Special-shaped packaging box labeling machine

Abstract

The utility model relates to a special-shaped packaging box labeling machine, which belongs to the field of labeling and comprises a first main conveying belt and a second main conveying belt, two first side conveying belts with opposite conveying surfaces are arranged on two sides above the first main conveying belt, a first feeding conveying belt with a downward conveying surface is arranged above the front end of each first side conveying belt, and a second feeding conveying belt with a downward conveying surface is arranged above the front end of each second main conveying belt. The first feeding conveying belt is used for conveying a packaging box in a lodging state into the position between the two first side conveying belts in an auxiliary mode, a first label discharging mechanism for outputting dovetail labels is arranged behind the first feeding conveying belt, and the first label discharging mechanism and the two first side conveying belts are matched to attach label heads of the dovetail labels to the front top face of the packaging box. A first label smoothing mechanism is arranged behind the first label discharging mechanism so that two label tails of the dovetail labels can be attached to the side faces of the packaging boxes, and a second label smoothing mechanism is arranged above the second main conveying belt so that the tail ends of the two label tails can be attached to the bottom faces of the packaging boxes. According to the labeling machine, automatic high-quality labeling operation is achieved for special-shaped packaging boxes.

Description

Technical Field

[0001] The utility model relates to the field of labeling, in particular to a labeling machine for special-shaped packaging boxes. Background Art

[0002] The Angong Niuhuang Pills product is packaged in a brocade box, which is a hexagonal special-shaped box in the form of a lid-and-bottom box. A special-shaped swallowtail label and a bottom label are pasted on the outside of the box body. The former needs to be pasted on the surface of the box body on multiple sides, and it is required not to be skewed or wrinkled; although the latter is a flat label, due to the use of a hexagon matching the brocade box, the accuracy of the labeling position is required to be relatively high.

[0003] At present, the two labels are still pasted manually. First, the swallowtail label is pasted and then the bottom label is pasted. Manual labeling not only has low efficiency, but also is prone to errors. More importantly, the labeling quality is difficult to guarantee. With the planned construction of the digital factory for pills in the company, the output of the front-end pill preparations has increased exponentially. It is imperative to realize automated packaging for this box type, and corresponding automated labeling operations are also imperative. However, the existing labeling machines cannot be well applied to the labeling operations of the above special-shaped packaging boxes and need to be improved urgently. Content of the Utility Model

[0004] The utility model aims to make up for the deficiencies of the prior art and provides a labeling machine for special-shaped packaging boxes to at least solve or alleviate one technical problem existing in the prior art.

[0005] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0006] A labeling machine for special-shaped packaging boxes includes a first main conveyor belt and a second main conveyor belt arranged in sequence along the labeling direction. Two first side conveyor belts are arranged on both sides above the first main conveyor belt, and the conveying surfaces of the two first side conveyor belts are arranged opposite to each other for limiting and conveying the packaging boxes. Above the front ends of the two first side conveyor belts, a first feeding conveyor belt with a downward conveying surface is arranged for assisting in feeding the packaging boxes in a fallen state between the two first side conveyor belts. Behind the first feeding conveyor belt, a first label output mechanism for vertically outputting the swallowtail label is arranged. The first label output mechanism and the two first side conveyor belts cooperate to paste the label head of the swallowtail label on the front top surface of the packaging box. Behind the first label output mechanism, a first label smoothing mechanism is arranged to make the two label tails of the swallowtail label fit the side surface of the packaging box. A second label smoothing mechanism is arranged on the second main conveyor belt to make the ends of the two label tails fit the bottom surface of the packaging box.

[0007] In one example, the second main conveyor belt is offset and lower than the first main conveyor belt, or a robot is set between the two, so that the packaging box can be flipped ninety degrees from the first main conveyor belt to the second main conveyor belt with the bottom facing up, and two second side conveyor belts are also provided behind the second label-attaching mechanism, and a second feeding conveyor belt is provided at the upper front end of the two second side conveyor belts, and a second label output mechanism for horizontally outputting the bottom label is provided behind the second feeding conveyor belt, and the second label output mechanism and the two second side conveyor belts can cooperate to affix the bottom label to the bottom surface of the packaging box.

[0008] Furthermore, the conveying direction of the first main conveyor belt is perpendicular to the conveying direction of the second main conveyor belt, so as to more stably transfer the packaging boxes when the two are staggered.

[0009] In one example, in order to achieve more accurate labeling, a first detector is provided between the first feeding conveyor belt and the first label outputting mechanism, so that the first label outputting mechanism outputs a dovetail label after the first label outputting mechanism detects the packaging box; a second detector is provided in front of the second label outputting mechanism, so that the second label outputting mechanism works after the second label outputting mechanism detects the packaging box; a third detector is provided between the second feeding conveyor belt and the second label outputting mechanism, so that the second label outputting mechanism outputs a bottom label after the third detector detects the packaging box.

[0010] In one example, a spacing mechanism is further provided in front of the first side conveyor belt, and the spacing mechanism includes a clamping assembly and a blocking assembly spaced apart along the conveying direction, and a spacing d1 between the two is smaller than the length of a single packaging box in a fallen state, and a fourth detector is further provided on the side between the clamping assembly and the blocking assembly, and a fifth detector is provided on the front side of the conveying of the clamping assembly, and a spacing d2 between the fifth detector and the blocking assembly is larger than the length of multiple packaging boxes, so that when the length of the packaging boxes stacked in front of the blocking assembly is greater than d2, the materials are discharged at regular intervals, and the materials continue to be stacked when the length is less than d2.

[0011] In one example, the clamping assembly includes two clamping parts, which are driven by a first driving member to clamp or release the packaging box; the blocking assembly includes two blocking parts, which are driven by a second driving member to retain or allow the packaging box to pass.

[0012] In one example, the first label stroking mechanism includes two first brushes, which are arranged in cooperation with two side surfaces of the packaging box so as to brush the raised label tail against the side surface of the packaging box conveyed along the first main conveyor belt.

[0013] In one example, a first discharge conveyor belt with a conveying surface facing downward is provided above the two first brushes, so that the packaging box can be stably conveyed backward from between the two first side conveyor belts.

[0014] In one example, the second label pressing mechanism includes two positioning components and two second brushes. The two positioning components are driven by a first telescopic cylinder to clamp or release the packaging box, and the two second brushes are driven by a second telescopic cylinder to make the tail end of the label tail fit the bottom surface of the packaging box in the clamped state.

[0015] In one example, a second discharge conveyor belt with a downward-facing conveying surface is further provided above the rear of the second side conveyor belt.

[0016] In one example, an adjusting assembly is provided at the bottom of the first side conveyor belt and / or the second side conveyor belt to adjust the distance between the two first side conveyor belts or the two second side conveyor belts through it; the adjusting assembly includes a fixed seat and an adjusting seat. The adjusting seat is fixed to the first side conveyor belt or the second side conveyor belt, the fixed seat is fixed relative to the first main conveyor belt or the second main conveyor belt, the adjusting seat is slidably disposed on the fixed seat, and an adjusting lead screw is connected between the fixed seat and the adjusting seat. The operating end of the adjusting lead screw is connected with a handwheel.

[0017] The advantages of the present utility model adopting the above structure are as follows:

[0018] 1. For special-shaped packaging boxes, high-quality automatic label pasting operation of the swallowtail label is realized. Specifically, through the cooperation of the first main conveyor belt, the first side conveyor belt, and the first feeding conveyor belt, the packaging box can be positioned and conveyed, and then it is convenient to cooperate with the first label output mechanism and the second label pressing mechanism to accurately realize the preliminary label pasting operation of the swallowtail label; through the cooperation of the first main conveyor belt, the second main conveyor belt, and the second label pressing mechanism, the label pasting operation of the swallowtail label is finally realized with high quality.

[0019] 2. For special-shaped packaging boxes, high-quality automatic label pasting operation of the bottom label is realized. Specifically, through the misaligned cooperation of the second main conveyor belt and the first main conveyor belt, and the cooperation with structures such as the second side conveyor belt, the second feeding conveyor belt, and the second label output mechanism, the bottom label pasting operation can be completed with low cost and high quality.

[0020] 3. During the label pasting process, the setting of the first discharge conveyor belt and the second discharge conveyor belt can stably output the packaging box between the two first side conveyor belts or between the two second side conveyor belts.

[0021] 4. Through the setting of the adjusting assembly, the distance between the side conveyor belts can be adjusted according to the actual needs of the packaging box to expand the application range of the label pasting machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of one embodiment of the present utility model;

[0023] Figure 2 is Figure 1 the enlarged structural schematic diagram of part A in

[0024] Figure 3 is Figure 1 Schematic diagram of the enlarged structure of part B in

[0025] Figure 4 is Figure 1 Schematic diagram of the structure from another angle;

[0026] Figure 5 is Figure 4 Schematic diagram of the structure from another angle;

[0027] Figure 6 is Figure 5 Schematic diagram of the enlarged structure of part C in

[0028] Figure 7 is Figure 5 Schematic diagram of the enlarged structure of part D in

[0029] Figure 8 is the schematic diagram of the dovetail mark.

[0030] In the figure, 1. First main conveyor belt, 2. Second main conveyor belt, 3. First side conveyor belt, 4. Packaging box, 5. First feeding conveyor belt, 6. First label discharging mechanism, 7. First label smoothing mechanism, 8. Second label smoothing mechanism, 9. Second side conveyor belt, 10. Second feeding conveyor belt, 11. Second label discharging mechanism, 12. First discharging conveyor belt, 13. Second discharging conveyor belt, 14. First detector, 15. Second detector, 16. Third detector, 17. Spacing mechanism, 18. Adjusting assembly;

[0031] 701. First brush, 801. Positioning part, 802. Second brush, 803. First telescopic cylinder, 804. Second telescopic cylinder, 1301. Feeding rod, 1302. Driving part, 1701. Clamping assembly, 1702. Material blocking assembly, 1703. Fourth detector, 1704. Fifth detector, 1801. Fixed seat, 1802. Adjusting seat, 1803. Adjusting lead screw, 1804. Hand wheel. Specific implementation mode

[0032] To clearly illustrate the technical features of this solution, the following will elaborate on the present utility model in detail through specific embodiments and in conjunction with its accompanying drawings. In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0033] As Figures 1-5 shown, in this embodiment, the special-shaped packaging box labeling machine includes a first main conveyor belt 1 and a second main conveyor belt 2 arranged in sequence along the labeling direction. On both sides above the first main conveyor belt 1, there are two first side conveyor belts 3. The conveying surfaces of the two first side conveyor belts 3 are arranged opposite to each other for limiting the conveyance of the packaging box 4. Above the front ends of the two first side conveyor belts 3, there is a first feeding conveyor belt 5 with a downward-facing conveying surface for assisting in feeding the toppled packaging box 4 between the two first side conveyor belts 3. Behind the first feeding conveyor belt 5, there is a first label output mechanism 6 for outputting the swallowtail label. The first label output mechanism 6 and the two first side conveyor belts 3 cooperate to attach the label head of the swallowtail label to the front top surface of the packaging box 4. Behind the first label output mechanism 6, there is a first label smoothing mechanism 7 to make the two label tails of the swallowtail label fit the side surface of the packaging box. Above the second main conveyor belt 2, there is a second label smoothing mechanism 8 to make the ends of the two label tails fit the bottom surface of the packaging box 4, thus realizing the automatic and high-quality pasting of the swallowtail label on the packaging box. When this labeling machine is only used for pasting the swallowtail label, the first main conveyor belt 1 and the second main conveyor belt 2 can be integrated.

[0034] Furthermore, in order to paste the bottom label on the special-shaped packaging box, as Figure 4 shown, the second main conveyor belt 2 can be set at a position lower than the first main conveyor belt 1 in a staggered manner, or a manipulator can be arranged between the two to enable the packaging box to be flipped 90 degrees from the first main conveyor belt 1 to have its bottom surface facing up on the second main conveyor belt 2. Behind the second label smoothing mechanism 8, there are also two second side conveyor belts 9. Above the front ends of the two second side conveyor belts 9, there is a second feeding conveyor belt 10. Behind the second feeding conveyor belt 10, there is a second label output mechanism 11 for horizontally outputting the bottom label. The second label output mechanism 11 and the two second side conveyor belts 9 cooperate to paste the bottom label on the bottom surface of the packaging box.

[0035] Working process 1: Pasting the swallowtail label on the packaging box

[0036] When the packaging box 4 is conveyed backward by the first main conveyor belt 1 in a lying state with the top surface facing forward, the packaging box 4 first contacts with the first feed conveyor belt 5 to realize the positioning of the top of the packaging box. Then, as it is conveyed backward, the packaging box will smoothly enter between the two first side conveyor belts 3 to accurately position the packaging box; as the packaging box continues to be conveyed backward, the first label output mechanism 6 will cooperate to output the dovetail label, so that the packaging box can contact and adhere to the label head of the dovetail label when passing through this place. At this time, the hexagonal label head of the dovetail label is completely attached to the front top surface of the packaging box, and the label tail is still tilted upward on both sides; next, when the packaging box passes through the first label control mechanism 7, the tilted label tail will be acted on to make it fit the side of the packaging box. After the initial labeling operation is completed, the packaging box is gradually sent out from between the two first side conveyor belts 3; when the packaging box is conveyed to the end of the first main conveyor belt 1, it will be transferred to the second main conveyor belt 2. If the bottom label is to be pasted subsequently, the state of the packaging box will change after the transfer. By staggering the first main conveyor belt 1 and the second main conveyor belt 2, the packaging box can be changed from a lying state with the top surface facing forward to a state with the bottom surface facing upward. The method of staggering the two main conveyor belts is relatively low in cost. Afterwards, when the packaging box is conveyed with the second main conveyor belt 2 through the second label-applying mechanism, the tail ends of the two label tails will be acted on to make them fit the bottom surface of the packaging box, thereby completing the labeling operation of the dovetail label. The specific pattern of the dovetail label is shown in FIG. Figure 8 .

[0037] Work process 2: Paste the bottom label on the packaging box

[0038] As the packaging box continues to be transported backward with the second main conveyor belt 2, the packaging box will enter between the two second side conveyor belts 9 under the action of the second feed conveyor belt 10. When passing through the second label output mechanism 11, the bottom label will be accurately pasted on the bottom surface of the packaging box, thereby completing the bottom label labeling operation of the packaging box.

[0039] It should be noted that when the labeling machine is actually used, a corresponding programmable controller and other structures will be configured to ensure the smooth completion of the above process.

[0040] The first labeling mechanism and the second labeling mechanism of the labeling machine of the present application have similar structures to the labeling structures of existing labeling machines on the market, and both use multiple guide rollers, a labeling frame and a labeling roller thereon to achieve the output of the labels to be attached. The difference between the first labeling mechanism and the second labeling mechanism is that the labeling directions are different. The first labeling mechanism is vertical, and the second labeling mechanism is horizontal. Figure 5 shown.

[0041] In one specific embodiment, Figure 5As shown in the figure, in order to achieve more accurate labeling, a first detector 14 is further provided between the first feeding conveyor belt 5 and the first label output mechanism 6, so that the first label output mechanism 6 outputs a dovetail label after it detects the packaging box; a second detector 15 is further provided in front of the second label flattening mechanism 8, so that the second label flattening mechanism 8 operates after it detects the packaging box; a third detector 16 is provided between the second feeding conveyor belt 10 and the second label output mechanism 11, so that the second label output mechanism 11 outputs a bottom label after it detects the packaging box. Among them, the first detector, the second detector and the third detector can all adopt existing laser detectors.

[0042] In one specific embodiment, as Figure 5 and 7 shown, the labeling machine further includes a spacing mechanism for spacing the packaging boxes so that they can be released one by one into the labeling process. Specifically, a spacing mechanism 17 is provided in front of the first side conveyor belt 3. The spacing mechanism 17 includes a clamping component 1701 and a blocking component 1702 arranged at intervals along the conveying direction. The set spacing d1 between the two is smaller than the length of a single packaging box 4 in the fallen state. A fourth detector 1703 is further provided on the side between the clamping component 1701 and the blocking component 1702. A fifth detector 1704 is provided on one side in front of the conveying direction of the clamping component 1701. The set spacing d2 between the fifth detector 1704 and the blocking component 1702 is greater than the length of multiple packaging boxes. After the length of the packaging boxes stacked in front of the blocking component 1702 is greater than d2, the materials are discharged at regular intervals, and when it is less than d2, they continue to be stacked. The number of stacked packaging boxes can be set according to actual needs.

[0043] Among them, the clamping component 1701 includes two clamping parts, and the two clamping parts are driven by a first driving part to clamp or release the packaging box. The first driving part can, but is not limited to, adopt a telescopic cylinder to achieve the above functions; the blocking component 1702 includes two blocking parts, and the two blocking parts are driven by a second driving part to retain or allow the passage of the packaging box. The second driving part can, but is not limited to, adopt a telescopic cylinder to achieve the above functions.

[0044] The use principle of the spacing mechanism is as follows: before the packaging box enters the labeling operation for the first time, multiple packaging boxes are first piled up and then released for labeling, which will help to achieve uniform and continuous labeling of the packaging boxes. During operation, the packaging boxes transported by the first main conveyor belt 1 will first be detained by the material blocking component 1702. At this time, the fourth detector will detect the packaging box, and the clamping component 1701 will also clamp the first packaging box. When the length of the number of packaging boxes piled up exceeds d2, that is, the fourth detector and the fifth detector can detect the packaging box at the same time for a long time, the material blocking component 1702 will become a normally open state to allow the packaging box to pass, and the clamping component 1701 will start to release the first packaging box. After that, the second packaging box will be clamped by the clamping component 1701. The clamping time can be set as needed to achieve the release of packaging boxes at regular intervals. When the length of the remaining number of packaging boxes piled up is less than d2, the staff needs to manually block the fifth detector 1704 to release the last few packaging boxes.

[0045] In one specific embodiment, Figure 2 As shown, the first label-wiping mechanism 7 includes two first brushes 701, and the two first brushes 701 are arranged in cooperation with the two side surfaces of the packaging box so as to brush the raised label tail against the side surface of the packaging box conveyed along the first main conveyor belt 1.

[0046] Furthermore, in order to achieve stable output and backward conveyance of the packaging boxes from between the two first side conveyor belts 3, a first discharge conveyor belt 12 with a downward conveying surface is provided above the two first brushes 701 to enable the packaging boxes to be stably output backward from between the two first side conveyor belts 3.

[0047] In one specific embodiment, Figure 3 As shown, the second label-touching mechanism 8 includes two positioning components 801 and two second brushes 802. The two positioning components 801 are driven by the first telescopic cylinder 803 to clamp or release the packaging box, and the two second brushes 802 are driven by the second telescopic cylinder 804 to make the tail end of the label fit against the bottom surface of the packaging box in the clamped state.

[0048] Specifically, when the packaging box passes through the second label-touching mechanism 8, the first telescopic cylinder 803 first operates to make the two positioning components 801 clamp the packaging box. At this time, the two tail ends of the label are tilted upward, and the second telescopic cylinder 804 can be operated to make the two second brushes 802 brush the tail ends flat, that is, brush the tail ends against the upper bottom surface of the packaging box. The second label-touching mechanism 8 not only realizes the label-touching operation of the tail end of the label, but also can plan the packaging box to the entry track of the second feeding conveyor belt 10.

[0049] In one specific embodiment, in order to stably output the packaging boxes from between the two second side conveyor belts 9, a second discharge conveyor belt 13 with a downward conveying surface may be arranged above and behind the second side conveyor belts 9.

[0050] In one specific embodiment, as Figures 5-6 shown, an adjusting assembly 18 is further provided at the bottom of the first side conveyor belt 3 to adjust the distance between the two first side conveyor belts 3 through it. The adjusting assembly 18 specifically includes a fixed seat 1801 and an adjusting seat 1802. The adjusting seat 1802 is fixed to the first side conveyor belt 3. The fixed seat 1801 is fixed relative to the first main conveyor belt 1. For example, it can be fixed to the frame that fixes the first main conveyor belt. The adjusting seat 1802 is slidably disposed on the fixed seat 1801, and an adjusting lead screw 1803 is connected between the fixed seat 1801 and the adjusting seat 1802. The operating end of the adjusting lead screw 1803 is connected with a hand wheel 1804. When the distance needs to be adjusted, the adjusting lead screw can be rotated by rotating the hand wheel, and then the adjusting seat can slide on the fixed seat, and finally the position adjustment of the first side conveyor belt is realized.

[0051] Regarding the second side conveyor belt 9, the above-mentioned adjusting assembly can also be provided at its bottom to realize the distance adjustment.

[0052] The above specific implementation manners cannot be used as a limitation to the protection scope of the present utility model. For those skilled in the art of the present technology, any alternative improvement or transformation made to the implementation manners of the present utility model falls within the protection scope of the present utility model. Where the present utility model is not described in detail, it is all well-known technology in the technical field of the present technology.

Claims

1. An irregular-shaped packaging box labeling machine, characterized in that, The present invention comprises a first main conveyor belt and a second main conveyor belt which are arranged in sequence along the labeling direction, two first side conveyor belts are arranged on both sides above the first main conveyor belt, and the conveying surfaces of the two first side conveyor belts are arranged opposite to each other for limiting the conveying of packaging boxes, a first feeding conveyor belt with a conveying surface facing downwards is arranged above the front ends of the two first side conveyor belts for assisting the inverted packaging boxes to be fed between the two first side conveyor belts, a first label outputting mechanism for vertically outputting a dovetail label is arranged behind the first feeding conveyor belt, the first label outputting mechanism and the two first side conveyor belts cooperate to stick the label head of the dovetail label to the front top surface of the packaging box, a first label sowing mechanism is arranged behind the first label outputting mechanism to make the two label tails of the dovetail label fit to the side surface of the packaging box, and a second label sowing mechanism is arranged on the second main conveyor belt to make the tail ends of the two label tails fit to the bottom surface of the packaging box.

2. The special-shaped packaging box labeling machine according to claim 1, wherein, The second main conveyor belt is offset and lower than the first main conveyor belt, or a robot is set between the two, so that the packaging box can be flipped ninety degrees from the first main conveyor belt to the second main conveyor belt with the bottom facing up. Two second side conveyor belts are also provided behind the second label-attaching mechanism, and a second feeding conveyor belt is provided at the upper front end of the two second side conveyor belts. A second label-outputting mechanism for horizontally outputting the bottom label is provided behind the second feeding conveyor belt. The second label-outputting mechanism and the two second side conveyor belts can cooperate to affix the bottom label to the bottom surface of the packaging box.

3. The special-shaped packaging box labeling machine according to claim 2, characterized in that, A first detector for detecting packaging boxes is provided between the first feeding conveyor belt and the first label output mechanism, a second detector for detecting packaging boxes is provided in front of the second label output mechanism, and a third detector for detecting packaging boxes is provided between the second feeding conveyor belt and the second label output mechanism.

4. The special-shaped packaging box labeling machine according to claim 1 or 3, characterized in that, A spacing mechanism is also provided in front of the first side conveyor belt, and the spacing mechanism includes a clamping assembly and a blocking assembly spaced apart along the conveying direction, and a spacing d1 between the two is smaller than the length of a single packaging box in a fallen state, and a fourth detector is also provided on the side between the clamping assembly and the blocking assembly, and a fifth detector is provided on the front side of the conveying of the clamping assembly, and a spacing d2 between the fifth detector and the blocking assembly is larger than the length of multiple packaging boxes, so that the packaging boxes stacked in front of the blocking assembly can be discharged at regular intervals when the length of the packaging boxes is greater than d2, and can continue to be stacked when the length is less than d2.

5. The special-shaped packaging box labeling machine according to claim 4, characterized in that, The clamping assembly includes two clamping parts, which are driven by a first driving member to clamp or release the packaging box; the blocking assembly includes two blocking parts, which are driven by a second driving member to retain or allow the packaging box to pass.

6. The special-shaped box labeling machine according to claim 1, characterized in that, The first label stroking mechanism includes two first brushes, which are arranged in cooperation with two side surfaces of the packaging box so as to brush the raised label tail against the side surface of the packaging box conveyed along the first main conveyor belt.

7. The special-shaped packaging box labeling machine according to claim 6, characterized in that, A first discharging conveyor belt with a conveying surface facing downward is also provided above the two first brushes, so that the packaging box can be stably conveyed backwards from between the two first side conveyor belts.

8. The special-shaped packaging box labeling machine according to claim 1, wherein, The second label-aligning mechanism includes two positioning components and two second brushes. The two positioning components are driven by a first telescopic cylinder to clamp or release the packaging box, and the two second brushes are driven by a second telescopic cylinder to make the tail end of the label fit the bottom surface of the packaging box in the clamped state.

9. The special-shaped packaging box labeling machine according to claim 2, characterized in that, A second discharging conveyor belt with a downward-facing conveying surface is further provided above the rear of the second side conveyor belt.

10. The special-shaped packaging box labeling machine according to claim 2, wherein, Adjusting components are provided at the bottoms of the first side conveyor belt and / or the second side conveyor belt to adjust the distance between the two first side conveyor belts or the two second side conveyor belts through them; The adjusting component includes a fixed seat and an adjusting seat. The adjusting seat is fixed to the first side conveyor belt or the second side conveyor belt. The fixed seat is fixed relative to the first main conveyor belt or the second main conveyor belt. The adjusting seat is slidably arranged on the fixed seat, and an adjusting lead screw is connected between the fixed seat and the adjusting seat. An operating end of the adjusting lead screw is connected with a hand wheel.

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