Labeling machine device for U-shaped easy-to-tear label

Abstract

The utility model provides a labeling machine device for a U-shaped easy-to-tear label. The labeling machine device comprises a rack, a conveying device, a labeling device and a folding calibration device, the conveying device is used for conveying the heaven and earth boxes to be labeled; the labeling device comprises a left side labeling machine and a right side labeling machine which are arranged at the corresponding positions of the two sides of the conveying device and are respectively used for sticking easy-to-tear labels on the side surfaces of the headers; the folding calibration device comprises a side air cylinder assembly and a bottom air cylinder assembly which are arranged on the rear side of the labeling device, the side air cylinder assembly comprises two transverse air cylinders correspondingly arranged on the two sides of the conveying device, the transverse air cylinders face the heaven and earth boxes on the conveying device, and the telescopic ends of the transverse air cylinders are connected with L-shaped folding plates; the bottom air cylinder assembly comprises two vertical air cylinders correspondingly arranged on the two sides of the conveying device, the two vertical air cylinders face upwards, and the telescopic ends of the two vertical air cylinders are connected with calibration plates. According to the labeling machine device, the automatic procedure of easy-to-tear labeling U-shaped opposite labeling of lid and base box sealing can be achieved, and meanwhile the production quality and the production efficiency are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of garden greening maintenance machinery technology, specifically to a labeling machine device for U-shaped easy-tear labels. Background Technology

[0002] Labeling machines are mechanical devices that use electromechanical control mechanisms to affix or adhere labels to predetermined positions, thereby achieving packaging purposes. They significantly reduce labor costs and improve efficiency. Labeling machines were initially used primarily for labeling bottled wines. With industrialization, labeling machines have been increasingly applied to other industries, such as food and pharmaceuticals. They have evolved from manual operation to semi-automatic operation, and then to fully automatic operation. Today, high-speed, high-efficiency labeling machines have become indispensable equipment on production lines.

[0003] Currently, labeling machines on the market mainly include "manual labeling machines," "semi-automatic labeling machines," and "fully automatic labeling machines." "Fully automatic labeling machines" are further divided into several categories: flat labeling, round bottle labeling, double-sided labeling, fixed-point labeling, and horizontal roller labeling machines. While there are many types of labeling machines, all of them share a drawback: they require a high degree of curvature on the surface of the material being labeled. Although some labeling machines can label curved surfaces, they require a large surface curvature and cannot achieve small-angle "U-shaped" labeling.

[0004] To improve the quality and appearance of food, some food packaging uses a hinged box design. However, sealing these boxes often presents a headache for producers. Because the sealing area on some hinged boxes is very thin, the easy-tear label needs to be folded before application. Currently, labeling machines mainly come in two forms: flat labeling and L-shaped labeling, neither of which can handle "U-shaped" labeling, failing to meet the needs of actual production where "U-shaped" labels are required, such as for sealing hinged boxes. Therefore, the easy-tear label sealing process for hinged boxes still relies on manual sealing, which is labor-intensive, costly, and makes it difficult to simultaneously guarantee production efficiency and quality.

[0005] Therefore, it is necessary to develop a labeling machine suitable for U-shaped labels to automate the U-shaped labeling process and meet the production needs of U-shaped labels such as those for sealing top and bottom boxes. Utility Model Content

[0006] To better address the aforementioned issues, this utility model provides a labeling machine for U-shaped easy-tear labels. This labeling machine can automate the process of U-shaped application of easy-tear labels to the sealing of top and bottom boxes, while simultaneously ensuring production quality and efficiency.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A labeling machine for U-shaped easy-tear labels includes a frame and a conveying device, a labeling device, and a folding and labeling device mounted on the frame. The conveying device conveys a top and bottom box to be labeled. The labeling device includes a left labeling machine and a right labeling machine positioned on opposite sides of the conveying device, respectively used to affix easy-tear labels to the sides of the top box. The folding and labeling device includes a side cylinder assembly and a bottom cylinder assembly positioned behind the labeling device. The side cylinder assembly includes two transverse cylinders positioned on opposite sides of the conveying device, the transverse cylinders facing the top and bottom box on the conveying device, and their telescopic ends connected to an L-shaped folding plate. The bottom cylinder assembly includes two vertical cylinders positioned on opposite sides of the conveying device, the two vertical cylinders facing upwards, and their telescopic ends connected to a labeling plate.

[0009] Optionally, the L-shaped folding plate is a long strip parallel to the conveying device, with its front end connected to the telescopic end of the horizontal cylinder and a long hole on the rear bottom plate; the vertical cylinder is located below the long hole, and when the horizontal cylinder extends into position so that the L-shaped folding plate abuts against the side of the top cover, the calibration plate can extend upward from the long hole and abut against the inside of the ground box.

[0010] Optionally, it also includes a detection mechanism and a control device. The detection mechanism includes a first position sensor, which is set at the labeling station at the front end of the left and right labeling machines. The control device is electrically connected to the left and right labeling machines and the first position sensor respectively. When the first position sensor detects that the top and bottom boxes on the conveyor belt have arrived at the labeling station, the control device sends an action command to the left and right labeling machines, and the left and right labeling machines affix the upper half of the easy-tear label to the side of the top box.

[0011] Optionally, the testing mechanism also includes a second position sensor, which is set at the folding calibration station at the front end of the horizontal cylinder; the control device is also electrically connected to the horizontal cylinder, the vertical cylinder and the second position sensor respectively. When the second position sensor detects that the top and bottom boxes on the conveyor belt have reached the folding calibration station, the control device sends action commands to the horizontal cylinder and the vertical cylinder in sequence. The horizontal cylinder extends to fold the lower half of the easy-tear label by 90° with the L-shaped folding plate, and the vertical cylinder extends to fold the lower half of the easy-tear label by 90° with the calibration plate and stick it to the inside of the bottom box.

[0012] Optionally, the first position sensor and the second position sensor are photoelectric sensors.

[0013] Optionally, the labeling machine on the left and the labeling machine on the right are flat labeling machines.

[0014] Optionally, the conveying device includes a conveyor belt, the width of which is less than the width of the junction box, and the two side edges of the junction box protrude beyond the two side edges of the conveyor belt.

[0015] Optionally, the conveying device also includes a limiting component, which includes a limiting roller disposed above the conveyor belt and located above the vertical cylinder, for abutting the top and bottom boxes when the vertical cylinder extends.

[0016] Optionally, it also includes a landmark labeling machine, wherein the conveying device is provided with a landmark station located in front of the labeling device, and the landmark labeling machine is located below the conveying device with its working end located below the landmark station, for affixing landmark labels to the bottom surface of the ground box.

[0017] The labeling machine device for U-shaped easy-tear labels of this utility model embodiment, by sequentially arranging left and right labeling machines, a horizontal cylinder, and a vertical cylinder in the conveying direction of the conveying device, can first use the left and right labeling machines to paste the upper half of the easy-tear label onto the side of the top cover ... bottom cover of the top cover of the top cover of the top cover of the top cover of the bottom cover of the top cover of the top cover of the top cover of the top cover of the bottom cover of the top cover of the top cover of the top cover of the bottom cover of the top cover of the top cover of the top cover of the bottom cover of the top cover of the top cover of the bottom cover of the top cover of the top cover of the bottom cover of the top cover of the top cover of the bottom cover of the top cover of the top cover of the bottom cover of the top cover of the top cover of the bottom cover of the top cover of the bottom cover of the top cover of the top cover of the bottom cover of the top cover of the bottom cover of the top cover of the bottom cover of the top cover of the bottom cover of the top cover of the bottom cover of the top cover of the bottom cover of the top cover of the bottom cover of the top cover of the bottom cover of the top cover of the bottom cover of the top cover of the bottom cover of the top cover of the bottom cover of the top cover of

[0018] This labeling machine has the advantages of simple structure and reliable performance. It can meet the process requirements of U-shaped sealing in the production of top and bottom boxes. Compared with the manual sealing method of U-shaped sealing, it can realize the automated production of U-shaped labeling, ensure the label pasting quality, improve production efficiency, and reduce labor costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front view of the labeling machine device according to an embodiment of the present utility model;

[0021] Figure 2 This is a side view of the labeling machine device according to an embodiment of the present invention;

[0022] Figure 3 This is a top view of the labeling machine device according to an embodiment of the present invention.

[0023] Figure label:

[0024] 1. Touch screen; 2. Conveyor belt; 3. Vertical cylinder; 4. Horizontal cylinder; 5. First position sensor; 6. Landmark labeling machine; 7. Right side labeling machine; 8. Left side labeling machine; 9. Electrical control box; 10. Second position sensor; 11. Limit roller; 12. Top and bottom box products. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the implementations of the base model disclosed below.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] like Figure 1-3 As shown in the figure, an embodiment of the present invention provides a labeling machine device for U-shaped easy-tear labels, including a frame and a conveying device, a labeling device, and a folding and labeling device mounted on the frame. The conveying device is used to convey the top and bottom box product 12 to be labeled. The labeling device includes a left labeling machine 8 and a right labeling machine 7 mounted on corresponding positions on both sides of the conveying device, respectively used to affix easy-tear labels to the left and right sides of the top box. The folding and labeling device includes a side cylinder assembly and a bottom cylinder assembly mounted on the rear side of the labeling device. The side cylinder assembly includes two horizontal cylinders 4 mounted on both sides of the conveying device, with the horizontal cylinders 4 facing the top and bottom box product 12 on the conveying device, and their telescopic ends connected to an L-shaped folding plate. The bottom cylinder assembly includes two vertical cylinders 3 mounted on both sides of the conveying device, with the two vertical cylinders 3 facing upwards, and their telescopic ends connected to a labeling plate.

[0028] In this embodiment, the top and bottom box product includes a top cover and a bottom box. The top cover is placed on the bottom box, which has a product slot for holding the product. The bottom edge of the bottom box has a groove (formed by the outer wall of the product slot and the side of the bottom box), such as the top and bottom box packaging used for large mooncakes. The sealing method used for this top and bottom box is to affix an easy-tear label to the edge where the top cover and the bottom box meet. This sealing method requires folding the easy-tear label in half before affixing it, i.e., a U-shaped affixing method. The labeling machine device used in this embodiment can perform labeling operations efficiently.

[0029] In this labeling machine, the conveying device includes a conveyor belt 2 and a drive mechanism. The drive mechanism drives the conveyor belt 2 to run. The width of the conveyor belt 2 is smaller than the width of the top and bottom boxes. The top and bottom boxes are placed on the conveyor belt 2, with their two side edges protruding beyond the edges of the conveyor belt. This ensures that the grooves at the sides of the top and bottom boxes are located outside the conveyor belt, facilitating the U-shaped application of easy-tear labels. In the production of the top and bottom boxes, the previous process outputs the top and bottom boxes to the front end of the conveyor belt 2. The labeling stations are located at the front ends (working ends) of the left and right labeling machines on both sides of the conveyor belt 2, while the folding and labeling stations are located at the horizontal cylinder 4 and vertical cylinder 3 on both sides of the conveyor belt 2.

[0030] The left and right labeling machines of the labeling device can be relatively mature flat labeling machines in the existing technology. They use flat labeling to affix the upper half of the easy-tear label to the side of the top cover of the conveyor box. The two labeling machines are symmetrically arranged on both sides of the conveyor belt 2, and their front ends are at the same height as the top cover conveyed on the conveyor belt 2, so that the two labeling machines can perform standard labeling operations synchronously.

[0031] The horizontal cylinder 4 and vertical cylinder 3 of the folding calibration device are positioned behind the left and right labeling machines along the conveyor belt 2, with the vertical cylinder 3 located behind the horizontal cylinder 4. The two horizontal cylinders 4 are symmetrically positioned on both sides of the conveyor belt 2 at the front of the folding calibration station. The height of the bottom plate of the L-shaped folding plate connected to the telescopic end is consistent with the height of the lower edge of the top and bottom boxes on the conveyor belt 2. By controlling the two horizontal cylinders 4 to extend synchronously into the top and bottom boxes on the conveyor belt 2, the lower half of the easy-tear label pasted on the side of the top cover can be folded inward by 90° using the L-shaped folding plate. The two vertical cylinders 3 are symmetrically positioned on both sides of the conveyor belt at the rear of the folding calibration station. The vertically positioned calibration plate connected to the telescopic end is located below the edge of the top and bottom boxes on the conveyor belt. The outer side of the calibration plate corresponds to the outer wall of the bottom groove of the top and bottom boxes. By controlling the two vertical cylinders 3 to extend synchronously upward, the calibration plate pushes the lower half of the easy-tear label, which has been folded once, to fold again by 90° and paste it onto the inner side of the bottom groove of the bottom box.

[0032] When this labeling machine performs U-shaped labeling on the top and bottom boxes, the conveying device transports the boxes to be labeled from front to back, and the easy-tear labels are applied in a U-shape during the transport process. The top and bottom boxes are first transported to the labeling station, where the left and right labeling machines apply the upper half of the easy-tear label to the side of the top cover. The boxes are then transported to the folding and labeling station, where the horizontal cylinder 4 extends, driving the L-shaped folding plate towards the easy-tear label, folding the lower half of the label inwards by 90°. Then, the vertical cylinder 3 extends, driving the labeling plate out, folding the label again by 90° and applying it to the inside edge of the bottom box.

[0033] In one optional embodiment, the L-shaped folding plate is a long strip parallel to the conveyor belt, with its front end connected to the telescopic end of the horizontal cylinder 4, and its rear end extending rearward along the conveying direction of the conveyor belt 2, remaining suspended. The bottom plate of the L-shaped folding plate has a long slot, or the rear bottom plate has a long slot, so that the suspended rear bottom plate has a long slot. Furthermore, the vertical cylinder 3 is positioned below the long slot. When the horizontal cylinder 4 extends to its position so that the L-shaped folding plate abuts against the side of the top cover, the calibration plate is located directly below the long slot. When the vertical cylinder 3 extends, the calibration plate can extend upward from the long slot and abut against the inside of the junction box. During the folding and calibration operation, the horizontal cylinder 4 extends first, and the bottom plate of the L-shaped folding plate gradually pushes the label inward to fold 90°. When the horizontal cylinder 4 is fully extended, the L-shaped folding plate abuts against the side and bottom surfaces of the top and bottom boxes. The side plates and bottom plates abut against the upper and lower halves of the folded label, respectively, with the label protruding from the elongated hole in the bottom plate. The top and bottom boxes continue to move backward, while the vertical cylinder 3 extends, and the calibration plate gradually extends upward from the elongated hole, causing the label to fold again to 90° (the vertical cylinder is fully extended). Then, the vertical cylinder 3 retracts first, and after the calibration plate exits the elongated hole, the horizontal cylinder 4 retracts as well.

[0034] Optionally, the conveying device also includes a limiting component, which includes a limiting roller 11 disposed above the conveyor belt 2 and above the vertical cylinder 3, for abutting the top and bottom boxes when the vertical cylinder 3 extends. The limiting roller 11 can be installed by a mounting bracket, and the distance between the limiting roller 11 and the conveyor belt 2 is adapted to the height of the top and bottom boxes to be labeled. On the one hand, this allows the top and bottom boxes to be conveyed below the roller; on the other hand, the roller abutting the top and bottom boxes from above can stabilize the top and bottom boxes, preventing the upwardly extending calibration plate from affecting the stable conveying of the top and bottom boxes, and allowing the calibration plate to stably push the label to fold again when it extends.

[0035] In this embodiment, the labeling machine device further includes a detection mechanism and a control device. The detection mechanism includes a first position sensor 5, which is set at the labeling station at the front end of the left and right labeling machines to detect whether the top and bottom boxes on the conveyor belt 2 have been conveyed to the labeling station. The control device is electrically connected to the left and right labeling machines and the first position sensor 5 respectively. When the first position sensor detects that the top and bottom boxes on the conveyor belt have arrived at the labeling station, the control device sends an action command to the left and right labeling machines. The left and right labeling machines perform a planar labeling action, pasting the upper half of the easy-tear label onto the side of the top cover. Furthermore, the detection mechanism also includes a second position sensor 10, located at the folding calibration station at the front end of the horizontal cylinder 4, used to detect whether the top and bottom boxes on the conveyor belt have been conveyed to the folding calibration station. The control device is also electrically connected to the horizontal cylinder 4, the vertical cylinder 3, and the second position sensor 10 respectively. When the second position sensor detects that the top and bottom boxes on the conveyor belt have arrived at the folding calibration station, the control device sends action commands to the horizontal cylinder and the vertical cylinder in sequence. The horizontal cylinder extends to fold the lower half of the easy-tear label by 90° using the L-shaped folding plate, and the vertical cylinder extends to fold the lower half of the easy-tear label by 90° using the calibration plate, affixing it to the inside of the bottom box. The first position sensor 5 and the second position sensor 10 can be non-contact photoelectric sensors.

[0036] In practical applications, the specific installation location of the first position sensor is related to the sensor's response speed, the conveyor belt's conveying speed, and the response speed of the left and right labeling machines performing the labeling action. For example, if installed at the front end of the labeling station, the response time from when the first position sensor detects the incoming top and bottom boxes (when the top and bottom boxes begin to enter the labeling station) to when the left and right labeling machines perform the labeling action matches the conveying time from when the top and bottom boxes begin to enter the labeling station to when they are fully inside. Similarly, the specific installation location of the second position sensor is related to the sensor's response speed, the conveyor belt's conveying speed, and the extension and positioning time of the horizontal and vertical cylinders. For example, if installed at the front end of the folding and calibration station, the response time from when the second position sensor detects the incoming top and bottom boxes (when the top and bottom boxes begin to enter the folding and calibration station) to when the horizontal cylinder extends to its position matches the conveying time from when the top and bottom boxes begin to enter the folding and calibration station to when they are conveyed to the front of the horizontal cylinder; the further conveying time of the top and bottom boxes to the top of the vertical cylinder corresponds to the response time of the vertical cylinder extending to its position.

[0037] In this embodiment of the invention, the labeling machine further includes a landmark labeling machine 6. A landmark station is located on the conveyor belt 2 at the front of the labeling device. The landmark labeling machine 6 is positioned below the landmark station on the conveyor belt 2, with its working end located below the landmark station. Here, the conveyor belt 2 comprises two separate sections, each equipped with a drive mechanism, capable of independent operation and traveling in the same direction. Together, they form the conveyor belt of the labeling machine. A certain distance is spaced between the two sections at their junction, forming the landmark station. The top and bottom boxes can be conveyed from the front conveyor belt through the landmark station to the rear conveyor belt. The working end of the landmark labeling machine extends upwards from this space, affixing landmark labels to the bottom surface of the top and bottom boxes passing the landmark station on the conveyor belt. Alternatively, the landmark labeling machine 6 can be a flat labeling machine, also equipped with a position sensor. When it detects that the top and bottom boxes have been conveyed to the landmark station, the landmark labeling machine 6 affixes the landmark label to the bottom surface of the top and bottom boxes.

[0038] In practical application scenarios, the labeling machines (left labeling machine 8, right labeling machine 7, and ground labeling machine 6), conveying devices, cylinders (horizontal and vertical), position sensors, control devices, etc. in the labeling machine device of this utility model embodiment can all adopt existing equipment or electrical components with corresponding functions and meeting process requirements. Components such as L-shaped folding plates, labeling plates, and limiting rollers 11 can all be made of relevant materials in the existing technology according to the process requirements, size and shape requirements in the actual working conditions.

[0039] Furthermore, the labeling machine can also be equipped with other devices or components, or the actual installation positions of each device or component can be adjusted to achieve the actual application or other functions of the labeling machine. For example, the control device may include an electrical control box 9 and a touch screen 1. The electrical control box 9 can be located below the conveyor belt 2, and can be equipped with the drive devices for the left and right labeling machines and cylinders. The electrical control box 9 can also serve as a support device for installing the left and right labeling machines or cylinders. The touch screen 1 can be mounted on the upper side of one side of the conveyor belt 2 via a bracket, making it convenient for users to control the start and stop of the device and set relevant process parameters.

[0040] According to an exemplary embodiment of the present invention, the process of using a labeling machine to perform a U-shaped labeling operation on a top and bottom box for easy-tear labeling may include the following steps:

[0041] 1. Preparation: Check in advance whether all components in the device are normal, including whether the conveying device, left and right side labeling machines and ground labeling machine 6 are working properly, whether the horizontal cylinder 4 and vertical cylinder 3 extend and retract normally, and whether the sensors are sensitive, etc.

[0042] 2. Transmission Steps: The Heaven and Earth Box is transmitted (or placed) onto Conveyor Belt 2, which then transmits the Heaven and Earth Box backward.

[0043] 3. Landmark labeling process: During the transfer of the top and bottom box, the top and bottom box is first transferred to the landmark station, where the landmark labeling machine 6 affixes the landmark label to the bottom surface, and then the top and bottom box continues to be transferred.

[0044] 4. U-shaped labeling step: When the first position sensor 5 detects that the top and bottom box has been conveyed to the labeling station, the upper half of the easy-tear label on the left and right side labeling machines 7 is pasted onto the left and right sides of the top cover; the top and bottom box continues to be conveyed, and when the second position sensor 10 detects that the top and bottom box has been conveyed to the folding and labeling station, the horizontal cylinder 4 first extends to its position to fold the lower half of the easy-tear label 90°, and the vertical cylinder 3 then extends to fold the lower half of the easy-tear label 90° again, thus achieving the U-shaped pasting of the easy-tear label. The vertical cylinder 3 and the horizontal cylinder 4 then retract sequentially.

[0045] 5. Continuous operation: Conveyor belt 2 continuously transports the top and bottom boxes, while the labeling machine 6 and the left and right side labeling machines cycle through the labeling action. Horizontal cylinder 4 and vertical cylinder 3 cycle through the folding and labeling action, continuously performing the U-shaped labeling application on the top and bottom boxes. After the operation is completed, the equipment is inspected and maintained.

[0046] It should be noted that, depending on the implementation needs, the various components described in the embodiments of this utility model can be split into more components, or two or more components or parts of components can be combined into new components to achieve the purpose of the embodiments of this utility model.

[0047] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A labelling machine arrangement for U-shaped tear-off labels, characterized in that The machine frame and the conveying device, the labeling device and the folding and labeling device arranged on the machine frame; The conveying device is used for conveying the top and bottom boxes to be labeled; The labeling device comprises a left labeling machine and a right labeling machine arranged at corresponding positions on both sides of the conveying device, and is used for pasting the tearable label on the side of the top cover respectively; The folding and labeling device comprises a side cylinder assembly and a bottom cylinder assembly arranged at the rear side of the labeling device, the side cylinder assembly comprises two horizontal cylinders arranged at both sides of the conveying device respectively, the horizontal cylinders face the top and bottom boxes on the conveying device, and the telescopic end is connected with an L-shaped folding plate; the bottom cylinder assembly comprises two vertical cylinders arranged at both sides of the conveying device respectively, the two vertical cylinders face upward, and the telescopic end is connected with a labeling plate.

2. A labelling machine arrangement for U-shaped tearable labels according to claim 1, characterized in that The L-shaped folding plate is a long strip parallel to the conveying device, the front end is connected to the telescopic end of the horizontal cylinder, and the bottom plate at the rear part has a long hole; the vertical cylinder is arranged below the long hole, and when the horizontal cylinder is extended to the position and the L-shaped folding plate abuts against the side of the top cover, the labeling plate can be extended upward from the long hole to abut against the inner side of the bottom box.

3. A labelling machine arrangement for U-shaped tearable labels according to claim 1, characterized in that The detection mechanism comprises a first position sensor arranged at the labeling station at the front end of the left and right labeling machines; the control device is electrically connected with the left and right labeling machines and the first position sensor respectively, when the first position sensor detects that the top and bottom box on the conveying belt reaches the labeling station, the control device sends an action instruction to the left and right labeling machines, and the left and right labeling machines paste the upper half of the tearable label on the side of the top cover.

4. A labelling machine arrangement for U-shaped tear-off labels according to claim 3, characterised in that The detection mechanism further comprises a second position sensor arranged at the folding and labeling station at the front end of the horizontal cylinder; the control device is further electrically connected with the horizontal cylinder, the vertical cylinder and the second position sensor respectively, when the second position sensor detects that the top and bottom box on the conveying belt reaches the folding and labeling station, the control device sends an action instruction to the horizontal cylinder and the vertical cylinder in sequence, the horizontal cylinder is extended to make the L-shaped folding plate fold the lower half of the tearable label by 90°, and the vertical cylinder is further extended to make the labeling plate fold the lower half of the tearable label by 90° and paste it on the inner side of the bottom box.

5. A labelling machine arrangement for U-shaped tear-off labels according to claim 4, characterised in that The first position sensor and the second position sensor are photoelectric sensors.

6. A labelling machine arrangement for U-shaped tearable labels according to claim 1, characterized in that The left and right labeling machines are planar labeling machines.

7. A labeling machine apparatus for U-shaped tearable labels according to claim 1, characterized in that, The conveying device comprises a conveying belt, the width of the conveying belt is smaller than the width of the top and bottom box, and the two side edges of the top and bottom box protrude from the two side edges of the conveying belt.

8. A labelling machine arrangement for U-shaped tearable labels according to claim 7, characterized in that The conveying device further comprises a limiting assembly, the limiting assembly comprises a limiting roller arranged above the conveying belt and located above the vertical cylinder, and is used for abutting against the top and bottom box when the vertical cylinder is extended.

9. A labelling machine arrangement for U-shaped tear-off labels according to any of claims 1 - 8, characterized in that The conveying device is further provided with a ground label labeling station at the front side of the labeling device, the ground label labeling machine is arranged below the conveying device and the working end is located below the ground label labeling station, and is used for pasting the ground label on the bottom surface of the bottom box.

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