved away from each other to facilitate the insertion of the paper tape; after the tape threading is completed, the fixed pressure plate 41 and the movable printing plate 42 are moved close to each other to press the paper tape, so that the movable printing plate 42 can print the label paper on the paper tape.

[0132] In one embodiment, the labeling assembly 40 further includes a printing driver, which is used to drive the movable printing plate 42 to move closer to or away from the fixed platen 41; the printing driver can be an electric cylinder, a pneumatic cylinder, etc.

[0133] In another embodiment, the labeling assembly 40 further includes: a third rotating shaft 46a, on which the movable printing plate 42 is disposed; a fourth rotating shaft 46b, which is disposed parallel to the third rotating shaft 46a, and on which a joint 46c is provided respectively; a connecting shaft 46d is disposed between the two joints 46c, and the connecting shaft 46d is rotatably connected to the third rotating shaft 46a and the fourth rotating shaft 46b; a spring 46e, which is sleeved on the connecting shaft 46d; and a buckle 46f, which is It is connected to the fourth rotating shaft 46b; the clamping block 46g is provided on the fixed pressure plate 41; the clamping buckle 46f is rotated to make the clamping buckle 46f move toward the clamping block 46g, and the fourth rotating shaft 46b rotates, driving the third rotating shaft 46a to rotate through the joint 46c and the connecting shaft 46d, and the third rotating shaft 46a drives the movable printing plate 42 to rotate, so that the movable printing plate 42 abuts against the fixed pressure plate 41, and the spring 46e is compressed and can press the third rotating shaft 46a, thereby fixing the movable printing plate 42 and the fixed pressure plate 41.

[0134] For details, please refer to Figure 1 、 Figure 2 、 Figure 12 and Figure 13In the illustrated embodiment, the labeling assembly 40 also includes a third mounting seat 64, which is located on the front side of the main chassis 63. The control panel of the labeling assembly 40's printing system is mounted on the third mounting seat 64 for easy operation. A third rotating shaft 46a and a fourth rotating shaft 46b are rotatably mounted in the third mounting seat 64. One end of the fourth rotating shaft 46b passes through the third mounting seat 64 and connects to a latch 46f. The end of the latch 46f is provided with a slot. The fixed pressure plate 41 is fixed to the main chassis 63 and located below the third mounting seat 64. An I-shaped latch 46g is provided on the fixed pressure plate 41. Rotating the latch 46f clockwise engages the latch 46g in the slot. Using the latch 46f to secure the latch 46g ensures that the movable printing plate 42 remains pressed against the fixed pressure plate 41, facilitating label printing.

[0135] Continue to refer to Figure 13 The upper end of the fourth rotating shaft 46b is provided with a buckle 46f and the lower end is provided with a joint 46c; the lower end of the third rotating shaft 46a is provided with another joint 46c, and the two joints 46c are arranged side by side in the left and right directions; the end of the joint 46c is grooved, and a rotating shaft is provided in the groove, and the connecting shaft 46d is connected to the two rotating shafts and is rotatably connected to the third rotating shaft 46a and the fourth rotating shaft 46b respectively through the two rotating shafts; a spring 46e is sleeved on the connecting shaft 46d, and the two ends of the spring 46e are respectively against the two rotating shafts.

[0136] Continue to refer to Figure 13 When the buckle 46f is rotated toward the block 46g, the fourth shaft 46b rotates leftward, causing the joint 46c at its lower end to rotate leftward. Because the two joints 46c are linked by the movable connecting shaft 46d, the other joint 46c connected to the third shaft 46a is pushed by the connecting shaft 46d and the spring 46e and also rotates leftward. The third shaft 46a drives the movable printing plate 42 to flip toward the fixed pressure plate 41, ultimately forcing the movable printing plate 42 against the fixed pressure plate 41. At this time, the spring 46e is compressed between the two sets of shafts. The restoring force of the spring 46e can reversely compress the joint 46c and the third shaft 46a, thereby ensuring that the movable printing plate 42 remains pressed against the fixed pressure plate 41. Only when the worker applies a certain reverse rotational force to the buckle 46f can the pressure of the spring 46e be overcome, rotating the third and fourth shafts 46a, 46b, and moving the movable printing plate 42 away from the fixed pressure plate 41.

[0137] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A labeling machine, characterized in that, include: An unwinding roller (10) is used to place a paper roll, wherein the paper roll is wound with a paper tape, and a label paper is attached to the paper tape; a labeling assembly (40), disposed downstream of the unwinding roller (10), for removing the label paper from the paper tape so as to facilitate the label paper being adhered to an object to be labeled; A traction roller (1) is provided downstream of the unwinding roller (10) and is used to pull the paper tape to move downstream; A winding roller (20), disposed downstream of the traction roller (1) and used for winding the paper tape; A rotary drive assembly, used for driving the traction roller (1) and the winding roller (20) to rotate; An unwinding and tensioning assembly (50), the unwinding and tensioning assembly (50) comprising: a first swing roller (51) disposed on one side of the unwinding roller (10), wherein the paper tape released by the unwinding roller (10) passes around the first swing roller (51) and extends downstream; a first swing arm (52), wherein the first swing roller (51) is provided at one end of the first swing arm (52); a first rotating shaft (53), the first rotating shaft (53) being arranged at the other end of the first swing arm (52); A cam (54) is provided on the first rotating shaft (53); A second swing arm (55) is provided below the cam (54), and one end of the second swing arm (55) abuts against the cam (54); a second rotating shaft (56), the other end of the second swing arm (55) being connected to the second rotating shaft (56); A fixed wheel (57) connected to the unwinding roller (10); A fixed wheel belt (58), provided on the second swing arm (55) and used to connect to the fixed wheel (57); The unwinding and tensioning assembly (50) includes a relaxed state and a tensioned state; When the paper tape is brought along, the first swing roller (51) is pulled, and the first swing roller (51) drives the first swing arm (52) to rotate around the first rotating shaft (53). The first rotating shaft (53) rotates, causing the wheel surface of the cam (54) to rotate away from the second swing arm (55). The second swing arm (55) follows the cam (54) and rotates around the second rotating shaft (56). The fixed wheel belt (58) releases the fixed wheel (57), and the unwinding tensioning assembly (50) enters the relaxed state. The unwinding roller (10) is pulled by the paper tape and rotates to unwind. During the process of releasing the paper tape, the first swing roller (51) gradually moves away from the traction roller (1), maintaining tension on the paper tape while pre-storing the paper tape; After the unwinding roller (10) releases the paper tape, the first swing roller (51) drives the first swing arm (52) to rotate, the first rotating shaft (53) rotates, and the wheel surface of the cam (54) turns to the second swing arm (55), the second swing arm (55) is pressed down, and the fixed wheel belt (58) re-covers the fixed wheel (57), so that the fixed wheel (57) cannot rotate, and the unwinding tensioning assembly (50) enters the tensioning state, and the unwinding roller (10) no longer rotates; The unwinding and tensioning assembly (50) further comprises: a first limiting member (59a), the first limiting member (59a) being provided on a side of the first swing arm (52) away from the second swing arm (55), and when the first swing arm (52) swings in a direction away from the traction roller (1), the first swing arm (52) can abut against the first limiting member (59a); a second limiting member (59b), the second limiting member (59b) being provided on a side of the second swing arm (55) away from the first swing arm (52), and being capable of abutting against the second limiting member (59b) when the second swing arm (55) is pressed and swings downward; The third limiting member (59c) is provided on the lower side of the first swing arm (52). When the first swing arm (52) abuts against the third limiting member (59c), the unwinding tensioning assembly (50) enters a relaxed state. The first limiting member (59a) and the third limiting member (59c) cooperate to limit the swing range of the first swing arm (52).

2. The labeling machine according to claim 1, characterized in that The labeling machine further comprises a first mounting seat (61), the first mounting seat (61) being used to mount the unwinding roller (10) and the unwinding tensioning assembly (50), the unwinding roller (10), the first rotating shaft (53) and the second rotating shaft (56) being rotatably disposed in the first mounting seat (61); And / or, the unwinding and tensioning assembly (50) further includes an abutting wheel (55a), wherein the abutting wheel (55a) is provided at one end of the second swing arm (55) and is used to abut against the cam (54).

3. The labeling machine according to claim 1, characterized in that The unwinding roller (10) comprises: A first shaft seat (11) is rotatably disposed on a first mounting seat (61); A screw (12) rotatably disposed on the first shaft seat (11); A wedge-shaped block (13) threadedly connected to the screw (12); A movable block (14), wherein the wedge-shaped block (13) and the movable block (14) are provided with inclined surfaces capable of contacting each other; a sleeve (15) sleeved outside the screw rod (12) and connected to the first shaft seat (11); a limiting hole is opened on the sleeve (15); the movable block (14) is exposed to the outside through the limiting hole; The screw rod (12) is rotated, and the wedge block (13) can move axially along the screw rod (12). The wedge block (13) can push the movable block (14), so that the movable block (14) extends out of the limiting hole or is retracted into the limiting hole, so that the movable block (14) can tighten or loosen the paper roll.

4. The labeling machine according to claim 3, characterized in that: The unwinding roller (10) further comprises: A screw cap (16) is connected to the screw rod (12), and a worker can rotate the screw rod (12) by rotating the screw cap (16); and / or, an expansion block (17), which is arranged outside the sleeve (15) and connected to the movable block (14), wherein the surface of the expansion block (17) is provided with an anti-slip structure, and the expansion block (17) is used to expand the paper roll; and / or, an end limit plate (18a) provided at one end of the sleeve (15) close to the first shaft seat (11); and / or, a front end limiting plate (18b) detachably disposed on the sleeve (15); And / or, the screw (12) is a double-rotation screw, and the screw (12) is provided with two sections of threads with different rotation directions. The unwinding roller (10) includes two wedge blocks (13), and the two wedge blocks (13) are respectively connected to a section of the thread of the screw (12). Four sets of inclined guide parts are provided on any one of the wedge blocks (13), and the two wedge blocks (13) are symmetrically arranged. The unwinding roller (10) also includes four movable blocks (14), and two inclined force-bearing parts are provided on any one of the movable blocks (14). The two inclined force-bearing parts on the same movable block (14) are symmetrically arranged, and one movable block (14) can be attached to two wedge blocks (13).

5. The labeling machine according to claim 1, characterized in that It also includes a pressing assembly (70), which is arranged on one side of the traction roller (1) and is used to cooperate with the traction roller (1) to clamp the paper belt.

6. The labeling machine according to claim 5, characterized in that The pressing assembly (70) comprises: A fixed shaft (71) fixedly arranged on one side of the traction roller (1); a turntable (72) rotatably disposed on the fixed shaft (71); a pressing roller (73) rotatably disposed on the turntable (72) and configured to abut against the traction roller (1); a limiting roller (74) rotatably disposed on the turntable (72) and located on one side of the pressing roller (73), capable of cooperating with the pressing roller (73) to abut against the traction roller (1); The turntable (72) is provided with a guide hole, the guide hole extending toward the traction roller (1), an elastic member (75) is provided in the guide hole, and the shaft end of the pressing roller (73) is inserted into the guide hole and connected to the elastic member (75); The turntable (72) rotates in the forward direction, the pressing roller (73) approaches and presses against the traction roller (1), and the elastic member (75) is compressed; Along the forward rotation direction of the turntable (72), the limiting roller (74) is arranged on the rear side of the pressing roller (73), and after the limiting roller (74) and the pressing roller (73) abut against the traction roller (1), the limiting roller (74) can prevent the turntable (72) from continuing to rotate; The turntable (72) is caused to rotate in the opposite direction, the pressing roller (73) and the limiting roller (74) are moved away from the traction roller (1), and the elastic member (75) is restored.

7. The labeling machine according to claim 6, characterized in that The roller surface of the pressing roller (73) is made of metal, and the roller surface of the pressing roller (73) is engraved with an anti-slip pattern; And / or, the roller surface of the limiting roller (74) is made of rubber; And / or, a handle (76) is provided on the turntable (72), and a worker can rotate the turntable (72) by means of the handle (76); And / or, a sliding sleeve (77) is provided on the fixed shaft (71), the sliding sleeve (77) is capable of supporting the turntable (72), and the position of the sliding sleeve (77) on the fixed shaft (71) is adjustable.

8. The labeling machine according to claim 1, characterized in that The labeling machine further comprises a second mounting seat (62), wherein the second mounting seat (62) is used for mounting the winding roller (20); The winding roller (20) comprises: A second shaft seat (21) rotatably disposed in the second mounting seat (62); a reel (22), disposed on the second shaft seat (21), for winding the paper tape; a linkage wheel (23), wherein the linkage wheel (23) is provided with a first slot (a), and the linkage wheel (23) can be sleeved on an end of the second shaft seat (21) away from the winding shaft (22) through the first slot (a); a second slot (b) is further provided outside the first slot (a), and the slot diameter of the second slot (b) is larger than the slot diameter of the first slot (a); a tower-shaped torsion spring (24) disposed between the linkage wheel (23) and the second shaft seat (21); Wherein, one end of the second shaft seat (21) for connecting to the linkage wheel (23) is provided with a third slot (c), and the tower-shaped torsion spring (24) is located between the second slot (b) and the third slot (c); The rotary drive assembly is used to drive the linkage wheel (23) to rotate. When the linkage wheel (23) rotates in the forward direction, the tower-shaped torsion spring (24) expands and can tighten the second shaft seat (21), so that the linkage wheel (23) drives the winding shaft (22) to rotate. When the linkage wheel (23) rotates in the reverse direction, the tower-shaped torsion spring (24) retracts, and the linkage wheel (23) cannot drive the reeling shaft (22) to rotate.

9. The labeling machine according to claim 1, characterized in that: The labeling assembly (40) comprises: a fixed pressing plate (41) and a movable printing plate (42), wherein the paper tape passes between the fixed pressing plate (41) and the movable printing plate (42); An auxiliary guide roller (43) is provided downstream of the fixed pressing plate (41) and the movable printing plate (42) and is used for pulling the paper tape to move downstream; A direction-changing guide rod (44) is provided downstream of the auxiliary guide roller (43). The paper tape changes direction after passing through the direction-changing guide rod (44). The support portion of the direction-changing guide rod (44) for guiding the paper tape to change direction is in an acute angle shape.

10. The labeling machine according to claim 9, characterized in that The labeling assembly (40) further includes a detection member (45), which is arranged upstream of the fixed pressing plate (41) and the movable printing plate (42) and is used to detect the distance between two adjacent label papers on the paper tape; And / or, the labeling component (40) further includes: a third rotating shaft (46a), the movable printing plate (42) being arranged on the third rotating shaft (46a); a fourth rotating shaft (46b) arranged in parallel with the third rotating shaft (46a), wherein a joint (46c) is provided on each of the third rotating shaft (46a) and the fourth rotating shaft (46b), and a connecting shaft (46d) is provided between the two joints (46c), and the connecting shaft (46d) is rotatably connected to the third rotating shaft (46a) and the fourth rotating shaft (46b) respectively; A spring (46e) is sleeved on the connecting shaft (46d); A buckle (46f) connected to the fourth rotating shaft (46b); A clamping block (46g) is provided on the fixed pressing plate (41); The buckle (46f) is rotated to move the buckle (46f) toward the block (46g), and the fourth rotating shaft (46b) is rotated to drive the third rotating shaft (46a) to rotate through the joint (46c) and the connecting shaft (46d). The third rotating shaft (46a) drives the movable printing plate (42) to rotate to make the movable printing plate (42) abut against the fixed pressure plate (41). The spring (46e) is compressed and can press the third rotating shaft (46a) to fix the movable printing plate (42) and the fixed pressure plate (41).

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